# Bulls and cows

(Redirected from Bulls and Cows game)
You are encouraged to solve this task according to the task description, using any language you may know.

Bulls and Cows   is an old game played with pencil and paper that was later implemented using computers.

Create a four digit random number from the digits   1   to   9,   without duplication.

The program should:

•   ask for guesses to this number
•   reject guesses that are malformed
•   print the score for the guess

The score is computed as:

1. The player wins if the guess is the same as the randomly chosen number, and the program ends.
2. A score of one bull is accumulated for each digit in the guess that equals the corresponding digit in the randomly chosen initial number.
3. A score of one cow is accumulated for each digit in the guess that also appears in the randomly chosen number, but in the wrong position.

## 8080 Assembly

This is written to run under CP/M and includes an RNG to generate the secret.

bdos		equ	5
putchar		equ	2
rawio		equ	6
puts		equ	9
cstat		equ	11

org	100h
mvi	c,puts
lxi	d,signon	; Print name
call	bdos
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; Initialize the RNG with keyboard input
mvi	c,puts
lxi	d,entropy	; Ask for randomness
call	bdos
mvi	b,9		; 9 times,
randloop:	mvi	c,3		; read 3 keys.
lxi	h,xabcdat + 1
randkey:	push	b		; Read a key
push	h
randkeywait:	mvi	c,rawio
mvi	e,0FFh
call	bdos
ana	a
jz	randkeywait
pop	h
pop	b
xra	m		; XOR it with the random memory
mov	m,a
inx	h
dcr	c
jnz	randkey		; Go get more characters
dcr	b
jnz	randloop
mvi	c,puts
lxi 	d,done		; Tell the user we're done
call	bdos
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; Generate 4-digit secret code
lxi	h,secret
mvi	b,4
gencode:	push	h
push	b
call	randcode
pop	b
pop	h
mov	m,a
inx	h
dcr	b
jnz	gencode
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; User makes a guess
lxi	d,guess
call	bdos
lxi	d,bufdef
call	bdos
call	newline		; Print newline
mvi	b,4		; Check input
lxi	h,buf
validate:	mov	a,m
cpi	'9' + 1		; >9?
jnc	inval		; = invalid
cpi	'1'		; <1?
jc	inval		; = invalid
sui	'0'		; Make ASCII digit into number
mov	m,a
inx	h
dcr	b
jnz	validate
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; Count bulls
mvi	c,puts
lxi	d,bulls		; Output "Bulls:"
call	bdos
lxi	d,secret
lxi	h,buf
lxi	b,4		; No bulls, counter = 4
bullloop:	ldax	d		; Get secret digit
cmp	m		; Match to buffer digit
cz	countmatch
inx	h
inx	d
dcr	c
jnz	bullloop
push	b		; Keep bulls for cow count,
push	b		; and for final check.
call	printcount
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; Count cows
mvi	c,puts
lxi	d,cows		; Output ", Cows:"
call	bdos
pop	psw		; Retrieve the bulls (into A reg)
cma			; Negate amount of bulls
inr	a
mov	b,a		; Use it as start of cow count
mvi	d,4		; For all 4 secret digits..
lxi	h,secret
cowouter:	mov	a,m		; Grab secret digit to test
push	h		; Store secret position
mvi	e,4		; For all 4 input digits...
lxi	h,buf
cowinner:	cmp	m		; Compare to current secret digit
cz	countmatch
inx	h
dcr	e		; While there are more digits in buf
jnz	cowinner	; Test next digit
pop	h		; Restore secret position
inx	h		; Look at next secret digit
dcr	d		; While there are digits left
jnz	cowouter
push	b		; Keep cow count
call	printcount
call	newline
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; Check win condition
pop	psw		; Cow count (in A)
pop	b		; Bull count (in B)
ana	a		; To win, there must be 0 cows...
mvi	a,4		; And 4 bulls.
cmp	b
mvi	c,puts
lxi	d,win
jmp	bdos
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; Increment bull/cow counter
countmatch:	inr	b
ret
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; Print a newline
newline:	mvi	c,puts
lxi	d,nl
jmp 	bdos
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; Output counter as ASCII
printcount:	mvi	a,'0'
mvi	c,putchar
mov	e,a
jmp	bdos
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; User entered invalid input
inval:		mvi	c,puts
lxi	d,invalid
call	bdos
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; Generate random number 1-9 that isn't in key
randcode:	call	xabcrand
ani	0fh	; Low nybble
ana	a	; 0 = invalid
jz	randcode
cpi	10	; >9 = invalid
jnc	randcode
;; Check if it is a duplicate
mvi	b,4
lxi	h,secret
checkdup:	cmp	m
jz	randcode
inx	h
dcr	b
jnz	checkdup
ret
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; The "X ABC" 8-bit random number generator
;; (Google that to find where it came from)
xabcrand:       lxi     h,xabcdat
inr     m       ; X++
mov     a,m     ; X,
inx     h       ;
xra     m       ; ^ C,
inx     h       ;
xra     m       ; ^ A,
mov     m,a     ; -> A
inx     h
mov     m,a     ; -> B
rar             ; >>1
dcx     h
xra     m       ; ^ A,
dcx     h
mov     m,a     ; -> C
ret
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; Strings
signon:		db	'Bulls and Cows',13,10,'$' entropy: db 'Please mash the keyboard to generate entropy...$'
done:		db	'done.',13,10,13,10,'$' bulls: db 'Bulls:$'
cows:		db	', Cows: $' guess: db 'Guess:$'
invalid: 	db	'Invalid input.',13,10,'$' win: db 'You win!',13,10,'$'
if (calcscore($0, secret)) { exit } } function iswellformed(number, i, digit) { if (number !~ /[1-9][1-9][1-9][1-9]/) { print "Your guess should contain 4 digits, each from 1 to 9. Try again!" return 0 } for (i = 1; i <= 3; i++) { digit = substr(number, 1, 1) number = substr(number, 2) if (index(number, digit) != 0) { print "Your guess contains a digit twice. Try again!" return 0 } } return 1 } function calcscore(guess, secret, bulls, cows, i, idx) { # Bulls = correct digits at the right position # Cows = correct digits at the wrong position for (i = 1; i <= 4; i++) { idx = index(secret, substr(guess, i, 1)) if (idx == i) { bulls++ } else if (idx > 0) { cows++ } } printf("Your score for this guess: Bulls = %d, Cows = %d.", bulls, cows) if (bulls < 4) { printf(" Try again!\n") } else { printf("\nCongratulations, you win!\n") } return bulls == 4 }  Output: Welcome to 'Bulls and Cows'! I thought of a 4-digit number. Please enter your guess. 1234 Your score for this guess: Bulls = 0, Cows = 1. Try again! 5678 Your score for this guess: Bulls = 1, Cows = 1. Try again! 9651 Your score for this guess: Bulls = 1, Cows = 1. Try again! 5729 Your score for this guess: Bulls = 0, Cows = 3. Try again! 2695 Your score for this guess: Bulls = 2, Cows = 1. Try again! 2697 Your score for this guess: Bulls = 2, Cows = 2. Try again! 7692 Your score for this guess: Bulls = 4, Cows = 0. Congratulations, you win!  ## BASIC Works with: QBasic DEFINT A-Z DIM secret AS STRING DIM guess AS STRING DIM c AS STRING DIM bulls, cows, guesses, i RANDOMIZE TIMER DO WHILE LEN(secret) < 4 c = CHR$(INT(RND * 10) + 48)
IF INSTR(secret, c) = 0 THEN secret = secret + c
LOOP

guesses = 0
DO
INPUT "Guess a 4-digit number with no duplicate digits: "; guess
guess = LTRIM$(RTRIM$(guess))
IF LEN(guess) = 0 THEN EXIT DO

IF LEN(guess) <> 4 OR VAL(guess) = 0 THEN
PRINT "** You should enter 4 numeric digits!"
GOTO looper
END IF

bulls = 0: cows = 0: guesses = guesses + 1
FOR i = 1 TO 4
c = MID$(secret, i, 1) IF MID$(guess, i, 1) = c THEN
bulls = bulls + 1
ELSEIF INSTR(guess, c) THEN
cows = cows + 1
END IF
NEXT i
PRINT bulls; " bulls, "; cows; " cows"

IF guess = secret THEN
PRINT "You won after "; guesses; " guesses!"
EXIT DO
END IF
looper:
LOOP


### Applesoft BASIC

100 D$= "123456789" 110 FOR I = 1 TO 4 120 P = INT(RND(1) * LEN(D$)) + 1
130    N$= N$ + MID$(D$, P, 1)
140    D$= MID$(D$, 1, P - 1) + MID$(D$, P + 1, 8) 150 NEXT 160 PRINT "A RANDOM NUMBER HAS BEEN CREATED. 170 PRINT "THE NUMBER HAS FOUR DIGITS FROM 1 TO 9, WITHOUT DUPLICATION." 200 FOR Q = 0 TO 1 STEP 0 210 INPUT "GUESS THE NUMBER: "; G% 220 G$ = STR$(G%) 230 M = LEN(G$) <> 4 OR G% = 0
240     IF NOT M THEN FOR I = 2 TO 4 : M = MID$(G$, I, 1) = "0" : IF NOT M THEN NEXT I
250     IF NOT M THEN FOR I = 1 TO 3 : FOR J = I + 1 TO 4 : M = MID$(G$, I, 1) = MID$(G$, J, 1) : IF NOT M THEN NEXT J, I
260     IF M THEN PRINT "THE GUESS IS MALFORMED." : NEXT Q
270     B = 0
280     C = 0
300     FOR I = 1 TO 4
310         C$= MID$(N$, I, 1) 320 BULL = MID$(G$, I, 1) = C$
330         COW = 0
340         IF NOT BULL THEN FOR J = 1 TO 4 : COW = MID$(G$, J, 1) = C$: IF NOT COW THEN NEXT J 350 B = B + BULL 360 C = C + COW 370 NEXT I 380 PRINT B " BULLS, " C " COWS" 390 Q = G$ = N$400 NEXT Q ### Commodore BASIC Based on the AppleSoft BASIC version. Modifications as follows: • Accommodate 80 character BASIC line length (for line 250 especially), created subroutines. • Booleans in Commodore BASIC evaluate to -1 for TRUE, therefore ABS function added to give desired results. • Leading space in printed numbers (which is placeholder for negative sign) is included in string conversion in Commodore BASIC, therefore RIGHT$ function added on 220 to trim leading whitespace upon conversion.
• Other formatting (clear screen, etc.) unique to Commodore BASIC.
100 D$="123456789" 110 FOR I=1 TO 4 120 P=INT(RND(1)*LEN(D$))+1
130 N$=N$+MID$(D$,P,1)
140 D$=MID$(D$,1,P - 1)+MID$(D$,P+1,8) 150 NEXT 160 PRINT CHR$(147);"A RANDOM NUMBER HAS BEEN CREATED."
170 PRINT "THE NUMBER HAS FOUR DIGITS FROM 1 TO 9, WITHOUT DUPLICATION."
200 FOR Q=0 TO 1 STEP 0
210 INPUT "GUESS THE NUMBER: "; G%
219 REM CONVERT TO STRING AND TRIM LEADING SPACE
220 G$=RIGHT$(STR$(G%),4) 230 M=LEN(G$)<>4 OR G%=0
240 IF NOT M THEN GOSUB 600
250 IF NOT M THEN GOSUB 700
260 IF M THEN PRINT "THE GUESS IS MALFORMED.":NEXT Q
270 B=0
280 C=0
300 FOR I=1 TO 4
310 C$=MID$(N$,I,1) 320 BULL=MID$(G$,I,1)=C$
330 COW=0
340 IF NOT BULL THEN FOR J=1 TO 4:COW=MID$(G$,J,1)=C$:IF NOT COW THEN NEXT J 350 B=B+ABS(BULL) 360 C=C+ABS(COW) 370 NEXT I 380 PRINT "BULLS:";B:PRINT "COWS:";C 390 Q=ABS(G$=N$) 400 NEXT Q 500 PRINT "GOOD JOB!":END 600 FOR I=2 TO 4:M=MID$(G$,I,1)="0" 610 IF NOT M THEN NEXT I 620 RETURN 700 FOR I=1 TO 3 710 FOR J=I+1 TO 4 720 M=MID$(G$,I,1)=MID$(G$,J,1) 730 IF NOT M THEN NEXT J,I 740 RETURN ### IS-BASIC 100 PROGRAM "Bulls.bas" 110 RANDOMIZE 120 STRING C$*4
130 LET GUESS=0
140 DO
150   LET C$=STR$(RND(8701)+1199)
160 LOOP UNTIL CHECK$(C$)=C$170 CLEAR SCREEN:PRINT "Welcome to 'Bulls and Cows!'" 180 DO 190 DO 200 PRINT :INPUT PROMPT "Guess a 4-digit number with no duplicate digits: ":G$
210     IF CHECK$(G$)="" THEN PRINT "You should enter 4-digit number with no duplicate digits."
220   LOOP UNTIL CHECK$(G$)=G$AND G$<>""
230   LET GUESS=GUESS+1:LET BULLS,COWS=0
240   FOR I=1 TO 4
250     IF C$(I)=G$(I) THEN
260       LET BULLS=BULLS+1
270     ELSE IF POS(C$,G$(I))<>0 THEN
280       LET COWS=COWS+1
290     END IF
300   NEXT
310   PRINT BULLS;"bulls,";COWS;"cows"
320 LOOP UNTIL C$=G$
330 PRINT "You won after";GUESS;"guesses!"
340 DEF CHECK$(S$)
350   LET CHECK$="" 360 IF LEN(STR$(VAL(S$)))=4 AND POS(S$,"0")=0 THEN LET CHECK$=S$
370   FOR I=1 TO 4
380     IF POS(S$(:I-1),S$(I)) OR POS(S$(I+1:),S$(I)) THEN LET CHECK$="" 390 NEXT 400 END DEF ### ZX Spectrum Basic Translation of: QBasic 10 DIM n(10): LET c$=""
20 FOR i=1 TO 4
30 LET d=INT (RND*9+1)
40 IF n(d)=1 THEN GO TO 30
50 LET n(d)=1
60 LET c$=c$+STR$d 70 NEXT i 80 LET guesses=0 90 INPUT "Guess a 4-digit number (1 to 9) with no duplicate digits: ";guess 100 IF guess=0 THEN STOP 110 IF guess>9999 OR guess<1000 THEN PRINT "Only 4 numeric digits, please": GO TO 90 120 LET bulls=0: LET cows=0: LET guesses=guesses+1: LET g$=STR$guess 130 FOR i=1 TO 4 140 IF g$(i)=c$(i) THEN LET bulls=bulls+1: GO TO 160 150 IF n(VAL g$(i))=1 THEN LET cows=cows+1
160 NEXT i
170 PRINT bulls;" bulls, ";cows;" cows"
180 IF c$=g$ THEN PRINT "You won after ";guesses;" guesses!": GO TO 10
190 GO TO 90

## Batch File

:: Bulls and Cows Task from Rosetta Code
:: Batch File Implementation

@echo off
setlocal enabledelayedexpansion

:: initialization
:begin
set "list_chars=123456789"
set "list_length=9"
set "code="
set "code_length=4"   %== this should be less than 10 ==%
set "tries=0"   %== number of tries ==%

:: generate the code to be guessed by player
set "chars_left=%list_chars%"
for /l %%c in (1, 1, %code_length%) do (
set /a "rnd=!random! %% (%list_length% + 1 - %%c)"
for %%? in (!rnd!) do set "pick_char=!chars_left:~%%?,1!"
set "code=!code!!pick_char!"
for %%? in (!pick_char!) do set "chars_left=!chars_left:%%?=!"
)

:: get the min and max allowable guess for input validation
set "min=!list_chars:~0,%code_length%!"
set "max="
for /l %%c in (1, 1, %code_length%) do set "max=!max!!list_chars:~-%%c,1!"

:: display game
:display
cls
echo(
echo(Bulls and Cows Game
echo(Batch File Implementation
echo(
echo(Gameplay:
echo(
echo(I have generated a %code_length%-digit code from digits 1-9 without duplication.
echo(Your objective is to guess it. If your guess is equal to my code,
echo(then you WIN. If not, I will score your guess:
echo(
echo(** A score of one BULL is accumulated for each digit in your guess
echo(that equals the corresponding digit in my code.
echo(
echo(** A score of one COW is accumulated for each digit in your guess
echo(that also appears in my code, but in the WRONG position.
echo(
echo(Now, start guessing^^!

:: input guess
:guess
echo(
set "guess="   %== clear input ==%

:: validate input
if "!guess!" gtr "%max%" goto invalid
if "!guess!" lss "%min%" goto invalid
set /a "last_idx=%code_length% - 1"
for /l %%i in (0, 1, %last_idx%) do (
set /a "next_idx=%%i + 1"
for /l %%j in (!next_idx!, 1, %last_idx%) do (
if "!guess:~%%i,1!" equ "!guess:~%%j,1!" goto invalid
)
)
goto score

:: display that input is invalid
:invalid
goto guess

:: scoring section
:score
set /a "tries+=1"
if "%guess%" equ "%code%" goto win
set "cow=0"
set "bull=0"
for /l %%i in (0, 1, %last_idx%) do (
for /l %%j in (0, 1, %last_idx%) do (
if "!guess:~%%i,1!" equ "!code:~%%j,1!" (
if "%%i" equ "%%j" (
set /a "bull+=1"
) else (
set /a "cow+=1"
)
)
)
)
:: display score and go back to user input
echo(BULLS = %bull%; COWS = %cow%.
goto guess

:: player wins!
:win
echo(
echo(After %tries% tries, YOU CRACKED IT^^! My code is %code%.
echo(
set /p "opt=Play again? "
if /i "!opt!" equ "y" goto begin
exit /b 0
Output:
Bulls and Cows Game
Batch File Implementation

Gameplay:

I have generated a 4-digit code from digits 1-9 without duplication.
Your objective is to guess it. If your guess is equal to my code,
then you WIN. If not, I will score your guess:

** A score of one BULL is accumulated for each digit in your guess
that equals the corresponding digit in my code.

** A score of one COW is accumulated for each digit in your guess
that also appears in my code, but in the WRONG position.

Now, start guessing!

BULLS = 0; COWS = 3.

BULLS = 2; COWS = 1.

...

BULLS = 2; COWS = 0.

BULLS = 3; COWS = 0.

BULLS = 3; COWS = 0.

After 10 tries, YOU CRACKED IT! My code is 4821.

Play again? 

## BBC BASIC

      secret$= "" REPEAT c$ = CHR$(&30 + RND(9)) IF INSTR(secret$, c$) = 0 secret$ += c$UNTIL LEN(secret$) = 4

PRINT "Guess a four-digit number with no digit used twice."'
guesses% = 0
REPEAT

REPEAT
INPUT "Enter your guess: " guess$IF LEN(guess$) <> 4 PRINT "Must be a four-digit number"
UNTIL LEN(guess$) = 4 guesses% += 1 IF guess$ = secret$PRINT "You won after "; guesses% " guesses!" : END bulls% = 0 cows% = 0 FOR i% = 1 TO 4 c$ = MID$(secret$, i%, 1)
IF MID$(guess$, i%, 1) = c$THEN bulls% += 1 ELSE IF INSTR(guess$, c$) THEN cows% += 1 ENDIF ENDIF NEXT i% PRINT "You got " ;bulls% " bull(s) and " ;cows% " cow(s)." UNTIL FALSE  ## BCPL get "libhdr" static$( randstate = ? $) let randdigit() = valof$(  let x = ?
$( randstate := random(randstate) x := (randstate >> 7) & 15$) repeatuntil 0 < x <= 9
resultis x
$) let gensecret(s) be for i=0 to 3 s!i := randdigit() repeatuntil valof$(  for j=0 to i-1 if s!i = s!j then resultis false
resultis true
$) let bulls(secret, guess) = valof$(  let x = 0
for i=0 to 3 if secret!i = guess!i then x := x + 1
resultis x
$) let cows(secret, guess) = valof$(  let x = 0
for i=0 to 3
for j=0 to 3
unless i=j
if secret!i = guess!j then x := x + 1
resultis x
$) let readguess(guess) be$(  let g, v = ?, true
writes("Enter a guess, or 0 to quit: ")
if g=0 then finish
for i=3 to 0 by -1
$( guess!i := g rem 10 g := g / 10$)
for i=0 to 2 for j = i+1 to 3
v := v & guess!i ~= 0 & guess!j ~= 0 & guess!i ~= guess!j
if v then return
writes("Invalid guess.*N")
$) repeat let play(secret) be$(  let tries, b, c = 0, ?, ?
let guess = vec 3
$( readguess(guess) b := bulls(secret, guess) c := cows(secret, guess) writef("Bulls: %N, cows: %N*N", b, c); tries := tries + 1$) repeatuntil b = 4
writef("You win in %N tries.*N", tries)
$) let start() be$(  let secret = vec 3
writes("Bulls and cows*N----- --- ----*N")
writes("Please enter a random seed: ")
wrch('*N')
gensecret(secret)
play(secret)
$) Output: Bulls and cows ----- --- ---- Please enter a random seed: 20394 Enter a guess, or 0 to quit: 1234 Bulls: 0, cows: 3 Enter a guess, or 0 to quit: 4321 Bulls: 1, cows: 2 Enter a guess, or 0 to quit: 1423 Bulls: 2, cows: 1 Enter a guess, or 0 to quit: 1243 Bulls: 1, cows: 2 Enter a guess, or 0 to quit: 4123 Bulls: 3, cows: 0 Enter a guess, or 0 to quit: 4523 Bulls: 2, cows: 0 Enter a guess, or 0 to quit: 5123 Bulls: 3, cows: 0 Enter a guess, or 0 to quit: 6123 Bulls: 3, cows: 0 Enter a guess, or 0 to quit: 7123 Bulls: 4, cows: 0 You win in 9 tries. ## Brat secret_length = 4 secret = [1 2 3 4 5 6 7 8 9].shuffle.pop secret_length score = { guess | cows = 0 bulls = 0 guess.each_with_index { digit, index | true? digit == secret[index] { bulls = bulls + 1 } { true? secret.include?(digit) { cows = cows + 1 } } } [cows: cows, bulls: bulls] } won = false guesses = 1 p "I have chosen a number with four unique digits from 1 through 9. Can you guess it?" while { not won } { print "Guess #{guesses}: " guess = g.strip.dice.map { d | d.to_i } when { guess == secret } { p "You won in #{guesses} guesses!"; won = true } { guess.include?(0) || guess.include?(null) } { p "Your guess should only include digits 1 through 9." } { guess.length != secret.length } { p "Your guess was not the correct length. The number has exactly #{secret.length} digits." } { guess.unique.length != secret.length } { p "Each digit should only appear once in your guess." } { true } { result = score guess p "Score: #{result[:bulls]} bulls, #{result[:cows]} cows." guesses = guesses + 1 } } ## C Library: ncurses #include <stdio.h> #include <stdarg.h> #include <stdlib.h> #include <stdbool.h> #include <curses.h> #include <string.h> #define MAX_NUM_TRIES 72 #define LINE_BEGIN 7 #define LAST_LINE 18 int yp=LINE_BEGIN, xp=0; char number; char guess; #define MAX_STR 256 void mvaddstrf(int y, int x, const char *fmt, ...) { va_list args; char buf[MAX_STR]; va_start(args, fmt); vsprintf(buf, fmt, args); move(y, x); clrtoeol(); addstr(buf); va_end(args); } void ask_for_a_number() { int i=0; char symbols[] = "123456789"; move(5,0); clrtoeol(); addstr("Enter four digits: "); while(i<4) { int c = getch(); if ( (c >= '1') && (c <= '9') && (symbols[c-'1']!=0) ) { addch(c); symbols[c-'1'] = 0; guess[i++] = c; } } } void choose_the_number() { int i=0, j; char symbols[] = "123456789"; while(i<4) { j = rand() % 9; if ( symbols[j] != 0 ) { number[i++] = symbols[j]; symbols[j] = 0; } } }  The following function contains the code to check how many bulls and cows there are. bool take_it_or_not() { int i; int cows=0, bulls=0; for(i=0; i < 4; i++) { if ( number[i] == guess[i] ) { bulls++; } else if ( strchr(number, guess[i]) != NULL ) { cows++; } } move(yp, xp); addstr(guess); addch(' '); if ( bulls == 4 ) { yp++; return true; } if ( (cows==0) && (bulls==0) ) addch('-'); while( cows-- > 0 ) addstr("O"); while( bulls-- > 0 ) addstr("X"); yp++; if ( yp > LAST_LINE ) { yp = LINE_BEGIN; xp += 10; } return false; } bool ask_play_again() { int i; while(yp-- >= LINE_BEGIN) { move(yp, 0); clrtoeol(); } yp = LINE_BEGIN; xp = 0; move(21,0); clrtoeol(); addstr("Do you want to play again? [y/n]"); while(true) { int a = getch(); switch(a) { case 'y': case 'Y': return true; case 'n': case 'N': return false; } } } int main() { bool bingo, again; int tries = 0; initscr(); cbreak(); noecho(); clear(); number = guess = 0; mvaddstr(0,0, "I choose a number made of 4 digits (from 1 to 9) without repetitions\n" "You enter a number of 4 digits, and I say you how many of them are\n" "in my secret number but in wrong position (cows or O), and how many\n" "are in the right position (bulls or X)"); do { move(20,0); clrtoeol(); move(21, 0); clrtoeol(); srand(time(NULL)); choose_the_number(); do { ask_for_a_number(); bingo = take_it_or_not(); tries++; } while(!bingo && (tries < MAX_NUM_TRIES)); if ( bingo ) mvaddstrf(20, 0, "You guessed %s correctly in %d attempts!", number, tries); else mvaddstrf(20,0, "Sorry, you had only %d tries...; the number was %s", MAX_NUM_TRIES, number); again = ask_play_again(); tries = 0; } while(again); nocbreak(); echo(); endwin(); return EXIT_SUCCESS; }  ## C# using System; namespace BullsnCows { class Program { static void Main(string[] args) { int[] nums = new int[] { 1, 2, 3, 4, 5, 6, 7, 8, 9 }; KnuthShuffle<int>(ref nums); int[] chosenNum = new int; Array.Copy(nums, chosenNum, 4); Console.WriteLine("Your Guess ?"); while (!game(Console.ReadLine(), chosenNum)) { Console.WriteLine("Your next Guess ?"); } Console.ReadKey(); } public static void KnuthShuffle<T>(ref T[] array) { System.Random random = new System.Random(); for (int i = 0; i < array.Length; i++) { int j = random.Next(array.Length); T temp = array[i]; array[i] = array[j]; array[j] = temp; } } public static bool game(string guess, int[] num) { char[] guessed = guess.ToCharArray(); int bullsCount = 0, cowsCount = 0; if (guessed.Length != 4) { Console.WriteLine("Not a valid guess."); return false; } for (int i = 0; i < 4; i++) { int curguess = (int) char.GetNumericValue(guessed[i]); if (curguess < 1 || curguess > 9) { Console.WriteLine("Digit must be ge greater 0 and lower 10."); return false; } if (curguess == num[i]) { bullsCount++; } else { for (int j = 0; j < 4; j++) { if (curguess == num[j]) cowsCount++; } } } if (bullsCount == 4) { Console.WriteLine("Congratulations! You have won!"); return true; } else { Console.WriteLine("Your Score is {0} bulls and {1} cows", bullsCount, cowsCount); return false; } } } }  ## C++ #include <iostream> #include <string> #include <algorithm> #include <cstdlib> bool contains_duplicates(std::string s) { std::sort(s.begin(), s.end()); return std::adjacent_find(s.begin(), s.end()) != s.end(); } void game() { typedef std::string::size_type index; std::string symbols = "0123456789"; unsigned int const selection_length = 4; std::random_shuffle(symbols.begin(), symbols.end()); std::string selection = symbols.substr(0, selection_length); std::string guess; while (std::cout << "Your guess? ", std::getline(std::cin, guess)) { if (guess.length() != selection_length || guess.find_first_not_of(symbols) != std::string::npos || contains_duplicates(guess)) { std::cout << guess << " is not a valid guess!"; continue; } unsigned int bulls = 0; unsigned int cows = 0; for (index i = 0; i != selection_length; ++i) { index pos = selection.find(guess[i]); if (pos == i) ++bulls; else if (pos != std::string::npos) ++cows; } std::cout << bulls << " bulls, " << cows << " cows.\n"; if (bulls == selection_length) { std::cout << "Congratulations! You have won!\n"; return; } } std::cerr << "Oops! Something went wrong with input, or you've entered end-of-file!\nExiting ...\n"; std::exit(EXIT_FAILURE); } int main() { std::cout << "Welcome to bulls and cows!\nDo you want to play? "; std::string answer; while (true) { while (true) { if (!std::getline(std::cin, answer)) { std::cout << "I can't get an answer. Exiting.\n"; return EXIT_FAILURE; } if (answer == "yes" || answer == "Yes" || answer == "y" || answer == "Y") break; if (answer == "no" || answer == "No" || answer == "n" || answer == "N") { std::cout << "Ok. Goodbye.\n"; return EXIT_SUCCESS; } std::cout << "Please answer yes or no: "; } game(); std::cout << "Another game? "; } }  ## Ceylon import ceylon.random { DefaultRandom } shared void run() { value random = DefaultRandom(); function generateDigits() => random.elements(1..9).distinct.take(4).sequence(); function validate(String guess) { variable value ok = true; if (!guess.every((Character element) => element.digit)) { print("numbers only, please"); ok = false; } if ('0' in guess) { print("only 1 to 9, please"); ok = false; } if (guess.distinct.shorterThan(guess.size)) { print("no duplicates, please"); ok = false; } if (guess.size != 4) { print("4 digits please"); ok = false; } return ok; } function score({Integer*} target, {Integer*} guess) { variable value bulls = 0; variable value cows = 0; for ([a, b] in zipPairs(target, guess)) { if (a == b) { bulls++; } else if (target.contains(b)) { cows++; } } return [bulls, cows]; } while (true) { value digits = generateDigits(); print("I have chosen my four digits, please guess what they are. Use only the digits 1 to 9 with no duplicates and enter them with no spaces. eg 1234 Enter q or Q to quit."); while (true) { if (exists line = process.readLine()) { if (line.uppercased == "Q") { return; } if (validate(line)) { value guessDigits = line.map((Character element) => Integer.parse(element.string)).narrow<Integer>(); value [bulls, cows] = score(digits, guessDigits); if (bulls == 4) { print("You win!"); break; } else { print("Bulls: bulls, Cows: cows"); } } } } } }  ## Clojure (ns bulls-and-cows) (defn bulls [guess solution] (count (filter true? (map = guess solution)))) (defn cows [guess solution] (- (count (filter (set solution) guess)) (bulls guess solution))) (defn valid-input? "checks whether the string is a 4 digit number with unique digits" [user-input] (if (re-seq #"^(?!.*(\d).*\1)\d{4}$" user-input)
true
false))

(defn enter-guess []
"Let the user enter a guess. Verify the input. Repeat until valid.
returns a list of digits enters by the user (# # # #)"
(if (valid-input? guess)
(map #(Character/digit % 10) guess)
(recur))))

(defn bulls-and-cows []
"generate a random 4 digit number from the list of (1 ... 9): no repeating digits
player tries to guess the number with bull and cows rules gameplay"
(let [solution ( take 4 (shuffle (range 1 10)))]
(println "lets play some bulls and cows!")
(loop [guess (enter-guess)]
(println (bulls guess solution) " bulls and " (cows guess solution) " cows.")
(if (not= guess solution)
(recur (enter-guess))
(println "You have won!")))))

(bulls-and-cows)


## CLU

% This program needs to be merged with PCLU's "misc" library
% to use the random number generator.
%
% pclu -merge $CLUHOME/lib/misc.lib -compile bulls_cows.clu % Seed the random number generator with the current time init_rng = proc () d: date := now() seed: int := ((d.hour*60) + d.minute)*60 + d.second random$seed(seed)
end init_rng

% Generate a secret
make_secret = proc () returns (sequence[int])
secret: array[int] := array[int]$[0,0,0,0] for i: int in int$from_to(1,4) do
digit: int
valid: bool := false
while ~valid do
digit := 1+random$next(9) valid := true for j: int in int$from_to(1, i-1) do
if secret[i] = digit then
valid := false
break
end
end
end
secret[i] := digit
end
return(sequence[int]$a2s(secret)) end make_secret % Count the bulls bulls = proc (secret, input: sequence[int]) returns (int) n_bulls: int := 0 for i: int in int$from_to(1,4) do
if secret[i] = input[i] then n_bulls := n_bulls + 1 end
end
return(n_bulls)
end bulls

% Count the cows
cows = proc (secret, input: sequence[int]) returns (int)
n_cows: int := 0
for i: int in int$from_to(1,4) do for j: int in int$from_to(1,4) do
if i ~= j cand secret[i] = input[j] then
n_cows := n_cows + 1
end
end
end
return(n_cows)
end cows

player_guess = proc () returns (sequence[int])
pi: stream := stream$primary_input() po: stream := stream$primary_output()

while true do       % we will keep reading until the guess is valid
stream$puts(po, "Guess? ") guess: string := stream$getl(pi)

% check length
if string$size(guess) ~= 4 then stream$putl(po, "Invalid guess: need four digits.")
continue
end

% get and check digits
valid: bool := true
digits: sequence[int] := sequence[int]$[] for c: char in string$chars(guess) do
i: int := char$c2i(c) - 48 if ~(i>=1 & i<=9) then valid := false break end digits := sequence[int]$addh(digits,i)
end
if ~valid then
stream$putl(po, "Invalid guess: each position needs to be a digit 1-9.") continue end % check that there are no duplicates valid := true for i: int in int$from_to(1,4) do
for j: int in int$from_to(i+1,4) do if digits[i] = digits[j] then valid := false break end end end if ~valid then stream$putl(po, "Invalid guess: there must be no duplicate digits.")
continue
end

return(digits)
end
end player_guess

% Play a game
play_game = proc (secret: sequence[int])
po: stream := stream$primary_output() n_guesses: int := 0 while true do n_guesses := n_guesses + 1 guess: sequence[int] := player_guess() n_bulls: int := bulls(secret, guess) n_cows: int := cows(secret, guess) stream$putl(po, "Bulls: " || int$unparse(n_bulls) || ", cows: " || int$unparse(n_cows))
if n_bulls = 4 then
stream$putl(po, "Congratulations! You won in " || int$unparse(n_guesses) || " tries.")
break
end
end
end play_game

start_up = proc ()
po: stream := stream$primary_output() init_rng() stream$putl(po, "Bulls and cows\n----- --- ----\n")
play_game(make_secret())
end start_up
Output:
Bulls and cows
----- --- ----

Guess? 1234
Bulls: 0, cows: 1
Guess? 5678
Bulls: 0, cows: 2
Guess? 4579
Bulls: 1, cows: 2
Guess? 3579
Bulls: 2, cows: 2
Guess? 3759
Bulls: 4, cows: 0
Congratulations! You won in 5 tries.

## Coco

Library: Underscore.js

To handle I/O, we use functions named say (which simply outputs a string) and prompt (which takes a prompt string to display to the user and returns a line of input, without a trailing newline). These require platform-specific implementations. Here's how they can be implemented for the SpiderMonkey shell:

say = print
prompt = (str) ->
putstr str
readline! ? quit!

We can now solve the task using say and prompt:

const SIZE = 4

secret = _.sample ['1' to '9'], SIZE

for ever
var guess
for ever
guess := _.uniq prompt 'Enter a guess: '
if guess.length === SIZE and not _.difference guess, ['1' to '9'] .length
break
say 'Malformed guess; try again.'
bulls = cows = 0
for i til SIZE
if guess[i] === secret[i]
++bulls
else if _.contains secret, guess[i]
++cows
if bulls === SIZE
break
say "#bulls bull#{[if bulls !== 1 then 's']}, #cows cow#{[if cows !== 1 then 's']}."

say 'A winner is you!'

## Common Lisp

(defun get-number ()
(do ((digits '()))
((>= (length digits) 4) digits)
(pushnew (1+ (random 9)) digits)))

(defun compute-score (guess number)
(let ((cows  0)
(bulls 0))
(map nil (lambda (guess-digit number-digit)
(cond ((= guess-digit number-digit) (incf bulls))
((member guess-digit number)  (incf cows))))
guess number)
(values cows bulls)))

(defun number->guess (number)
(when (integerp number)
(do ((digits '()))
((zerop number) digits)
(multiple-value-bind (quotient remainder) (floor number 10)
(push remainder digits)
(setf number quotient)))))

(defun valid-guess-p (guess)
(and (= 4 (length guess))
(every (lambda (digit) (<= 1 digit 9)) guess)
(equal guess (remove-duplicates guess))))

(defun play-game (&optional (stream *query-io*))
(do ((number (get-number))
(cows   0)
(bulls  0))
((= 4 bulls))
(format stream "~&Guess a 4-digit number: ")
(cond ((not (valid-guess-p guess))
(format stream "~&Malformed guess."))
(t
(setf (values cows bulls) (compute-score guess number))
(if (= 4 bulls)
(format stream "~&Correct, you win!")
(format stream "~&Score: ~a cows, ~a bulls."
cows bulls)))))))


## Crystal

Translation of: Ruby
size = 4
secret = ('1'..'9').to_a.sample(size)
guess = [] of Char

i = 0
loop do
i += 1
loop do
print "Guess #{i}: "
guess = gets.not_nil!.chomp.chars
exit if guess.empty?

break if guess.size == size &&
guess.all? { |x| ('1'..'9').includes? x } &&
guess.uniq.size == size

puts "Problem, try again. You need to enter #{size} unique digits from 1 to 9"
end

if guess == secret
puts "Congratulations you guessed correctly in #{i} attempts"
break
end

bulls = cows = 0
size.times do |j|
if guess[j] == secret[j]
bulls += 1
elsif secret.includes? guess[j]
cows += 1
end
end

puts "Bulls: #{bulls}; Cows: #{cows}"
end


## D

void main() {
import std.stdio, std.random, std.string, std.algorithm,
std.range, std.ascii;

immutable hidden = "123456789"d.randomCover.take(4).array;
while (true) {
"Next guess: ".write;
if (d.count == 4 && d.all!isDigit && d.uniq.count == 4) {
immutable bulls = d.zip(hidden).count!q{ a == a },
cows = d.count!(g => hidden.canFind(g)) - bulls;
if (bulls == 4)
return " You guessed it!".writeln;
writefln("bulls %d, cows %d", bulls, cows);
}
" Bad guess! (4 unique digits, 1-9)".writeln;
}
}

Output:
Next guess: 6548
bulls 0, cows 3
Bad guess! (4 unique digits, 1-9)
Next guess: 5284
bulls 2, cows 1
Bad guess! (4 unique digits, 1-9)
Next guess: 4386
bulls 0, cows 2
Bad guess! (4 unique digits, 1-9)
Next guess: -
Bad guess! (4 unique digits, 1-9)
Next guess: 5894
bulls 3, cows 0
Bad guess! (4 unique digits, 1-9)
Next guess: 5874
bulls 3, cows 0
Bad guess! (4 unique digits, 1-9)
Next guess: 5814
You guessed it!

See #Pascal.

## Draco

union {
ulong state;
struct {
byte x;
byte a;
byte b;
byte c;
} fields;
} rng;

proc rand() byte:
rng.fields.x := rng.fields.x + 1;
rng.fields.a := rng.fields.a >< rng.fields.c >< rng.fields.x;
rng.fields.b := rng.fields.b + rng.fields.a;
rng.fields.c := rng.fields.c + (rng.fields.b >> 1) >< rng.fields.a;
rng.fields.c
corp

proc rand_digit() byte:
byte digit;
while
digit := rand() & 15;
digit < 1 or digit >= 10
do od;
digit
corp

proc make_secret(byte secret) void:
int i, j;
bool ok;
for i from 0 upto 3 do
while
secret[i] := rand_digit();
ok := true;
for j from 0 upto i-1 do
ok := ok and secret[i] /= secret[j]
od;
not ok
do od
od
corp

proc bulls(byte secret, guess) byte:
byte i, count;
count := 0;
for i from 0 upto 3 do
if secret[i] = guess[i] then count := count + 1 fi
od;
count
corp

proc cows(byte secret, guess) byte:
byte i, j, count;
count := 0;
for i from 0 upto 3 do
for j from 0 upto 3 do
if i /= j and secret[i] = guess[j] then count := count + 1 fi
od
od;
count
corp

word guessNo;
byte i;

while
write("Guess? ");
if guessNo<1111 or guessNo>9999 then true
else
for i from 3 downto 0 do
guess[i] := guessNo % 10;
guessNo := guessNo / 10;
od;
guess*guess*guess*guess = 0
fi
do
writeln("A guess must be a four-digit number not containing zeroes.")
od
corp

proc play_game(byte secret) word:
byte guess;
word tries;
tries := 1;

while
writeln("Bulls: ", bulls(secret, guess), ", cows: ", cows(secret, guess));
bulls(secret, guess) /= 4
do
tries := tries + 1
od;
tries
corp

proc main() void:
byte secret;
word tries;

write("Please enter a random seed: ");
make_secret(secret);
tries := play_game(secret);
writeln();
writeln("You got it in ", tries, " tries.")
corp
Output:
Please enter a random seed: 123456
Guess? 1234
Bulls: 2, cows: 1
Guess? 5678
Bulls: 0, cows: 0
Guess? 9234
Bulls: 1, cows: 2
Guess? 1934
Bulls: 3, cows: 0
Guess? 1294
Bulls: 2, cows: 2
Guess? 1924
Bulls: 4, cows: 0

You got it in 6 tries.

## E

Note: This example was deliberately written in an abstracted style, separating out the algorithms, game logic, and UI.

def Digit := 1..9
def Number := Tuple[Digit,Digit,Digit,Digit]

/** Choose a random number to be guessed. */
def pick4(entropy) {
def digits := [1,2,3,4,5,6,7,8,9].diverge()

# Partial Fisher-Yates shuffle
for i in 0..!4 {
def other := entropy.nextInt(digits.size() - i) + i
def t := digits[other]
digits[other] := digits[i]
digits[i] := t
}
return digits(0, 4)
}

/** Compute the score of a guess. */
def scoreGuess(actual :Number, guess :Number) {
var bulls := 0
var cows := 0
for i => digit in guess {
if (digit == actual[i]) {
bulls += 1
} else if (actual.indexOf1(digit) != -1) {
cows += 1
}
}
return [bulls, cows]
}

/** Parse a guess string into a list of digits (Number). */
def parseGuess(guessString, fail) :Number {
if (guessString.size() != 4) {
return fail(I need four digits, not ${guessString.size()} digits.) } else { var digits := [] for c in guessString { if (('1'..'9')(c)) { digits with= c - '0' } else { return fail(I need a digit from 1 to 9, not "$c".)
}
}
return digits
}
}

/** The game loop: asking for guesses and reporting scores and win conditions.
The return value is null or a broken reference if there was a problem. */
def actual := pick4(entropy)

def gameTurn() {
return when (def guessString := askUserForGuess <- ()) -> {
escape tellAndContinue {

def guess := parseGuess(guessString, tellAndContinue)
def [bulls, cows] := scoreGuess(actual, guess)

if (bulls == 4) {
tellUser <- (You got it! The number is $actual!) null } else { tellAndContinue(Your score for$guessString is $bulls bulls and$cows cows.)
}

} catch message {
# The parser or scorer has something to say, and the game continues afterward
when (tellUser <- (message)) -> {
gameTurn()
}
}
} catch p {
# Unexpected problem of some sort
tellUser <- ("Sorry, game crashed.")
throw(p)
}
}

return gameTurn()
}

### REPL user interface

def replBullsAndCows() {
when (
bullsAndCows(fn {
def [guess, env] := edef guess; guess.evalToPair(interp.getTopScope().nestOuter())
interp.setTopScope(env)
guess
}, println, entropy)
) -> {} catch p {
println($p${p.eStack()})
}
}

### Graphical user interface

Works with: E-on-Java
(Java Swing)
def guiBullsAndCows() {
var lastGuess := ""
def op := <unsafe:javax.swing.makeJOptionPane>
return bullsAndCows(fn {
lastGuess := op.showInputDialog(null, "Enter your guess:", lastGuess)
if (lastGuess == null) {
# canceled, so just fail to return an answer and let the game logic get GCed
Ref.promise()
} else {
lastGuess
}
}, fn msg {
op.showMessageDialog(null, msg)
}, entropy)
}

## EasyLang

dig[] = [ 1 2 3 4 5 6 7 8 9 ]
for i = 1 to 4
h = i - 1 + random (10 - i)
swap dig[i] dig[h]
.
# print dig[]
len g[] 4
attempts = 0
repeat
repeat
ok = 0
s$[] = strchars input if len s$[] = 4
ok = 1
for i = 1 to 4
g[i] = number s$[i] if g[i] = 0 ok = 0 . . . until ok = 1 . print g[] attempts += 1 bulls = 0 cows = 0 for i = 1 to 4 if g[i] = dig[i] bulls += 1 else for j = 1 to 4 if dig[j] = g[i] cows += 1 . . . . print "bulls:" & bulls & " cows:" & cows until bulls = 4 . print "Well done! " & attempts & " attempts needed."  ## Eiffel class BULLS_AND_COWS create execute feature execute -- Initiate game. do io.put_string ("Let's play bulls and cows.%N") create answer.make_empty play end feature {NONE} play -- Plays bulls ans cows. local count, seed: INTEGER guess: STRING do from until seed > 0 loop io.put_string ("Enter a positive integer.%NYour play will be generated from it.%N") io.read_integer seed := io.last_integer end generate_answer (seed) io.put_string ("Your game has been created.%N Try to guess the four digit number.%N") create guess.make_empty from until guess ~ answer loop io.put_string ("Guess: ") io.read_line guess := io.last_string if guess.count = 4 and guess.is_natural and not guess.has ('0') then io.put_string (score (guess) + "%N") count := count + 1 else io.put_string ("Your input does not have the correct format.") end end io.put_string ("Congratulations! You won with " + count.out + " guesses.") end answer: STRING generate_answer (s: INTEGER) -- Answer with 4-digits between 1 and 9 stored in 'answer'. require positive_seed: s > 0 local random: RANDOM ran: INTEGER do create random.set_seed (s) from until answer.count = 4 loop ran := (random.double_item * 10).floor if ran > 0 and not answer.has_substring (ran.out) then answer.append (ran.out) end random.forth end ensure answer_not_void: answer /= Void correct_length: answer.count = 4 end score (g: STRING): STRING -- Score for the guess 'g' depending on 'answer'. require same_length: answer.count = g.count local k: INTEGER a, ge: STRING do Result := "" a := answer.twin ge := g.twin across 1 |..| a.count as c loop if a [c.item] ~ ge [c.item] then Result := Result + "BULL " a [c.item] := ' ' ge [c.item] := ' ' end end across 1 |..| a.count as c loop if a [c.item] /= ' ' then k := ge.index_of (a [c.item], 1) if k > 0 then Result := Result + "COW " ge [k] := ' ' end end end end end  Output: Let's play bulls and cows. Enter a positive integer. Your play will be generated from it. 2 Guess: 2497 BULL COW Guess: 2486 BULL COW COW Guess: 2485 BULL COW COW Guess: 2483 BULL BULL COW COW Guess: 2438 BULL COW COW COW Guess: 2843 BULL BULL BULL BULL Congratulations! You won with 6 guesses.  ## Elena ELENA 6.x : import system'routines; import extensions; class GameMaster { field _numbers; field _attempt; constructor() { // generate secret number var randomNumbers := new int[]{1,2,3,4,5,6,7,8,9}.randomize(9); _numbers := randomNumbers.Subarray(0, 4); _attempt := new Integer(1); } ask() { var row := console.print("Your Guess #",_attempt," ?").readLine(); ^ row.toArray() } proceed(guess) { int cows := 0; int bulls := 0; if (guess.Length != 4) { bulls := -1 } else { try { for (int i := 0, i < 4, i+=1) { var ch := guess[i]; var number := ch.toString().toInt(); // check range ifnot (number > 0 && number < 10) { InvalidArgumentException.raise() }; // check duplicates var duplicate := guess.seekEach:(x => (x == ch)&&(x.equalReference(ch).Inverted)); if (nil != duplicate) { InvalidArgumentException.raise() }; if (number == _numbers[i]) { bulls += 1 } else { if (_numbers.ifExists(number)) { cows += 1 } } } } catch(Exception e) { bulls := -1 } }; bulls => -1 { console.printLine:"Not a valid guess."; ^ true } 4 { console.printLine:"Congratulations! You have won!"; ^ false } : { _attempt.append(1); console.printLine("Your Score is ",bulls," bulls and ",cows," cows"); ^ true } } } public program() { var gameMaster := new GameMaster(); var process :=$lazy gameMaster.proceed(gameMaster.ask());

process.doWhile();

}
Output:
Your Guess #1 ?2497
Your Score is 1 bulls and 1 cows
Your Score is 1 bulls and 2 cows
Your Score is 1 bulls and 2 cows
Your Score is 2 bulls and 2 cows
Your Score is 1 bulls and 3 cows
Congratulations! You have won!


## Elixir

Works with: Elixir version 1.2
defmodule Bulls_and_cows do
def play(size \\ 4) do
secret = Enum.take_random(1..9, size) |> Enum.map(&to_string/1)
play(size, secret)
end

defp play(size, secret) do
guess = input(size)
if guess == secret do
IO.puts "You win!"
else
{bulls, cows} = count(guess, secret)
IO.puts "  Bulls: #{bulls}; Cows: #{cows}"
play(size, secret)
end
end

defp input(size) do
guess = IO.gets("Enter your #{size}-digit guess: ") |> String.strip
cond do
guess == "" ->
IO.puts "Give up"
exit(:normal)
String.length(guess)==size and String.match?(guess, ~r/^[1-9]+$/) -> String.codepoints(guess) true -> input(size) end end defp count(guess, secret) do Enum.zip(guess, secret) |> Enum.reduce({0,0}, fn {g,s},{bulls,cows} -> cond do g == s -> {bulls + 1, cows} g in secret -> {bulls, cows + 1} true -> {bulls, cows} end end) end end Bulls_and_cows.play  Output: Enter your 4-digit guess: 1234 Bulls: 1; Cows: 1 Enter your 4-digit guess: 5678 Bulls: 0; Cows: 2 Enter your 4-digit guess: 2345 Bulls: 0; Cows: 1 Enter your 4-digit guess: 1456 Bulls: 1; Cows: 0 Enter your 4-digit guess: 1782 You win!  ## Erlang Module: -module(bulls_and_cows). -export([generate_secret/0, score_guess/2, play/0]). % generate the secret code generate_secret() -> generate_secret([], 4, lists:seq(1,9)). generate_secret(Secret, 0, _) -> Secret; generate_secret(Secret, N, Digits) -> Next = lists:nth(random:uniform(length(Digits)), Digits), generate_secret(Secret ++ [Next], N - 1, Digits -- [Next]). % evaluate a guess score_guess(Secret, Guess) when length(Secret) =/= length(Guess) -> throw(badguess); score_guess(Secret, Guess) -> Bulls = count_bulls(Secret,Guess), Cows = count_cows(Secret, Guess, Bulls), [Bulls, Cows]. % count bulls (exact matches) count_bulls(Secret, Guess) -> length(lists:filter(fun(I) -> lists:nth(I,Secret) == lists:nth(I,Guess) end, lists:seq(1, length(Secret)))). % count cows (digits present but out of place) count_cows(Secret, Guess, Bulls) -> length(lists:filter(fun(I) -> lists:member(I, Guess) end, Secret)) - Bulls. % play a game play() -> play_round(generate_secret()). play_round(Secret) -> play_round(Secret, read_guess()). play_round(Secret, Guess) -> play_round(Secret, Guess, score_guess(Secret,Guess)). play_round(_, _, [4,0]) -> io:put_chars("Correct!\n"); play_round(Secret, _, Score) -> io:put_chars("\tbulls:"), io:write(hd(Score)), io:put_chars(", cows:"), io:write(hd(tl(Score))), io:put_chars("\n"), play_round(Secret). read_guess() -> lists:map(fun(D)->D-48 end, lists:sublist(io:get_line("Enter your 4-digit guess: "), 4)).  Script: #!/usr/bin/escript % Play Bulls and Cows main(_) -> random:seed(now()), bulls_and_cows:play().  Sample play: Enter your 4-digit guess: 8376 bulls:1, cows:0 Enter your 4-digit guess: 8941 bulls:1, cows:1 Enter your 4-digit guess: 8529 bulls:1, cows:1 Enter your 4-digit guess: 4926 bulls:1, cows:1 Enter your 4-digit guess: 9321 Correct!  ## Euphoria Works with: Euphoria version 4.0.3, 4.0.0 RC1 and later include std\text.e include std\os.e include std\sequence.e include std\console.e sequence bcData = {0,0} --bull,cow score for the player sequence goalNum = { {0,0,0,0}, {0,0,0,0}, 0} --computer's secret number digits (element 1), marked as bull/cow --indexes in element 2, integer value of it in element 3 sequence currentGuess = { {0,0,0,0}, {0,0,0,0}, 0} --player's guess, same format as goalNum sequence removeChars = 0 & " 0\r\t\n" --characters to trim (remove) from user's input. \r, \t are single escaped characters, --0 is ascii 0x0 and number zero is ascii 48, or 0x30. The rest are wysiwyg integer tries = 0 --track number of tries to guess the number sequence bcStrings ={"bull", "cow"} --stores singular and/or plural strings depending on score in bcData goalNum = rand( {9,9,9,9} ) --rand function works on objects. here it outputs into each sequence element. goalNum = goalNum * 1000 + goalNum * 100 + goalNum * 10 + goalNum --convert digits to an integer --and store it procedure getInputAndProcess(integer stage = 1) --object = 1 sets default value for the parameter if it isn't specified goalNum[1..4] = 0 --{0,0,0,0} --set these to unscaned (0) since the scanning will start over. currentGuess[1..4] = 0 --{0,0,0,0} --these too, or they will contain old marks currentGuess[1..4] = 0 tries += 1 --equivalent to tries = tries + 1, but faster and shorter to write bcData[1..2] = 0 -- {0,0} if stage <= 1 then --if this process was run for the first time or with no parameters, then.. puts(1,"The program has thought of a four digit number using only digits 1 to 9.\nType your guess and press enter.\n") end if while 1 label "guesscheck" do --labels can be used to specify a jump point from exit or retry, and help readability currentGuess = trim(gets(0), removeChars) --get user input, trim unwanted characters from it, store it in currentGuess currentGuess = mapping( currentGuess, {49,50,51,52,53,54,55,56,57}, {1,2,3,4,5,6,7,8,9} ) --convert ascii codes to -- integer digits they represent integer tempF = find('0',currentGuess) if length(currentGuess) != 4 or tempF != 0 then --if the input string is now more than 4 characters/integers, --the input won't be used. puts(1,"You probably typed too many digits or a 0. Try typing a new 4 digit number with only numbers 1 through 9.\n") retry "guesscheck" else exit "guesscheck" end if end while --convert separate digits to the one integer they represent and store it, like with goalNum currentGuess = currentGuess * 1000 + currentGuess * 100 + currentGuess * 10 + currentGuess --convert digits to the integer they represent, to print to a string later --check for bulls for i = 1 to 4 do if goalNum[i] = currentGuess[i] then goalNum[i] = 1 currentGuess[i] = 1 bcData += 1 end if end for --check for cows, but not slots marked as bulls or cows already. for i = 1 to 4 label "iGuessElem"do --loop through each guessed digit for j = 1 to 4 label "jGoalElem" do --but first go through each goal digit, comparing the first guessed digit, --and then the other guessed digits 2 through 4 if currentGuess[i] = 1 then --if the guessed digit we're comparing right now has been marked as bull or cow already continue "iGuessElem" --skip to the next guess digit without comparing this guess digit to the other goal digits end if if goalNum[j] = 1 then --if the goal digit we're comparing to right now has been marked as a bull or cow already continue "jGoalElem" --skip to the next goal digit end if if currentGuess[i] = goalNum[j] then --if the guessed digit is the same as the goal one, --it won't be a bull, so it's a cow bcData += 1 --score one more cow goalNum[j] = 1 --mark this digit as a found cow in the subsequence that stores 0's or 1's as flags continue "iGuessElem" --skip to the next guess digit, so that this digit won't try to check for --matches(cow) with other goal digits end if end for --this guess digit was compared to one goal digit , try comparing this guess digit with the next goal digit end for --this guess digit was compared with all goal digits, compare the next guess digit to all the goal digits if bcData = 1 then --uses singular noun when there is score of 1, else plural bcStrings = "bull" else bcStrings = "bulls" end if if bcData = 1 then --the same kind of thing as above block bcStrings = "cow" else bcStrings = "cows" end if if bcData < 4 then --if less than 4 bulls were found, the player hasn't won, else they have... printf(1, "Guess #%d : You guessed %d . You found %d %s, %d %s. Type new guess.\n", {tries, currentGuess, bcData, bcStrings, bcData, bcStrings} ) getInputAndProcess(2) else --else they have won and the procedure ends printf(1, "The number was %d. You guessed %d in %d tries.\n", {goalNum, currentGuess, tries} ) any_key()--wait for keypress before closing console window. end if end procedure --run the procedure getInputAndProcess(1) Output : The program has thought of a four digit number using only digits 1 to 9. Type your guess and press enter. 7456 Guess #1 : You guessed 7456 . You found 1 bull, 1 cow. Type new guess. 7116 Guess #2 : You guessed 7116 . You found 1 bull, 0 cows. Type new guess. 7862 Guess #3 : You guessed 7862 . You found 0 bulls, 2 cows. Type new guess. 1826 [...etc] 6586 Guess #10 : You guessed 6586 . You found 3 bulls, 0 cows. Type new guess. 5586 Guess #11 : You guessed 5586 . You found 3 bulls, 0 cows. Type new guess. 2586 Guess #12 : You guessed 2586 . You found 3 bulls, 0 cows. Type new guess. 9586 The number was 9586. You guessed 9586 in 13 tries. Press Any Key to continue...  ## F# open System let generate_number targetSize = let rnd = Random() let initial = Seq.initInfinite (fun _ -> rnd.Next(1,9)) initial |> Seq.distinct |> Seq.take(targetSize) |> Seq.toList let countBulls guess target = let hits = List.map2 (fun g t -> if g = t then true else false) guess target List.filter (fun x -> x = true) hits |> List.length let countCows guess target = let mutable score = 0 for g in guess do for t in target do if g = t then score <- score + 1 else score <- score score let countScore guess target = let bulls = countBulls guess target let cows = countCows guess target (bulls, cows) let playRound guess target = countScore guess target let inline ctoi c : int = int c - int '0' let lineToList (line: string) = let listc = Seq.map(fun c -> c |> string) line |> Seq.toList let conv = List.map(fun x -> Int32.Parse x) listc conv let readLine() = let line = Console.ReadLine() if line <> null then if line.Length = 4 then Ok (lineToList line) else Error("Input guess must be 4 characters!") else Error("Input guess cannot be empty!") let rec handleInput() = let line = readLine() match line with | Ok x -> x | Error s -> printfn "%A" s handleInput() [<EntryPoint>] let main argv = let target = generate_number 4 let mutable shouldEnd = false while shouldEnd = false do let guess = handleInput() let (b, c) = playRound guess target printfn "Bulls: %i | Cows: %i" b c if b = 4 then shouldEnd <- true else shouldEnd <- false 0  ## FreeBASIC function get_digit( num as uinteger, ps as uinteger ) as uinteger return (num mod 10^(ps+1))\10^ps end function function is_malformed( num as uinteger ) as boolean if num > 9876 then return true dim as uinteger i, j for i = 0 to 2 for j = i+1 to 3 if get_digit( num, j ) = get_digit( num, i ) then return true next j next i return false end function function make_number() as uinteger dim as uinteger num = 0 while is_malformed(num) num = int(rnd*9877) wend return num end function randomize timer dim as uinteger count=0, num=make_number(), guess=0 dim as uinteger cows, bulls, i, j while guess <> num count += 1 do print "Guess a number. " input guess loop while is_malformed(guess) cows = 0 bulls = 0 for i = 0 to 3 for j = 0 to 3 if get_digit( num, i ) = get_digit( guess, j ) then if i= j then bulls += 1 if i<>j then cows += 1 end if next j next i print using "You scored # bulls and # cows."; bulls; cows wend print using "Correct. That took you ### guesses."; count  ## Factor USING: accessors assocs combinators fry grouping hashtables kernel locals math math.parser math.ranges random sequences strings io ascii ; IN: bullsncows TUPLE: score bulls cows ; : <score> ( -- score ) 0 0 score boa ; TUPLE: cow ; : <cow> ( -- cow ) cow new ; TUPLE: bull ; : <bull> ( -- bull ) bull new ; : inc-bulls ( score -- score ) dup bulls>> 1 + >>bulls ; : inc-cows ( score -- score ) dup cows>> 1 + >>cows ; : random-nums ( -- seq ) 9 [1,b] 4 sample ; : add-digits ( seq -- n ) 0 [ swap 10 * + ] reduce number>string ; : new-number ( -- n narr ) random-nums dup add-digits ; : narr>nhash ( narr -- nhash ) { 1 2 3 4 } swap zip ; : num>hash ( n -- hash ) [ 1string string>number ] { } map-as narr>nhash ; :: cow-or-bull ( n g -- arr ) { { [ n first g at n second = ] [ <bull> ] } { [ n second g value? ] [ <cow> ] } [ f ] } cond ; : add-to-score ( arr -- score ) <score> [ bull? [ inc-bulls ] [ inc-cows ] if ] reduce ; : check-win ( score -- ? ) bulls>> 4 = ; : sum-score ( n g -- score ? ) '[ _ cow-or-bull ] map sift add-to-score dup check-win ; : print-sum ( score -- str ) dup bulls>> number>string "Bulls: " swap append swap cows>> number>string " Cows: " swap 3append "\n" append ; : (validate-readln) ( str -- ? ) dup length 4 = not swap [ letter? ] all? or ; : validate-readln ( -- str ) readln dup (validate-readln) [ "Invalid input.\nPlease enter a valid 4 digit number: " write flush drop validate-readln ] when ; : win ( -- ) "\nYou've won! Good job. You're so smart." print flush ; : main-loop ( x -- ) "Enter a 4 digit number: " write flush validate-readln num>hash swap [ sum-score swap print-sum print flush ] keep swap not [ main-loop ] [ drop win ] if ; : main ( -- ) new-number drop narr>nhash main-loop ;  ## Fan ** ** Bulls and cows. A game pre-dating, and similar to, Mastermind. ** class BullsAndCows { Void main() { digits := [1,2,3,4,5,6,7,8,9] size := 4 chosen := [,] size.times { chosen.add(digits.removeAt(Int.random(0..<digits.size))) } echo("I've chosen$size unique digits from 1 to 9 at random.
Try to guess my number!")
guesses := 0
while (true) // game loop
{
guesses += 1
guess := Int[,]
while (true) // input loop
{
// get a good guess
Sys.out.print("\nNext guess [$guesses]: ") Sys.out.flush inString := Sys.in.readLine?.trim ?: "" inString.each |ch| { if (ch >= '1' && ch <= '9' && !guess.contains(ch)) guess.add(ch-'0') } if (guess.size == 4) break // input loop echo("Oops, try again. You need to enter$size unique digits from 1 to 9")
}
if (guess.all |v, i->Bool| { return v == chosen[i] })
{
echo("\nCongratulations! You guessed correctly in $guesses guesses") break // game loop } bulls := 0 cows := 0 (0 ..< size).each |i| { if (guess[i] == chosen[i]) bulls += 1 else if (chosen.contains(guess[i])) cows += 1 } echo("\n$bulls Bulls\n  $cows Cows") } } }  ## FOCAL 01.10 T %1,"BULLS AND COWS"!"----- --- ----"!! 01.20 S T=0;D 3 01.30 D 2;D 5;S T=T+1;T "BULLS",B," COWS",C,!! 01.40 I (B-4)1.3 01.50 T "YOU WON! GUESSES",%4,T,!! 01.60 Q 02.10 A "GUESS",A 02.20 F X=0,3;S B=FITR(A/10);S G(3-X)=A-B*10;S A=B 02.30 S A=1 02.40 F X=0,3;S A=A*G(X) 02.50 I (-A)2.6;T "NEED FOUR NONZERO DIGITS"!;G 2.1 02.60 F X=0,2;F Y=X+1,3;S A=A*(FABS(G(X)-G(Y))) 02.70 I (-A)2.8;T "NO DUPLICATES ALLOWED"!;G 2.1 02.80 R 03.10 F X=0,3;S S(X)=0 03.20 F X=0,3;D 4;S S(X)=A 04.10 S A=10*FRAN();S A=FITR(1+9*(A-FITR(A))) 04.20 S Z=1 04.30 F Y=0,3;S Z=Z*(FABS(A-S(Y))) 04.40 I (-Z)4.5,4.1 04.50 R 05.10 S B=0 05.20 F X=0,3;D 5.6 05.30 S C=-B 05.40 F X=0,3;F Y=0,3;D 5.7 05.50 R 05.60 I (-FABS(S(X)-G(X)))5.5,5.8 05.70 I (-FABS(S(X)-G(Y)))5.5,5.9 05.80 S B=B+1 05.90 S C=C+1 Output: BULLS AND COWS ----- --- ---- GUESS:1234 BULLS= 0 COWS= 3 GUESS:3214 BULLS= 1 COWS= 2 GUESS:3124 BULLS= 2 COWS= 1 GUESS:3145 BULLS= 3 COWS= 0 GUESS:3146 BULLS= 3 COWS= 0 GUESS:3147 BULLS= 3 COWS= 0 GUESS:3148 BULLS= 3 COWS= 0 GUESS:3149 BULLS= 4 COWS= 0 YOU WON! GUESSES= 8 ## Forth Works with: GNU Forth include random.fs create hidden 4 allot : ok? ( str -- ? ) dup 4 <> if 2drop false exit then 1 9 lshift 1- -rot bounds do i c@ '1 - dup 0 9 within 0= if 2drop false leave then 1 swap lshift over and dup 0= if nip leave then xor loop 0<> ; : init begin hidden 4 bounds do 9 random '1 + i c! loop hidden 4 ok? until ; : check? ( addr -- solved? ) 0 4 0 do over i + c@ 4 0 do dup hidden i + c@ = if swap i j = if 8 else 1 then + swap then loop drop loop nip 8 /mod tuck . ." bulls, " . ." cows" 4 = ; : guess: ( "1234" -- ) bl parse 2dup ok? 0= if 2drop ." Bad guess! (4 unique digits, 1-9)" exit then drop check? if cr ." You guessed it!" then ;  Output: init ok guess: 1234 1 bulls, 0 cows ok guess: 1567 1 bulls, 1 cows ok guess: 1895 2 bulls, 1 cows ok guess: 1879 4 bulls, 0 cows You guessed it! ok ## Fortran Works with: Fortran version 90 and later module bac implicit none contains subroutine Gennum(n) integer, intent(out) :: n(4) integer :: i, j real :: r call random_number(r) n(1) = int(r * 9.0) + 1 i = 2 outer: do while (i <= 4) call random_number(r) n(i) = int(r * 9.0) + 1 inner: do j = i-1 , 1, -1 if (n(j) == n(i)) cycle outer end do inner i = i + 1 end do outer end subroutine Gennum subroutine Score(n, guess, b, c) character(*), intent(in) :: guess integer, intent(in) :: n(0:3) integer, intent(out) :: b, c integer :: digit, i, j, ind b = 0; c = 0 do i = 1, 4 read(guess(i:i), "(i1)") digit if (digit == n(i-1)) then b = b + 1 else do j = i, i+2 ind = mod(j, 4) if (digit == n(ind)) then c = c + 1 exit end if end do end if end do end subroutine Score end module bac program Bulls_and_Cows use bac implicit none integer :: n(4) integer :: bulls=0, cows=0, tries=0 character(4) :: guess call random_seed call Gennum(n) write(*,*) "I have selected a number made up of 4 digits (1-9) without repetitions." write(*,*) "You attempt to guess this number." write(*,*) "Every digit in your guess that is in the correct position scores 1 Bull" write(*,*) "Every digit in your guess that is in an incorrect position scores 1 Cow" write(*,*) do while (bulls /= 4) write(*,*) "Enter a 4 digit number" read*, guess if (verify(guess, "123456789") /= 0) then write(*,*) "That is an invalid entry. Please try again." cycle end if tries = tries + 1 call Score (n, guess, bulls, cows) write(*, "(a, i1, a, i1, a)") "You scored ", bulls, " bulls and ", cows, " cows" write(*,*) end do write(*,"(a,i0,a)") "Congratulations! You correctly guessed the correct number in ", tries, " attempts" end program Bulls_and_Cows  ## Frink // Bulls and Cows - Written in Frink println["Welcome to Bulls and Cows!"] // Put 4 random digits into target array digits = array[1 to 9] target = new array for i = 0 to 3 { target@i = digits.removeRandom[] } // Game variables guessCount = 0 solved = 0 while solved == 0 { // Round variables bulls = 0 cows = 0 // Input guess from player guess = input["Guess a 4 digit number with numbers 1 to 9: "] // Valid Guess Tests. Set validGuess to 1. If any test fails it will be set to 0 validGuess = 1 // Test for exactly 4 digits if length[guess] != 4 { println["$guess is invalid. Your guess must be 4 digits."]
validGuess = 0
}
// Test for any characters not in 1 - 9 using regex
if guess =~ %r/[^1-9]/
{
println["$guess is invalid. Your guess can only contain the digits 1 through 9."] validGuess = 0 } // Check for duplicate digits in guess comboCheck = 1 guessArr = charList[guess] // Split guess string into array of characters. guessArrCombos = guessArr.combinations // Divide the array into all possible 2 digits combinations. for geussCombo = guessArrCombos { if geussCombo@0 == geussCombo@1 // If the two digits in the combinations are the same mark the comboCheck as failed. comboCheck = 0 } if comboCheck == 0 { println["$guess is invalid. Each digit in your guess should be unique."]
validGuess = 0
}

// If all tests pass, continue with the game.
if validGuess == 1
{
guessCount = guessCount + 1
for i = 0 to 3
{
if parseInt[guessArr@i] == target@i // Convert guess from string to int. Frink imports all input as strings.
{
bulls = bulls + 1
next // If bull is found, skip the contains check.
}
if target.contains[parseInt[guessArr@i]]
{
cows = cows + 1
}
}
if bulls == 4
{
solved = 1 // Exit from While loop.
} else
{
// Print the results of the guess. Formatting for plurals.
bullsPlural = bulls == 1 ? "bull" : "bulls"
cowsPlural = cows == 1 ? "cow" : "cows"
println["Your guess of $guess had$bulls $bullsPlural and$cows $cowsPlural."] } } } guessPlural = guessCount == 1 ? "guess" : "guesses" println["Congratulations! Your guess of$guess was correct! You solved this in $guessCount$guessPlural."]
Output:
Welcome to Bulls and Cows!
Congratulations! Your guess of 6431 was correct! You solved this in 9 guesses.


## FutureBasic

include "NSLog.incl"
str15  guess, goal
short  x, y
cgRect wndrect

begin enum 1
_window
_bullLabel
_cowLabel
_horzLine
_vertLine
_newGameBtn
end enum

void local fn showStr( string as str15 )
short r
x = 20
for r = 1 to string
print %(x,y)chr$( string[r] ); x += 39 next end fn void local fn NewGame str15 ch goal = "" : guess = "" :y = 20 window _window,,wndRect text ,,fn colorRed cls fn showStr( "????" ) do ch = chr$(rnd(9) or _"0")
if instr$(0, goal, ch) == 0 then goal += ch until goal == 4 nslog(@"%u",val&(goal)) //unrem for testing y += 48 end fn local fn SetWindowFrame CGRect r = fn WindowContentRect( _window ) r.size.height += 32 r.origin.y -= 32 window _window,,r if ( r.origin.y < 150 ) alert _alert,, @"Too many guesses!",, @"Give up", YES fn newGame end if end fn local fn play( ch as str15 ) short r, bulls = 0, cows = 0 if instr$(0, guess, ch) then exit fn
guess += ch
text,,fn colorDarkGray
fn showStr( guess )
if guess < 4 then exit fn

for r = 1 to 4
if goal[r] == guess[r] then bulls++ : continue
if instr$(0, goal, chr$(guess[r]) ) then cows++
next

select
case bulls == 4
text ,,fn colorRed
print %(x + 31, y)("W I N!")
y = 20 : fn showStr( goal )
case else : print %(x + 35, y)bulls;"   "; cows
y += 32 : guess = ""
end select
fn SetWindowFrame
end fn

void local fn BuildWindow
wndrect = = fn WindowContentRect( _window )
textlabel _bullLabel, @"🐂", (198,59,38,40)
textlabel _cowLabel, @"🐄", (255,59,38,40)
ControlSetFontWithName( _bullLabel, NULL, 30 )
ControlSetFontWithName( _cowLabel, NULL, 30 )
box _horzLine,, (12,50,287,5), NSBoxSeparator
box _vertLine,, (180,12,5,90), NSBoxSeparator
button _newGameBtn,,, @"New Game", (198,13,100,32)
text @"menlo bold",24,,fn ColorWindowBackground
end fn

void local fn DoDialog( evt as long, tag as long )
select ( evt )
case _windowKeyDown  //: stop
short ch = intval( fn EventCharacters )
if ch then fn play( chr$( ch or _"0" ) ):DialogEventSetBool(YES) case _btnClick : fn NewGame case _windowWillClose : end end select end fn on dialog fn DoDialog fn buildWindow fn newGame HandleEvents Output: ## Go package main import ( "bufio" "bytes" "fmt" "math/rand" "os" "strings" "time" ) func main() { fmt.Println(Cows and Bulls Guess four digit number of unique digits in the range 1 to 9. A correct digit but not in the correct place is a cow. A correct digit in the correct place is a bull.) // generate pattern pat := make([]byte, 4) rand.Seed(time.Now().Unix()) r := rand.Perm(9) for i := range pat { pat[i] = '1' + byte(r[i]) } // accept and score guesses valid := []byte("123456789") guess: for in := bufio.NewReader(os.Stdin); ; { fmt.Print("Guess: ") guess, err := in.ReadString('\n') if err != nil { fmt.Println("\nSo, bye.") return } guess = strings.TrimSpace(guess) if len(guess) != 4 { // malformed: not four characters fmt.Println("Please guess a four digit number.") continue } var cows, bulls int for ig, cg := range guess { if strings.IndexRune(guess[:ig], cg) >= 0 { // malformed: repeated digit fmt.Printf("Repeated digit: %c\n", cg) continue guess } switch bytes.IndexByte(pat, byte(cg)) { case -1: if bytes.IndexByte(valid, byte(cg)) == -1 { // malformed: not a digit fmt.Printf("Invalid digit: %c\n", cg) continue guess } default: // I just think cows should go first cows++ case ig: bulls++ } } fmt.Printf("Cows: %d, bulls: %d\n", cows, bulls) if bulls == 4 { fmt.Println("You got it.") return } } }  ## Golo #!/usr/bin/env golosh ---- This module is the Bulls and Cows game. ---- module Bullsandcows import gololang.Decorators import gololang.Functions import gololang.IO import java.util function main = |args| { while true { let secret = create4RandomNumbers() println("Welcome to Bulls And Cows") while true { println("Please enter a 4 digit number") println("(with only the digits 1 to 9 and no repeated digits, for example 2537)") let guess = readln("guess: ") let result = validateGuess(guess) if result: isValid() { let bulls, cows = bullsAndOrCows(result: digits(), secret) if bulls is 4 { println("You win!") break } println("bulls: " + bulls) println("cows: " + cows) } else { println(result: message()) } } } } function create4RandomNumbers = { let numbers = vector[1, 2, 3, 4, 5, 6, 7, 8, 9] Collections.shuffle(numbers) let shuffled = numbers: subList(0, 4) return shuffled } union Result = { Valid = { digits } Invalid = { message } } @checkArguments(isString()) function validateGuess = |guess| { var digits = [] try { let number = guess: toInt() digits = number: digits() if digits: exists(|d| -> d is 0) { return Result.Invalid("No zeroes please") } if digits: size() isnt 4 { return Result.Invalid("Four digits please") } let digitSet = set[ digit foreach digit in digits ] if digitSet: size() < digits: size() { return Result.Invalid("No duplicate numbers please") } } catch(e) { return Result.Invalid("Numbers only please") } return Result.Valid(digits) } let is4Vector = |arg| -> arg oftype java.util.List.class and arg: size() is 4 @checkArguments(is4Vector, is4Vector) function bullsAndOrCows = |guess, secret| { var bulls = 0 var cows = 0 foreach i in [0..4] { let guessNum = guess: get(i) let secretNum = secret: get(i) if guessNum is secretNum { bulls = bulls + 1 } else if secret: exists(|num| -> guessNum is num) { cows = cows + 1 } } return [bulls, cows] } augment java.lang.Integer { function digits = |this| { var remaining = this let digits = vector[] while remaining > 0 { digits: prepend(remaining % 10) remaining = remaining / 10 } return digits } }  ## Groovy class BullsAndCows { static void main(args) { def inputReader = System.in.newReader() def numberGenerator = new Random() def targetValue while (targetValueIsInvalid(targetValue = numberGenerator.nextInt(9000) + 1000)) continue def targetStr = targetValue.toString() def guessed = false def guesses = 0 while (!guessed) { def bulls = 0, cows = 0 print 'Guess a 4-digit number with no duplicate digits: ' def guess = inputReader.readLine() if (guess.length() != 4 || !guess.isInteger() || targetValueIsInvalid(guess.toInteger())) { continue } guesses++ 4.times { if (targetStr[it] == guess[it]) { bulls++ } else if (targetStr.contains(guess[it])) { cows++ } } if (bulls == 4) { guessed = true } else { println "$cows Cows and $bulls Bulls." } } println "You won after$guesses guesses!"
}

static targetValueIsInvalid(value) {
def digitList = []
while (value > 0) {
if (digitList[value % 10] == 0 || digitList[value % 10]) {
return true
}
digitList[value % 10] = true
value = value.intdiv(10)
}
false
}
}


import Data.List (partition, intersect, nub)
import System.Random (StdGen, getStdRandom, randomR)
import Text.Printf

numberOfDigits = 4 :: Int

main = bullsAndCows

bullsAndCows :: IO ()
bullsAndCows = do
digits <- getStdRandom $pick numberOfDigits ['1' .. '9'] putStrLn "Guess away!" loop digits where loop digits = do input <- getLine if okay input then let (bulls, cows) = score digits input in if bulls == numberOfDigits then putStrLn "You win!" else do printf "%d bulls, %d cows.\n" bulls cows loop digits else do putStrLn "Malformed guess; try again." loop digits okay :: String -> Bool okay input = length input == numberOfDigits && input == nub input && all legalchar input where legalchar c = '1' <= c && c <= '9' score :: String -> String -> (Int, Int) score secret guess = (length bulls, cows) where (bulls, nonbulls) = partition (uncurry (==))$
zip secret guess
cows = length $uncurry intersect$ unzip nonbulls

pick :: Int -> [a] -> StdGen -> ([a], StdGen)
{- Randomly selects items from a list without replacement. -}
pick n l g = f n l g (length l - 1) []
where  f 0 _ g _   ps = (ps, g)
f n l g max ps =
f (n - 1) (left ++ right) g' (max - 1) (picked : ps)
where (i, g') = randomR (0, max) g
(left, picked : right) = splitAt i l


## Hy

(import random)

(def +size+ 4)
(def +digits+ "123456789")
(def +secret+ (random.sample +digits+ +size+))

(while True
(while True
(setv guess (list (distinct (raw-input "Enter a guess: "))))
(when (and
(= (len guess) +size+)
(all (map (fn [c] (in c +digits+)) guess)))
(break))
(print "Malformed guess; try again"))
(setv bulls 0)
(setv cows 0)
(for [i (range +size+)] (cond
[(= (get guess i) (get +secret+ i)) (setv bulls (inc bulls))]
[(in (get guess i) +secret+) (setv cows (inc cows))]))
(when (= bulls +size+)
(break))
(print (.format "{} bull{}, {} cows"
bulls (if (= bulls 1) "" "s")
cows (if (= cows 1) "" "s"))))

(print "A winner is you!")


## Icon and Unicon

The following works in both Icon and Unicon.

procedure main()
digits := "123456789"
every !digits :=: ?digits
num := digits[1+:4]
repeat if score(num, getGuess(num)) then break
write("Good job.")
end

procedure getGuess(num)
repeat {
writes("Enter a guess: ")
if *(guess ** '123456789') == *num then return guess
write("Malformed guess: ",guess,". Try again.")
}
end

procedure score(num, guess)
bulls := 0
cows := *(num ** guess)
every (num[i := 1 to *num] == guess[i], bulls +:= 1, cows -:= 1)
write("\t",bulls," bulls and ",cows," cows")
return (bulls = *num)
end


## J

require 'misc'

plural=: conjunction define
(":m),' ',n,'s'#~1~:m
)

number=. 1+4?9
whilst. -.guess-:number do.
guess=. 0 "."0 prompt 'Guess my number: '
if. (4~:#guess)+.(4~:#~.guess)+.0 e.guess e.1+i.9 do.
if. 0=#guess do.
smoutput 'Giving up.'
return.
end.
smoutput 'Guesses must be four different non-zero digits'
continue.
end.
bulls=. +/guess=number
cows=. (+/guess e.number)-bulls
smoutput bulls plural 'bull',' and ',cows plural 'cow','.'
end.
smoutput 'you win'
)


For example:

   bullcow''
Guess my number: 1234
0 bulls and 1 cow.
Guess my number: 5678
3 bulls and 0 cows.
Guess my number: 2349
0 bulls and 0 cows.
Guess my number: 1567
0 bulls and 3 cows.
Guess my number: 6178
3 bulls and 0 cows.
Guess my number: 6157
1 bull and 2 cows.
Guess my number: 5178
4 bulls and 0 cows.
you win


## Java

import java.util.InputMismatchException;
import java.util.Random;
import java.util.Scanner;

public class BullsAndCows{
public static void main(String[] args){
Random gen= new Random();
int target;
while(hasDupes(target= (gen.nextInt(9000) + 1000)));
String targetStr = target +"";
boolean guessed = false;
Scanner input = new Scanner(System.in);
int guesses = 0;
do{
int bulls = 0;
int cows = 0;
System.out.print("Guess a 4-digit number with no duplicate digits: ");
int guess;
try{
guess = input.nextInt();
if(hasDupes(guess) || guess < 1000) continue;
}catch(InputMismatchException e){
continue;
}
guesses++;
String guessStr = guess + "";
for(int i= 0;i < 4;i++){
if(guessStr.charAt(i) == targetStr.charAt(i)){
bulls++;
}else if(targetStr.contains(guessStr.charAt(i)+"")){
cows++;
}
}
if(bulls == 4){
guessed = true;
}else{
System.out.println(cows+" Cows and "+bulls+" Bulls.");
}
}while(!guessed);
System.out.println("You won after "+guesses+" guesses!");
}

public static boolean hasDupes(int num){
boolean[] digs = new boolean;
while(num > 0){
if(digs[num%10]) return true;
digs[num%10] = true;
num/= 10;
}
return false;
}
}

Output:

Guess a 4-digit number with no duplicate digits: 5834
2 Cows and 0 Bulls.
Guess a 4-digit number with no duplicate digits: 1234
1 Cows and 0 Bulls.
Guess a 4-digit number with no duplicate digits: 4321
1 Cows and 0 Bulls.
Guess a 4-digit number with no duplicate digits: 3421
0 Cows and 1 Bulls.
Guess a 4-digit number with no duplicate digits: 8412
0 Cows and 0 Bulls.
Guess a 4-digit number with no duplicate digits: 3560
1 Cows and 1 Bulls.
Guess a 4-digit number with no duplicate digits: 3650
0 Cows and 2 Bulls.
Guess a 4-digit number with no duplicate digits: 3759
2 Cows and 2 Bulls.
Guess a 4-digit number with no duplicate digits: 3975
2 Cows and 2 Bulls.
Guess a 4-digit number with no duplicate digits: 3957
You won after 10 guesses!

## JavaScript

### Spidermonkey version

#!/usr/bin/env js

function main() {
var len = 4;
playBullsAndCows(len);
}

function playBullsAndCows(len) {
var num = pickNum(len);
// print('The secret number is:\n  ' + num.join('\n  '));
showInstructions(len);
var nGuesses = 0;
while (true) {
nGuesses++;
var guess = getGuess(nGuesses, len);
var census = countBovine(num, guess);
showScore(census.bulls, census.cows);
if (census.bulls == len) {
showFinalResult(nGuesses);
return;
}
}
}

function showScore(nBulls, nCows) {
print('    Bulls: ' + nBulls + ', cows: ' + nCows);
}

function showFinalResult(guesses) {
print('You win!!! Guesses needed: ' + guesses);
}

function countBovine(num, guess) {
var count = {bulls:0, cows:0};
var g = guess.join('');
for (var i = 0; i < num.length; i++) {
var digPresent = g.search(num[i]) != -1;
if (num[i] == guess[i]) count.bulls++;
else if (digPresent) count.cows++;
}
return count;
}

function getGuess(nGuesses, len) {
while (true) {
putstr('Your guess #' + nGuesses + ': ');
guess = String(parseInt(guess)).split('');
if (guess.length != len) {
print('  You must enter a ' + len + ' digit number.');
continue;
}
if (hasDups(guess)) {
print('  No digits can be duplicated.');
continue;
}
return guess;
}
}

function hasDups(ary) {
var t = ary.concat().sort();
for (var i = 1; i < t.length; i++) {
if (t[i] == t[i-1]) return true;
}
return false;
}

function showInstructions(len) {
print();
print('Bulls and Cows Game');
print('-------------------');
print('  You must guess the ' + len + ' digit number I am thinking of.');
print('  The number is composed of the digits 1-9.');
print('  No digit appears more than once.');
print('  After each of your guesses, I will tell you:');
print('    The number of bulls (digits in right place)');
print('    The number of cows (correct digits, but in the wrong place)');
print();
}

function pickNum(len) {
var nums = [1, 2, 3, 4, 5, 6, 7, 8, 9];
nums.sort(function(){return Math.random() - 0.5});
return nums.slice(0, len);
}

main();


Example game (cheating!):

Bulls and Cows Game
-------------------
You must guess the 4 digit number I am thinking of.
The number is composed of the digits 1-9.
No digit appears more than once.
After each of your guesses, I will tell you:
The number of bulls (digits in right place)
The number of cows (correct digits, but in wrong place)

Bulls: 0, cows: 2
Bulls: 1, cows: 1
Bulls: 0, cows: 3
Bulls: 1, cows: 1
Bulls: 1, cows: 3
Bulls: 2, cows: 2
Bulls: 2, cows: 2
Bulls: 4, cows: 0
You win! Guesses needed: 8


## jq

Works with: jq

Also works with gojq, the Go implementation of jq.

The following program reads the user's input from STDIN, and reads random digits from /dev/random using the --slurpfile command-line option. This makes the program more convoluted than would have been the case had the generation of the initial four-digit pseudo-random integer been done in a separate step, but it does illustrate how the limitations of jq's I/O can be circumvented in this case.

In a bash or bash-like environment, a suitable invocation would be as follows:

jq -nrR --slurpfile raw <(< /dev/random tr -cd '0-9' | fold -w 1 | head -n 100) -f bc.jq


bc.jq

# A PRNG for generating a pseudo-random integer in range(0; .).
# $array must be a sufficiently large array of pseudo-random integers in range(0;10). #$start specifies the position in $array to begin searching. # Output: {prn, start) where .prn is a PRN in range(0; .) and .start is the corresponding position in$array.
def prn($array;$start):
def a2n: map(tostring) | join("") | tonumber;
if . == 1 then 0
else . as $n | (($n-1)|tostring|length) as $w | {$start}
| until( $array[.start: .start +$w] | a2n < $n; .start+=1 ) | {start, prn: ($raw[.start: .start + $w] | a2n)} end; # Generate a 4-digit PRN from 1234 to 9876 inclusive, with no zeros or repeated digits. # Global variable:$raw (see documentation for $array above) def num: def _num($start):
(8643|prn($raw;$start)) as $prn | (1234 +$prn.prn)
| . as $n | tostring | if (test("0")|not) and ((explode|unique|length) == 4) then$n
else _num($prn.start+4) end; _num(0); def MAX_GUESSES: 20; # say def instructions: "All guesses should have exactly 4 distinct digits excluding zero.", "Keep guessing until you guess the chosen number (maximum \(MAX_GUESSES) valid guesses).\n"; def play: num as$num
| ($num|tostring|explode) as$numArray
| { guesses: 0 }
(label $out | foreach range(0; infinite) as$i (.;
if .bulls == 4 or .guesses == MAX_GUESSES then break $out else .guess = input | if .guess ==$num then .emit = "You have won with \(.guesses+1) valid guesses!"
else .n = (.guess | try tonumber catch null)
| if .n == null               then .emit = "Not a valid number"
elif .guess|test("[+-.]")   then .emit = "The guess should not contain a sign or decimal point."
elif .guess|test("0")       then .emit = "The guess cannot contain zero."
elif .guess|length != 4     then .emit = "The guess must have exactly 4 digits."
else .guessArray = (.guess | explode )
| if .guessArray | unique | length < 4 then .emit = "All digits must be distinct."
else . + {bulls: 0, cows: 0 }
| reduce range(0; .guessArray|length) as $i ( .; if$numArray[$i] == .guessArray[$i]      then .bulls += 1
elif (.guessArray[$i] | IN($numArray[])) then .cows  += 1
else .
end)
| .emit = "Your score for this guess:  Bulls = \(.bulls)  Cows = \(.cows)"
| .guesses += 1
end
end
end
end;

select(.emit).emit,
if .bulls == 4 then "Congratulations!"
elif .guesses == MAX_GUESSES
then "\nYou have now had \(.guesses) valid guesses, the maximum allowed. Bye!"
end ) );

play

## Julia

function cowsbulls()
print("Welcome to Cows & Bulls! I've picked a number with unique digits between 1 and 9, go ahead and type your guess.\n
You get one bull for every right number in the right position.\n
You get one cow for every right number, but in the wrong position.\n
Enter 'n' to pick a new number and 'q' to quit.\n>")
function new_number()
s = [1:9]
n = ""
for i = 9:-1:6
n *= string(delete!(s,rand(1:i)))
end
return n
end
while true
input == "q" && break
if input == "n"
print("\nI've picked a new number, go ahead and guess\n>")
continue
end
!ismatch(r"^[1-9]{4}$",input) && (print("Invalid guess: Please enter a 4-digit number\n>"); continue) if input == answer print("\nYou're right! Good guessing!\nEnter 'n' for a new number or 'q' to quit\n>") else bulls = sum(answer.data .== input.data) cows = sum([answer[x] != input[x] && contains(input.data,answer[x]) for x = 1:4]) print("\nNot quite! Your guess is worth:\n$bulls Bulls\n$cows Cows\nPlease guess again\n\n>") end end end  The following version checks thoroughly that the input of the player is constituted of four distincts digits. function bullsandcows () bulls = cows = turns = 0 result = (s = [] ; while length(unique(s))<4 push!(s,rand('1':'9')) end; unique(s)) println("A game of bulls and cows!") while (bulls != 4) print("Your guess? ") guess = collect(chomp(readline(STDIN))) if ! (length(unique(guess)) == length(guess) == 4 && all(isdigit,guess)) println("please, enter four distincts digits") continue end bulls = sum(map(==, guess, result)) cows = length(intersect(guess,result)) - bulls println("$bulls bulls and $cows cows!") ; turns += 1 end println("You win! You succeeded in$turns guesses.")
end

Output:
julia> bullsandcows()
A game of bulls and cows!
0 bulls and 2 cows!
1 bulls and 1 cows!
Your guess? 

## Kotlin

// version 1.1.2

import java.util.Random

const val MAX_GUESSES = 20  // say

fun main(args: Array<String>) {
val r = Random()
var num: String
// generate a 4 digit random number from 1234 to 9876 with no zeros or repeated digits
do {
num = (1234 + r.nextInt(8643)).toString()
} while ('0' in num || num.toSet().size < 4)

println("All guesses should have exactly 4 distinct digits excluding zero.")
println("Keep guessing until you guess the chosen number (maximum $MAX_GUESSES valid guesses).\n") var guesses = 0 while (true) { print("Enter your guess : ") val guess = readLine()!! if (guess == num) { println("You've won with${++guesses} valid guesses!")
return
}
val n = guess.toIntOrNull()
if (n == null)
println("Not a valid number")
else if ('-' in guess || '+' in guess)
println("Can't contain a sign")
else if ('0' in guess)
println("Can't contain zero")
else if (guess.length != 4)
println("Must have exactly 4 digits")
else if (guess.toSet().size < 4)
println("All digits must be distinct")
else {
var bulls = 0
var cows  = 0
for ((i, c) in guess.withIndex()) {
if (num[i] == c) bulls++
else if (c in num) cows++
}
println("Your score for this guess:  Bulls = $bulls Cows =$cows")
guesses++
if (guesses == MAX_GUESSES)
println("You've now had $guesses valid guesses, the maximum allowed") } } }  Sample input/output: Output: Enter your guess : 1234 Your score for this guess: Bulls = 0 Cows = 2 Enter your guess : 1256 Your score for this guess: Bulls = 0 Cows = 2 Enter your guess : 2178 Your score for this guess: Bulls = 1 Cows = 0 Enter your guess : 2519 Your score for this guess: Bulls = 3 Cows = 0 Enter your guess : 2569 Your score for this guess: Bulls = 3 Cows = 0 Enter your guess : 2579 Your score for this guess: Bulls = 3 Cows = 0 Enter your guess : 2589 Your score for this guess: Bulls = 3 Cows = 0 Enter your guess : 2539 Your score for this guess: Bulls = 3 Cows = 0 Enter your guess : 2549 You've won with 9 valid guesses!  ## Lasso This game uses an HTML form to submit the answer. The random number and history are stored in a session using Lasso's built in session management. [ define randomizer() => { local(n = string) while(#n->size < 4) => { local(r = integer_random(1,9)->asString) #n !>> #r ? #n->append(#r) } return #n } define cowbullchecker(n::string,a::string) => { integer(#n) == integer(#a) ? return (:true,map('cows'=0,'bulls'=4,'choice'=#a)) local(cowbull = map('cows'=0,'bulls'=0,'choice'=#a),'checked' = array) loop(4) => { if(#checked !>> integer(#a->values->get(loop_count))) => { #checked->insert(integer(#a->values->get(loop_count))) if(integer(#n->values->get(loop_count)) == integer(#a->values->get(loop_count))) => { #cowbull->find('bulls') += 1 else(#n->values >> #a->values->get(loop_count)) #cowbull->find('cows') += 1 } } } #cowbull->find('bulls') == 4 ? return (:true,map('cows'=0,'bulls'=4,'choice'=#a)) return (:true,#cowbull) } session_start('user') session_addvar('user', 'num') session_addvar('user', 'historic_choices') // set up rand var(num)->isNotA(::string) ? var(num = randomizer) var(historic_choices)->isNotA(::array) ? var(historic_choices = array) local(success = false) // check answer if(web_request->param('a')->asString->size) => { local(success,result) = cowbullchecker($num,web_request->param('a')->asString)
$historic_choices->insert(#result) } if(web_request->params->asStaticArray >> 'restart') => {$num = randomizer
$historic_choices = array } ] <h1>Bulls and Cows</h1> <p>Guess the 4-digit number...</p> <p>Your win if the guess is the same as the randomly chosen number.<br> - A score of one bull is accumulated for each digit in your guess that equals the corresponding digit in the randomly chosen initial number.<br> - A score of one cow is accumulated for each digit in your guess that also appears in the randomly chosen number, but in the wrong position. </p> [ local(win = false) if($historic_choices->size) => {
with c in $historic_choices do => {^ '<p>'+#c->find('choice')+': Bulls: '+#c->find('bulls')+', Cows: '+#c->find('cows') if(#c->find('bulls') == 4) => {^ ' - YOU WIN!' #win = true ^} '</p>' ^} } if(not #win) => {^ ] <form action="?" method="post"> <input name="a" value="[web_request->param('a')->asString]" size="5"> <input type="submit" name="guess"> <a href="?restart">Restart</a> </form> [else '<a href="?restart">Restart</a>' ^}]  Output: Game in progress: Bulls and Cows Guess the 4-digit number... Your win if the guess is the same as the randomly chosen number. - A score of one bull is accumulated for each digit in your guess that equals the corresponding digit in the randomly chosen initial number. - A score of one cow is accumulated for each digit in your guess that also appears in the randomly chosen number, but in the wrong position. 4567: Bulls: 0, Cows: 1 4567: Bulls: 0, Cows: 1 (input box) (submit button) Restart Output: Game in to completion: Bulls and Cows Guess the 4-digit number... Your win if the guess is the same as the randomly chosen number. - A score of one bull is accumulated for each digit in your guess that equals the corresponding digit in the randomly chosen initial number. - A score of one cow is accumulated for each digit in your guess that also appears in the randomly chosen number, but in the wrong position. 1234: Bulls: 0, Cows: 2 1256: Bulls: 0, Cows: 1 1789: Bulls: 0, Cows: 1 1222: Bulls: 0, Cows: 0 3456: Bulls: 1, Cows: 2 3564: Bulls: 0, Cows: 3 3567: Bulls: 0, Cows: 2 8564: Bulls: 0, Cows: 2 3564: Bulls: 0, Cows: 3 4365: Bulls: 0, Cows: 3 5436: Bulls: 2, Cows: 1 5478: Bulls: 2, Cows: 0 5463: Bulls: 3, Cows: 0 5468: Bulls: 2, Cows: 0 5493: Bulls: 4, Cows: 0 - YOU WIN! Restart ## Liberty BASIC  do while len( secret$) <4
c$=chr$( int( rnd( 1) *9) +49)
if not( instr( secret$, c$)) then secret$=secret$ +c$loop print " Secret number has been guessed.... "; secret$

guesses  =   0

[loop]
input " "; guess$guesses = guesses +1 r$       =score$( guess$, secret$) bulls =val( word$( r$, 1, ",")) cows =val( word$( r$, 2, ",")) print " Result: "; bulls; " bulls, and "; cows; " cows" print if guess$ =secret$then print " You won after "; guesses; " guesses!" print " You guessed it in "; guesses print " Thanks for playing!" wait end if goto [loop] end ' _____________________________________________________________ function check( i$) '   check =0 if no digit repeats, else =1
check =0
for i =1 to 3
for j =i +1 to 4
if mid$( i$, i, 1) =mid$( i$, j, 1) then check =1
next j
next i
end function

function score$( a$, b$) ' return as a csv string the number of bulls & cows. bulls = 0: cows = 0 for i = 1 to 4 c$ = mid$( a$, i, 1)
if mid$( b$, i, 1) = c$then bulls = bulls + 1 else if instr( b$, c$) <>0 and instr( b$, c$) <>i then cows = cows + 1 end if end if next i score$ =str$( bulls); ","; str$( cows)
end function

[quit]
close #w
end

## Logo

Works with: UCB Logo
to ok? :n
output (and [number? :n] [4 = count :n] [4 = count remdup :n] [not member? 0 :n])
end

to init
do.until [make "hidden random 10000] [ok? :hidden]
end

to guess :n
if not ok? :n [print [Bad guess! (4 unique digits, 1-9)]  stop]
localmake "bulls 0
localmake "cows  0
foreach :n [cond [
[[? = item # :hidden] make "bulls 1 + :bulls]
[[member?  ? :hidden] make "cows  1 + :cows ]
]]
(print :bulls "bulls, :cows "cows)
if :bulls = 4 [print [You guessed it!]]
end

## Lua

function ShuffleArray(array)
for i=1,#array-1 do
local t = math.random(i, #array)
array[i], array[t] = array[t], array[i]
end
end

function GenerateNumber()
local digits = {1,2,3,4,5,6,7,8,9}

ShuffleArray(digits)

return digits * 1000 +
digits *  100 +
digits *   10 +
digits
end

function IsMalformed(input)
local malformed = false

if #input == 4 then
for i=1,4 do
local digit = input:byte(i) - string.byte('0')
if digit < 1 or digit > 9 or already_used[digit] then
malformed = true
break
end
end
else
malformed = true
end

return malformed
end

math.randomseed(os.time())
math.randomseed(math.random(2^31-1)) -- since os.time() only returns seconds

print("\nWelcome to Bulls and Cows!")
print("")
print("The object of this game is to guess the random 4-digit number that the")
print("computer has chosen. The number is generated using only the digits 1-9,")
print("with no repeated digits. Each time you enter a guess, you will score one")
print("\"bull\" for each digit in your guess that matches the corresponding digit")
print("in the computer-generated number, and you will score one \"cow\" for each")
print("digit in your guess that appears in the computer-generated number, but is")
print("in the wrong position. Use this information to refine your guesses. When")
print("you guess the correct number, you win.");
print("")

quit = false

repeat
magic_number = GenerateNumber()
magic_string = tostring(magic_number) -- Easier to do scoring with a string
repeat
io.write("\nEnter your guess (or 'Q' to quit): ")
if user_input == 'Q' or user_input == 'q' then
quit = true
break
end

if not IsMalformed(user_input) then
if user_input == magic_string then
print("YOU WIN!!!")
else
local bulls, cows = 0, 0
for i=1,#user_input do
local find_result = magic_string:find(user_input:sub(i,i))

if find_result and find_result == i then
bulls = bulls + 1
elseif find_result then
cows = cows + 1
end
end
print(string.format("You scored %d bulls, %d cows", bulls, cows))
end
else
print("Malformed input. You must enter a 4-digit number with")
print("no repeated digits, using only the digits 1-9.")
end

until user_input == magic_string

if not quit then
io.write("\nPress <Enter> to play again or 'Q' to quit: ")
if user_input == 'Q' or user_input == 'q' then
quit = true
end
end

if quit then
print("\nGoodbye!")
end
until quit


Another version:

function createNewNumber ()
math.randomseed(os.time())
local numbers = {1, 2, 3, 4, 5, 6, 7, 8, 9}
local tNumb = {} -- list of numbers
for i = 1, 4 do
table.insert(tNumb, math.random(#tNumb+1), table.remove(numbers, math.random(#numbers)))
end
return tNumb
end

TNumber = createNewNumber ()
print ('(right number: ' .. table.concat (TNumber) .. ')')

function isValueInList (value, list)
for i, v in ipairs (list) do
if v == value then return true end
end
return false
end

local nGuesses = 0

while not GameOver do
nGuesses = nGuesses + 1
print("Enter your guess (or 'q' to quit): ")
local input
while not input do
end
if input == "q" then
GameOver = true
return
end
local tInput = {}
for i=1, string.len(input) do
local number = tonumber(string.sub(input,i,i))
if number and not isValueInList (number, tInput) then
table.insert (tInput, number)
end
end
local malformed = false
if not (string.len(input) == 4) or not (#tInput == 4) then
print (nGuesses, 'bad input: too short or too long')
malformed = true
end

if not malformed then
print (nGuesses, 'parsed input:', table.concat(tInput, ', '))
local nBulls, nCows = 0, 0
for i, number in ipairs (tInput) do
if TNumber[i] == number then
nBulls = nBulls + 1
elseif isValueInList (number, TNumber) then
nCows = nCows + 1
end
end
print (nGuesses, 'Bulls: '.. nBulls .. ' Cows: ' .. nCows)
if nBulls == 4 then
print (nGuesses, 'Win!')
GameOver = true
end
end
end


## M2000 Interpreter

Module Game {
Malformed=lambda (a$)->{ =true if len(a$)<>4 then exit
n=0 : dummy=val(a$,"int",n) if n<>5 or dummy=0 then exit for i=1 to 9 if len(filter$(a$,str$(i,0)))<3 then break
next i
=false
}
BullsAndCows$=lambda$ (a$, b$, &ok) ->{
Def b, c
for i=1 to 4
if mid$(a$,i,1)=mid$(b$,i,1) then
b++
else.if instr(b$,mid$(a$,i,1))>0 then c++ end if next i ok=b=4 =format$("bulls {0}, cows {1}", b, c)
}
Random$=lambda$ ->{
def repl$, bank$, c$bank$="123456789"
for i=1 to 4
c$=mid$(bank$,random(1,len(bank$)),1)
bank$=filter$(bank$, c$)
repl$+=c$
next i
=repl$} target$=Random$() def boolean win=false, a$
do
do
Input "Next guess ";a%
a$=str$(a%,0)
if Malformed(a$) then Print "Malformed input, try again" else exit always Print BullsAndCows$(a$, target$, &win)
if win then exit
Print "Bad guess! (4 unique digits, 1-9)"
always
Print "You guess it"
}
Game

## Maple

BC := proc(n) #where n is the number of turns the user wishes to play before they quit
local target, win, numGuesses, guess, bulls, cows, i, err;
target := [0, 0, 0, 0]:
randomize(); #This is a command that makes sure that the numbers are truly randomized each time, otherwise your first time will always give the same result.
while member(0, target) or numelems({op(target)}) < 4 do #loop continues to generate random numbers until you get one with no repeating digits or 0s
target := [seq(parse(i), i in convert(rand(1234..9876)(), string))]: #a list of random numbers
end do:

win := false:
numGuesses := 0:
while win = false and numGuesses < n do #loop allows the user to play until they win or until a set amount of turns have passed
err := true;
while err do #loop asks for values until user enters a valid number
printf("Please enter a 4 digit integer with no repeating digits\n");
try#catches any errors in user input
guess := [seq(parse(i), i in readline())];
if hastype(guess, 'Not(numeric)', 'exclude_container') then
printf("Postive integers only! Please guess again.\n\n");
elif numelems(guess) <> 4 then
printf("4 digit numbers only! Please guess again.\n\n");
elif numelems({op(guess)}) < 4 then
printf("No repeating digits! Please guess again.\n\n");
elif member(0, guess) then
else
err := false;
end if;
catch:
end try;
end do:
numGuesses := numGuesses + 1;
printf("Guess %a: %a\n", numGuesses, guess);
bulls := 0;
cows := 0;
for i to 4 do #loop checks for bulls and cows in the user's guess
if target[i] = guess[i] then
bulls := bulls + 1;
elif member(target[i], guess) then
cows := cows + 1;
end if;
end do;
if bulls = 4 then
win := true;
printf("The number was %a.\n", target);
printf(StringTools[FormatMessage]("You won with %1 %{1|guesses|guess|guesses}.", numGuesses));
else
printf(StringTools[FormatMessage]("%1 %{1|Cows|Cow|Cows}, %2 %{2|Bulls|Bull|Bulls}.\n\n", cows, bulls));
end if;
end do:
if win = false and numGuesses >= n then
printf("You lost! The number was %a.\n", target);
end if;
return NULL;
end proc:
Output:
Please enter a 4 digit integer with no repeating digits
Guess 1: [1, 2, 3, 4]
1 Cow, 1 Bull.

Please enter a 4 digit integer with no repeating digits
Guess 2: [2, 3, 4, 5]
0 Cows, 1 Bull.

...


## Mathematica/Wolfram Language

digits=Last@FixedPointList[If[Length@Union@#==4,#,Table[Random[Integer,{1,9}],{4}]]&,{}]
codes=ToCharacterCode[StringJoin[ToString/@digits]];
Module[{r,bulls,cows},
While[True,
r=InputString[];
If[r===$Canceled,Break[], With[{userCodes=ToCharacterCode@r}, If[userCodes===codes,Print[r<>": You got it!"];Break[], If[Length@userCodes==Length@codes, bulls=Count[userCodes-codes,0];cows=Length@Intersection[codes,userCodes]-bulls; Print[r<>": "<>ToString[bulls]<>"bull(s), "<>ToString@cows<>"cow(s)."], Print["Guess four digits."]]]]]]]  Output: {8, 2, 6, 1} 3432: 0 bull(s), 1 cow(s). Illegal input. 8261: You got it! ## MATLAB function BullsAndCows % Plays the game Bulls and Cows as the "game master" % Create a secret number nDigits = 4; lowVal = 1; highVal = 9; digitList = lowVal:highVal; secret = zeros(1, 4); for k = 1:nDigits idx = randi(length(digitList)); secret(k) = digitList(idx); digitList(idx) = []; end % Give game information fprintf('Welcome to Bulls and Cows!\n') fprintf('Try to guess the %d-digit number (no repeated digits).\n', nDigits) fprintf('Digits are between %d and %d (inclusive).\n', lowVal, highVal) fprintf('Score: 1 Bull per correct digit in correct place.\n') fprintf(' 1 Cow per correct digit in incorrect place.\n') fprintf('The number has been chosen. Now it''s your moooooove!\n') gs = input('Guess: ', 's'); % Loop until user guesses right or quits (no guess) nGuesses = 1; while gs gn = str2double(gs); if isnan(gn) || length(gn) > 1 % Not a scalar fprintf('Malformed guess. Keep to valid scalars.\n') gs = input('Try again: ', 's'); else g = sprintf('%d', gn) - '0'; if length(g) ~= nDigits || any(g < lowVal) || any(g > highVal) || ... length(unique(g)) ~= nDigits % Invalid number for game fprintf('Malformed guess. Remember:\n') fprintf(' %d digits\n', nDigits) fprintf(' Between %d and %d inclusive\n', lowVal, highVal) fprintf(' No repeated digits\n') gs = input('Try again: ', 's'); else score = CountBullsCows(g, secret); if score(1) == nDigits fprintf('You win! Bully for you! Only %d guesses.\n', nGuesses) gs = ''; else fprintf('Score: %d Bulls, %d Cows\n', score) gs = input('Guess: ', 's'); end end end nGuesses = nGuesses+1; % Counts malformed guesses end end function score = CountBullsCows(guess, correct) % Checks the guessed array of digits against the correct array to find the score % Assumes arrays of same length and valid numbers bulls = guess == correct; cows = ismember(guess(~bulls), correct); score = [sum(bulls) sum(cows)]; end  Output: Welcome to Bulls and Cows! Try to guess the 4-digit number (no repeated digits). Digits are between 1 and 9 (inclusive). Score: 1 Bull per correct digit in correct place. 1 Cow per correct digit in incorrect place. The number has been chosen. Now it's your moooooove! Guess: 1234 Score: 0 Bulls, 2 Cows Guess: 2156 Score: 0 Bulls, 1 Cows Guess: 7819 Score: 0 Bulls, 1 Cows Guess: 3457 Score: 0 Bulls, 2 Cows Guess: hello Malformed guess. Keep to valid scalars. Try again: 1123 Malformed guess. Remember: 4 digits Between 1 and 9 inclusive No repeated digits Try again: 34567 Malformed guess. Remember: 4 digits Between 1 and 9 inclusive No repeated digits Try again: 4368 You win! Bully for you! Only 8 guesses. ## MAXScript numCount = 4 -- number of digits to use digits = #(1, 2, 3, 4, 5, 6, 7, 8, 9) num = "" while num.count < numCount and digits.count > 0 do ( local r = random 1 digits.count append num (digits[r] as string) deleteitem digits r ) digits = undefined numGuesses = 0 inf = "Rules: \n1. Choose only % unique digits in any combination"+\ " (0 can't be used).\n2. Only positive integers are allowed."+\ "\n3. For each digit that is in it's place, you get a bull,\n"+\ "\tand for each digit that is not in it's place, you get a cow."+\ "\n4. The game is won when your number matches the number I chose."+\ "\n\nPress [esc] to quit the game.\n\n" clearlistener() format inf num.count while not keyboard.escpressed do ( local userVal = getkbvalue prompt:"\nEnter your number: " if (userVal as string) == num do ( format "\nCorrect! The number is %. It took you % moves.\n" num numGuesses exit with OK ) local bulls = 0 local cows = 0 local badInput = false case of ( (classof userVal != integer): ( format "\nThe number must be a positive integer.\n" badInput = true ) ((userVal as string).count != num.count): ( format "\nThe number must have % digits.\n" num.count badInput = true ) ((makeuniquearray (for i in 1 to (userVal as string).count \ collect (userVal as string)[i])).count != (userVal as string).count): ( format "\nThe number can only have unique digits.\n" badInput = true ) ) if not badInput do ( userVal = userVal as string i = 1 while i <= userVal.count do ( for j = 1 to num.count do ( if userVal[i] == num[j] do ( if i == j then bulls += 1 else cows += 1 ) ) i += 1 ) numGuesses += 1 format "\nBulls: % Cows: %\n" bulls cows ) ) Output: OK Rules: 1. Choose only 4 unique digits in any combination (0 can't be used). 2. Only positive integers are allowed. 3. For each digit that is in it's place, you get a bull, and for each digit that is not in it's place, you get a cow. 4. The game is won when your number matches the number I chose. Press [esc] to quit the game. OK Enter your number: 2468 Bulls: 0 Cows: 2 Enter your number: 2448 The number can only have unique digits. Enter your number: 1357 Bulls: 0 Cows: 1  ## MiniScript secret = range(1,9) secret.shuffle secret = secret[:4].join("") while true guess = input("Your guess? ").split("") if guess.len != 4 then print "Please enter 4 numbers, with no spaces." continue end if bulls = 0 cows = 0 for i in guess.indexes if secret[i] == guess[i] then bulls = bulls + 1 else if secret.indexOf(guess[i]) != null then cows = cows + 1 end if end for if bulls == 4 then print "You got it! Great job!" break end if print "You score " + bulls + " bull" + "s"*(bulls!=1) + " and " + cows + " cow" + "s"*(cows!=1) + "." end while  Output: Your guess? 2385 You score 0 bulls and 2 cows. Your guess? 2323 You score 0 bulls and 2 cows. Your guess? 2211 You score 2 bulls and 1 cow. ... Your guess? 8542 You score 3 bulls and 0 cows. Your guess? 8642 You got it! Great job! ## MUMPS BullCow New bull,cow,guess,guessed,ii,number,pos,x Set number="",x=1234567890 For ii=1:1:4 Do . Set pos=$Random($Length(x))+1 . Set number=number_$Extract(x,pos)
. Set $Extract(x,pos)="" . Quit Write !,"The computer has selected a number that consists" Write !,"of four different digits." Write !!,"As you are guessing the number, ""bulls"" and ""cows""" Write !,"will be awarded: a ""bull"" for each digit that is" Write !,"placed in the correct position, and a ""cow"" for each" Write !,"digit that occurs in the number, but in a different place.",! Write !,"For a guess, enter 4 digits." Write !,"Any other input is interpreted as ""I give up"".",! Set guessed=0 For Do Quit:guessed . Write !,"Your guess: " Read guess If guess'?4n Set guessed=-1 Quit . Set (bull,cow)=0,x=guess . For ii=4:-1:1 If$Extract(x,ii)=$Extract(number,ii) Do . . Set bull=bull+1,$Extract(x,ii)=""
. . Quit
. For ii=1:1:$Length(x) Set:number[$Extract(x,ii) cow=cow+1
. Write !,"You guessed ",guess,". That earns you "
. If 'bull,'cow Write "neither bulls nor cows..." Quit
. If bull Write bull," bull" Write:bull>1 "s"
. If cow Write:bull " and " Write cow," cow" Write:cow>1 "s"
. Write "."
. If bull=4 Set guessed=1 Write !,"That's a perfect score."
. Quit
If guessed<0 Write !!,"The number was ",number,".",!
Quit
Do BullCow

The computer has selected a number that consists
of four different digits.

As you are guessing the number, "bulls" and "cows"
will be awarded: a "bull" for each digit that is
placed in the correct position, and a "cow" for each
digit that occurs in the number, but in a different place.

For a guess, enter 4 digits.
Any other input is interpreted as "I give up".

You guessed 1234. That earns you 1 cow.
You guessed 5678. That earns you 1 cow.
You guessed 9815. That earns you 1 cow.
You guessed 9824. That earns you 2 cows.
You guessed 9037. That earns you 1 bull and 2 cows.
You guessed 2789. That earns you 1 bull and 2 cows.
You guessed 2079. That earns you 1 bull and 3 cows.
You guessed 2709. That earns you 2 bulls and 2 cows.
You guessed 0729. That earns you 4 cows.
You guessed 2907. That earns you 4 bulls.
That's a perfect score.

## Nanoquery

Translation of: Python
import Nanoquery.Util; random = new(Random)

// a function to verify the user's input
def verify_digits(input)
global size
seen = ""

if len(input) != size
return false
else
for char in input
if not char in "0123456789"
return false
else if char in seen
return false
end

seen += char
end
end

return true
end

size = 4
chosen = ""
while len(chosen) < size
digit = random.getInt(8) + 1

if not str(digit) in chosen
chosen += str(digit)
end
end

println "I have chosen a number from 4 unique digits from 1 to 9 arranged in a random order."
println "You need to input a 4 digit, unique digit number as a guess at what I have chosen."

guesses = 1
won = false
while !won
print "\nNext guess [" + str(guesses) + "]: "
guess = input()

if !verify_digits(guess)
println "Problem, try again. You need to enter 4 unique digits from 1 to 9"
else
if guess = chosen
won = true
else
bulls = 0
cows = 0
for i in range(0, size - 1)
if guess[i] = chosen[i]
bulls += 1
else if guess[i] in chosen
cows += 1
end
end

println format("  %d Bulls\n  %d Cows", bulls, cows)
guesses += 1
end
end
end

println "\nCongratulations you guess correctly in " + guesses + " attempts"
Output:
I have chosen a number from 4 unique digits from 1 to 9 arranged in a random order.
You need to input a 4 digit, unique digit number as a guess at what I have chosen.

Next guess : 1234
1 Bulls
2 Cows

Next guess : 1324
0 Bulls
3 Cows

...

Next guess : 2534
2 Bulls
2 Cows

Next guess : 4532

Congratulations you guess correctly in 11 attempts

## Nim

Translation of: Python
import random, strutils, strformat, sequtils
randomize()

const
Digits = "123456789"
DigitSet = {Digits..Digits[^1]}
Size = 4

proc sample(s: string; n: Positive): string =
## Return a random sample of "n" characters extracted from string "s".
var s = s
s.shuffle()
result = s[0..<n]

proc plural(n: int): string =
if n > 1: "s" else: ""

let chosen = Digits.sample(Size)

echo &"I have chosen a number from {Size} unique digits from 1 to 9 arranged in a random order."
echo &"You need to input a {Size} digit, unique digit number as a guess at what I have chosen."

var guesses = 0
while true:
inc guesses
var guess = ""
while true:
stdout.write(&"\nNext guess {guesses}: ")
if guess.len == Size and allCharsInSet(guess, DigitSet) and guess.deduplicate.len == Size:
break
echo &"Problem, try again. You need to enter {Size} unique digits from 1 to 9."
if guess == chosen:
echo &"\nCongratulations! You guessed correctly in {guesses} attempts."
break
var bulls, cows = 0
for i in 0..<Size:
if guess[i] == chosen[i]: inc bulls
elif guess[i] in chosen: inc cows
echo &"  {bulls} Bull{plural(bulls)}\n  {cows} Cow{plural(cows)}"

Output:

Sample output:

I have chosen a number from 4 unique digits from 1 to 9 arranged in a random order.
You need to input a 4 digit, unique digit number as a guess at what I have chosen.

Next guess 1: 1234
2 Bulls
0 Cow

Next guess 2: 1256
1 Bull
0 Cow

Next guess 3: 2378
1 Bull
3 Cows

Next guess 4: 7238

Congratulations! You guessed correctly in 4 attempts.

## OCaml

let rec input () =
let s = read_line () in
try
if String.length s <> 4 then raise Exit;
String.iter (function
| '1'..'9' -> ()
| _ -> raise Exit
) s;
let t = [ s.; s.; s.; s. ] in
let _ = List.fold_left  (* reject entry with duplication *)
(fun ac b -> if List.mem b ac then raise Exit; (b::ac))
[] t in
List.map (fun c -> int_of_string (String.make 1 c)) t
with Exit ->
prerr_endline "That is an invalid entry. Please try again.";
input ()
;;

let print_score g t =
let bull = ref 0 in
List.iter2 (fun x y ->
if x = y then incr bull
) g t;
let cow = ref 0 in
List.iter (fun x ->
if List.mem x t then incr cow
) g;
cow := !cow - !bull;
Printf.printf "%d bulls, %d cows\n%!" !bull !cow
;;

let () =
Random.self_init ();
let rec mkgoal acc = function 4 -> acc
| i ->
let n = succ(Random.int 9) in
if List.mem n acc
then mkgoal acc i
else mkgoal (n::acc) (succ i)
in
let g = mkgoal [] 0 in
let found = ref false in
while not !found do
let t = input () in
if t = g
then found := true
else print_score g t
done;
print_endline "Congratulations you guessed correctly";
;;


## Oforth

: bullsAndCows
| numbers guess digits bulls cows |

ListBuffer new ->numbers
while(numbers size 4 <>) [ 9 rand dup numbers include ifFalse: [ numbers add ] else: [ drop ] ]

while(true) [
"Enter a number of 4 different digits between 1 and 9 : " print
digits asInteger isNull digits size 4 <> or ifTrue: [ "Number of four digits needed" println continue ]
digits map(#asDigit) ->guess

guess numbers zipWith(#==) occurrences(true) ->bulls
bulls 4 == ifTrue: [ "You won !" println return ]

guess filter(#[numbers include]) size bulls - ->cows
System.Out "Bulls = " << bulls << ", cows = " << cows << cr
] ;

## ooRexx

The solution at Rexx Version 2 is a valid ooRexx program.

## Oz

declare
proc {Main}
Solution = {PickNUnique 4 {List.number 1 9 1}}

proc {Loop}
Guess = {EnterGuess}
in
{System.showInfo
{Bulls Guess Solution}#" bulls and "#
{Cows Guess Solution}#" cows"}
if Guess \= Solution then {Loop} end
end
in
{Loop}
{System.showInfo "You have won!"}
end

fun {Bulls Xs Sol}
{Length {Filter {List.zip Xs Sol Value.'=='} Id}}
end

fun {Cows Xs Sol}
{Length {Intersection Xs Sol}}
end

local
class TextFile from Open.file Open.text end
StdIn = {New TextFile init(name:stdin)}
in
fun {EnterGuess}
try
{System.printInfo "Enter your guess (e.g. \"1234\"): "}
S = {StdIn getS($)} in %% verify {Length S} = 4 {All S Char.isDigit} = true {FD.distinct S} %% assert there is no duplicate digit %% convert from digits to numbers {Map S fun {$ D} D-&0 end}
catch _ then
{EnterGuess}
end
end
end

fun {PickNUnique N Xs}
{FoldL {MakeList N}
fun {$Z _} {Pick {Diff Xs Z}}|Z end nil} end fun {Pick Xs} {Nth Xs {OS.rand} mod {Length Xs} + 1} end fun {Diff Xs Ys} {FoldL Ys List.subtract Xs} end fun {Intersection Xs Ys} {Filter Xs fun {$ X} {Member X Ys} end}
end

fun {Id X} X end
in
{Main}

## PARI/GP

This simple implementation expects guesses in the form [a,b,c,d].

bc()={
my(u,v,bulls,cows);
while(#vecsort(v=vector(4,i,random(9)+1),,8)<4,);
while(bulls<4,
u=input();
if(type(u)!="t_VEC"|#u!=4,next);
bulls=sum(i=1,4,u[i]==v[i]);
cows=sum(i=1,4,sum(j=1,4,i!=j&v[i]==u[j]));
print("You have "bulls" bulls and "cows" cows")
)
};

## Pascal

Program BullCow;

{$mode objFPC} uses Math, SysUtils; type TFourDigit = array[1..4] of integer; Procedure WriteFourDigit(fd: TFourDigit); { Write out a TFourDigit with no line break following. } var i: integer; begin for i := 1 to 4 do begin Write(fd[i]); end; end; Function WellFormed(Tentative: TFourDigit): Boolean; { Does the TFourDigit avoid repeating digits? } var current, check: integer; begin Result := True; for current := 1 to 4 do begin for check := current + 1 to 4 do begin if Tentative[check] = Tentative[current] then begin Result := False; end; end; end; end; Function MakeNumber(): TFourDigit; { Make a random TFourDigit, keeping trying until it is well-formed. } var i: integer; begin for i := 1 to 4 do begin Result[i] := RandomRange(1, 9); end; if not WellFormed(Result) then begin Result := MakeNumber(); end; end; Function StrToFourDigit(s: string): TFourDigit; { Convert an (input) string to a TFourDigit. } var i: integer; begin for i := 1 to Length(s) do begin StrToFourDigit[i] := StrToInt(s[i]); end; end; Function Wins(Num, Guess: TFourDigit): Boolean; { Does the guess win? } var i: integer; begin Result := True; for i := 1 to 4 do begin if Num[i] <> Guess[i] then begin Result := False; Exit; end; end; end; Function GuessScore(Num, Guess: TFourDigit): string; { Represent the score of the current guess as a string. } var i, j, bulls, cows: integer; begin bulls := 0; cows := 0; { Count the cows and bulls. } for i := 1 to 4 do begin for j := 1 to 4 do begin if (Num[i] = Guess[j]) then begin { If the indices are the same, that would be a bull. } if (i = j) then begin bulls := bulls + 1; end else begin cows := cows + 1; end; end; end; end; { Format the result as a sentence. } Result := IntToStr(bulls) + ' bulls, ' + IntToStr(cows) + ' cows.'; end; Function GetGuess(): TFourDigit; { Get a well-formed user-supplied TFourDigit guess. } var input: string; begin WriteLn('Enter a guess:'); ReadLn(input); { Must be 4 digits. } if Length(input) = 4 then begin Result := StrToFourDigit(input); if not WellFormed(Result) then begin WriteLn('Four unique digits, please.'); Result := GetGuess(); end; end else begin WriteLn('Please guess a four-digit number.'); Result := GetGuess(); end; end; var Num, Guess: TFourDigit; Turns: integer; begin { Initialize the randymnity. } Randomize(); { Make the secred number. } Num := MakeNumber(); WriteLn('I have a secret number. Guess it!'); Turns := 0; { Guess until the user gets it. } While True do begin Guess := GetGuess(); { Count each guess as a turn. } Turns := Turns + 1; { If the user won, tell them and ditch. } if Wins(Num, Guess) then begin WriteLn('You won in ' + IntToStr(Turns) + ' tries.'); Write('The number was '); WriteFourDigit(Num); WriteLn('!'); Exit; end else { Otherwise, score it and get a new guess. } begin WriteLn(GuessScore(Num, Guess)); end; end; end.  ## Perl use Data::Random qw(rand_set); use List::MoreUtils qw(uniq); my$size = 4;
my $chosen = join "", rand_set set => ["1".."9"], size =>$size;

print "I've chosen a number from $size unique digits from 1 to 9; you need to input$size unique digits to guess my number\n";

for ( my $guesses = 1; ;$guesses++ ) {
my $guess; while (1) { print "\nNext guess [$guesses]: ";
$guess = <STDIN>; chomp$guess;
checkguess($guess) and last; print "$size digits, no repetition, no 0... retry\n";
}
if ( $guess eq$chosen ) {
print "You did it in $guesses attempts!\n"; last; } my$bulls = 0;
my $cows = 0; for my$i (0 .. $size-1) { if ( substr($guess, $i, 1) eq substr($chosen, $i, 1) ) {$bulls++;
} elsif ( index($chosen, substr($guess, $i, 1)) >= 0 ) {$cows++;
}
}
print "$cows cows,$bulls bulls\n";
}

sub checkguess
{
my $g = shift; return uniq(split //,$g) == $size &&$g =~ /^[1-9]{$size}$/;
}


## Phix

--
-- demo\rosetta\BullsAndCows.exw
-- =============================
--
with javascript_semantics -- (DEV lots of resizing issues)
constant N = 4

return power(2,ch-'1')
end function

function score(string guess, goal)
integer bits = 0, bulls = 0, cows = 0, b
for i=1 to N do
b = goal[i]
if guess[i]=b then
bulls += 1
else
end if
end for
for i=1 to N do
if and_bits(bits,b)!=0 then
cows += 1
bits -= b
end if
end for
return {bulls, cows}
end function

include pGUI.e

Ihandle label, guess, res, dlg

string fmt = "   Guess %-2d  (%s)  bulls:%d  cows:%d\n",
tgt = shuffle("123456789")[1..N]
integer attempt = 1

function valuechanged_cb(Ihandle /*guess*/)
string g = IupGetAttribute(guess,"VALUE")
if length(g)=4 and length(unique(g))=4 then
integer {bulls, cows} = score(g,tgt)
string title = IupGetAttribute(res,"TITLE") &
sprintf(fmt,{attempt,g,bulls,cows})
if bulls=N then
title &= "\nWell done!"
IupSetInt(guess,"ACTIVE",false)
else
IupSetAttribute(guess,"VALUE","")
end if
IupSetStrAttribute(res,"TITLE",title)
attempt += 1
IupSetAttribute(dlg,"SIZE",NULL)
IupRefresh(dlg)
end if
return IUP_DEFAULT
end function

procedure main()
IupOpen()
label = IupLabel(sprintf("Enter %d digits 1 to 9 without duplication",{N}))
guess = IupText("VALUECHANGED_CB", Icallback("valuechanged_cb"))
res = IupLabel("")
dlg = IupDialog(IupVbox({IupHbox({label,guess},"GAP=10,NORMALIZESIZE=VERTICAL"),
IupHbox({res})},"MARGIN=5x5"),TITLE="Bulls and Cows")
IupShow(dlg)
if platform()!=JS then
IupMainLoop()
IupClose()
end if
end procedure

main()

Output:

(as shown in the res label)

   Guess 1   (5739)  bulls:0  cows:3
Guess 2   (7193)  bulls:2  cows:1
Guess 3   (3495)  bulls:0  cows:2
Guess 4   (7983)  bulls:3  cows:0
Guess 5   (7963)  bulls:3  cows:0
Guess 6   (7923)  bulls:4  cows:0

Well done!


## PHP

<?php
$size = 4;$chosen = implode(array_rand(array_flip(range(1,9)), $size)); echo "I've chosen a number from$size unique digits from 1 to 9; you need
to input $size unique digits to guess my number\n"; for ($guesses = 1; ; $guesses++) { while (true) { echo "\nNext guess [$guesses]: ";
$guess = rtrim(fgets(STDIN)); if (!checkguess($guess))
echo "$size digits, no repetition, no 0... retry\n"; else break; } if ($guess == $chosen) { echo "You did it in$guesses attempts!\n";
break;
} else {
$bulls = 0;$cows = 0;
foreach (range(0, $size-1) as$i) {
if ($guess[$i] == $chosen[$i])
$bulls++; else if (strpos($chosen, $guess[$i]) !== FALSE)
$cows++; } echo "$cows cows, $bulls bulls\n"; } } function checkguess($g)
{
global $size; return count(array_unique(str_split($g))) == $size && preg_match("/^[1-9]{{$size}}$/",$g);
}
?>


## Picat

Translation of: Python
main =>
Digits = to_array("123456789"),
Size = 4,
random_sample(Size,Size,[],ChosenIndecies),
Chosen = {Digits[I] : I in ChosenIndecies},
printf("I have chosen a number from %d unique digits from 1 to 9 arranged in a random order.\n", Size),
printf("You need to input a %d digit, unique digit number as a guess at what I have chosen.\n", Size),
guess(Chosen,Size,1).

guess(Chosen,Size,NGuess) =>
Guess = Input.to_array(),
if len(Guess) != Size || len(sort_remove_dups(Input)) != Size || (member(D, Input), (D @< '1' || D @> '9'))  then
printf("Problem, try again. You need to enter %d unique digits from 1 to 9\n", Size),
guess(Chosen,Size,NGuess)
elseif Guess == Chosen then
printf("\nCongratulations you guessed correctly in %d attempts\n", NGuess)
else
Bulls = sum([cond(Chosen[I] == Guess[I], 1, 0) : I in 1..Size]),
Cows = sum([cond(member(Chosen[I], Input), 1, 0) : I in 1..Size]),
printf("%d Bulls\n%d Cows\n", Bulls, Cows),
guess(Chosen, Size, NGuess+1)
end.

random_sample(_N,0,Chosen0,Chosen) => Chosen = Chosen0.
random_sample(N,I,Chosen0,Chosen) =>
R = random() mod N + 1,
(not member(R, Chosen0) ->
random_sample(N,I-1,[R|Chosen0],Chosen)
;
random_sample(N,I,Chosen0,Chosen)
).

## PicoLisp

(de ok? (N)
(let D (mapcar 'format (chop N))
(and (num? N)
(not (member 0 D))
(= 4 (length D))
(= D (uniq D))
D )) )

(de init-cows ()
(until (setq *Hidden (ok? (rand 1234 9876)))) )

(de guess (N)
(let D (ok? N)
(if D
(let Bulls (cnt '= D *Hidden)
(if (= 4 Bulls)
" You guessed it!"
(let Cows (- (cnt '((N) (member N *Hidden)) D) Bulls)
(pack Bulls " bulls, " Cows " cows") ) ) )
" Bad guess! (4 unique digits, 1-9)" ) ) )


## PowerShell

[int]$guesses =$bulls = $cows = 0 [string]$guess = "none"
[string]$digits = "" while ($digits.Length -lt 4)
{
$character = [char](49..57 | Get-Random) if ($digits.IndexOf($character) -eq -1) {$digits += $character} } Write-Host "nGuess four digits (1-9) using no digit twice.n" -ForegroundColor Cyan while ($bulls -lt 4)
{
do
{
$prompt = "Guesses={0:0#}, Last='{1,4}', Bulls={2}, Cows={3}; Enter your guess" -f$guesses, $guess,$bulls, $cows$guess = Read-Host $prompt if ($guess.Length -ne 4)                     {Write-Host "nMust be a four-digit numbern" -ForegroundColor Red}
if ($guess -notmatch "[1-9][1-9][1-9][1-9]") {Write-Host "nMust be numbers 1-9n" -ForegroundColor Red} } until ($guess.Length -eq 4)

$guesses += 1$bulls = $cows = 0 for ($i = 0; $i -lt 4;$i++)
{
$character =$digits.Substring($i,1) if ($guess.Substring($i,1) -eq$character)
{
$bulls += 1 } else { if ($guess.IndexOf($character) -ge 0) {$cows += 1
}
}
}
}

Write-Host "nYou won after $($guesses - 1) guesses." -ForegroundColor Cyan

Output:
Guess four digits (1-9) using no digit twice.

Guesses=00, Last='none', Bulls=0, Cows=0; Enter your guess: 1234
Guesses=01, Last='1234', Bulls=0, Cows=3; Enter your guess: 2345
Guesses=02, Last='2345', Bulls=1, Cows=2; Enter your guess: 2346
Guesses=03, Last='2346', Bulls=1, Cows=1; Enter your guess: 2341
Guesses=04, Last='2341', Bulls=1, Cows=2; Enter your guess: 3241
Guesses=05, Last='3241', Bulls=0, Cows=3; Enter your guess: 4321
Guesses=06, Last='4321', Bulls=1, Cows=2; Enter your guess: 5321
Guesses=07, Last='5321', Bulls=2, Cows=2; Enter your guess: 5312

You won after 7 guesses.


## Processing

Produces both a console transcript and a GUI interface to the game. Creates a new game each time the guess is correct; tracks number of games won.

IntDict score;
StringList choices;
StringList guess;
StringList secret;
int gamesWon = -1;

void setup() {
choices = new StringList("0", "1", "2", "3", "4", "5", "6", "7", "8", "9");
newGame();
}

void newGame() {
gamesWon++;
choices.shuffle();
secret = new StringList();
for (int i=0; i<4; i++) { // selections
secret.append(choices.get(i));
}
newGuess();
println("\nsecret:", secret, "\n");
}

void newGuess() {
guess = new StringList();
score = null;
}

void draw() {
background(0);
text("Bulls & Cows " + gamesWon, 5, 20);
for (int i=0; i<guess.size(); i++) {
text(guess.get(i), 20*i+10, height/2);
}
if (score!=null) {
text("bulls:" + score.get("bulls") + " cows:" + score.get("cows"), 10, height-20);
}
}

void keyReleased() {
if (score!=null && score.get("bulls")==4) newGame();
if (guess.size()==secret.size()) newGuess();
if (guess.hasValue(str(key))) newGuess();
if (key>=48 && key<=57) guess.append(str(key));
if (guess.size()==secret.size()) {
score = checkScore(secret, guess);
println("guess: ", guess, "\n", score, "wins:", gamesWon);
}
}

IntDict checkScore(StringList secret, StringList guess) {
IntDict result = new IntDict();
result.set("bulls", 0);
result.set("cows", 0);
for (int i=0; i<guess.size(); i++) {
if (guess.get(i).equals(secret.get(i))) {
} else if (secret.hasValue(guess.get(i))) {
}
}
return result;
}

## Prolog

Works with SWI-Prolog 6.1.8 (for predicate foldl), module lambda, written by Ulrich Neumerkel found there http://www.complang.tuwien.ac.at/ulrich/Prolog-inedit/lambda.pl and module clpfd written by Markus Triska.

:- use_module(library(lambda)).
:- use_module(library(clpfd)).

% Parameters of the server

% length of the guess
proposition(4).

% Numbers of digits
% 0 -> 8
digits(8).

bulls_and_cows_server :-
proposition(LenGuess),
length(Solution, LenGuess),
choose(Solution),
repeat,
(   study(Solution, Guess, Bulls, Cows)
->  format('Bulls : ~w Cows : ~w~n', [Bulls, Cows]),
Bulls = LenGuess
;   digits(Digits), Max is Digits + 1,
format('Guess must be of ~w digits between 1 and ~w~n',
[LenGuess, Max]),
fail).

choose(Solution) :-
digits(Digits),
Max is Digits + 1,
repeat,
maplist(\X^(X is random(Max) + 1), Solution),
all_distinct(Solution),
!.

study(Solution, Guess, Bulls, Cows) :-
proposition(LenGuess),
digits(Digits),

% compute the transformation 1234 => [1,2,3,4]
atom_chars(Guess, Chars),
maplist(\X^Y^(atom_number(X, Y)), Chars, Ms),

% check that the guess is well formed
length(Ms, LenGuess),
maplist(\X^(X > 0, X =< Digits+1), Ms),

% compute the digit in good place
foldl(\X^Y^V0^V1^((X = Y->V1 is V0+1; V1 = V0)),Solution, Ms, 0, Bulls),

% compute the digits in bad place
foldl(\Y1^V2^V3^(foldl(\X2^Z2^Z3^(X2 = Y1 -> Z3 is Z2+1; Z3 = Z2), Ms, 0, TT1),
V3 is V2+ TT1),
Solution, 0, TT),
Cows is TT - Bulls.


## PureBasic

Define.s secret, guess, c
Define.i bulls, cows, guesses, i

If OpenConsole()

While Len(secret) < 4
c = Chr(Random(8) + 49)
If FindString(secret, c, 1) = 0
secret + c
EndIf
Wend

Repeat
Print("Guess a 4-digit number with no duplicate digits: ")
guess = Input()
If Len(guess) = 0
Break   ;break from loop
EndIf

isMalformedGuess = #False
If Len(guess) <> 4
;guess is too short
isMalformedGuess = #True
Else
For i = 1 To 4
c = Mid(guess, i, 1)
If Not FindString("123456789", c, 1) Or CountString(guess, c) <> 1
;guess contains either non-digits or duplicate digits
isMalformedGuess = #True
Break ;break from For/Next loop
EndIf
Next
EndIf

If isMalformedGuess
PrintN("** You should enter 4 different numeric digits that are each from 1 to 9!")
Continue ;continue loop
EndIf

bulls = 0: cows = 0: guesses = guesses + 1
For i = 1 To 4
c = Mid(secret, i, 1)
If Mid(guess, i, 1) = c
bulls + 1
ElseIf FindString(guess, c, 1)
cows + 1
EndIf
Next

Print( Str(bulls) + " bull")
If bulls <> 1
Print( "s")
EndIf
Print( ", " + Str(cows) + " cow")
If cows <> 1
PrintN( "s")
Else
PrintN("")
EndIf

If guess = secret
PrintN("You won after " + Str(guesses) + " guesses!")
Break    ;break from loop
EndIf
ForEver

Print(#CRLF$+ #CRLF$ + "Press ENTER to exit")
Input()
CloseConsole()
EndIf

## Python

'''
Bulls and cows. A game pre-dating, and similar to, Mastermind.
'''

import random

digits = '123456789'
size = 4
chosen = ''.join(random.sample(digits,size))
#print chosen # Debug
print '''I have chosen a number from %s unique digits from 1 to 9 arranged in a random order.
You need to input a %i digit, unique digit number as a guess at what I have chosen''' % (size, size)
guesses = 0
while True:
guesses += 1
while True:
# get a good guess
guess = raw_input('\nNext guess [%i]: ' % guesses).strip()
if len(guess) == size and \
all(char in digits for char in guess) \
and len(set(guess)) == size:
break
print "Problem, try again. You need to enter %i unique digits from 1 to 9" % size
if guess == chosen:
print '\nCongratulations you guessed correctly in',guesses,'attempts'
break
bulls = cows = 0
for i in range(size):
if guess[i] == chosen[i]:
bulls += 1
elif guess[i] in chosen:
cows += 1
print '  %i Bulls\n  %i Cows' % (bulls, cows)


Sample output:

I have chosen a number from 4 unique digits from 1 to 9 arranged in a random order.
You need to input a 4 digit, unique digit number as a guess at what I have chosen

Next guess : 79
Problem, try again. You need to enter 4 unique digits from 1 to 9

Next guess : 7983
2 Bulls
2 Cows

Next guess : 7938

Congratulations you guessed correctly in 2 attempts

## QB64

Const MaxDigit = 4, Min = 1, Max = 9
Dim As String NumberToGuess, NumberToTest, Newdigit, Result
Dim As Integer Counter, Number
Randomize Timer
Do
Counter = Counter + 1
Newdigit = _Trim$(Str$(Int(Rnd * Max) + Min))
If InStr(NumberToGuess, Newdigit) = 0 Then NumberToGuess = NumberToGuess + Newdigit Else Counter = Counter - 1
Loop While Counter < MaxDigit
Print NumberToGuess  'debug output
Do While NumberToGuess <> NumberToTest
NumberToTest = _Trim$(Str$(Number))
If NumberToGuess <> NumberToTest Then
Result = ""
For Counter = 1 To 4 Step 1
Newdigit = Mid$(NumberToTest, Counter, 1) If InStr(NumberToGuess, Newdigit) - Counter = 0 Then Result = Result + " Bull " ElseIf InStr(NumberToGuess, Newdigit) > 0 Then Result = Result + " Cow " End If Next Counter Print NumberToTest, Result Else Print "You Win!" End If Loop ## Quackery transpose is defined at Matrix transposition#Quackery.  [ size 4 = dup not if [ say "Must be four digits." cr ] ] is 4chars ($ --> b     )

[ true swap witheach
[ char 1 char 9 1+ within not if
[ say "Must be 1-9 only." cr
not conclude ] ] ]                  is 1-9      (   $--> b ) [ 0 9 of swap witheach [ 1 unrot char 1 - poke ] 0 swap witheach + 4 = dup not if [ say "Must all be different." cr ] ] is all-diff ($ --> b     )

[ $"Guess four digits, 1-9, no duplicates: " input dup 4chars not iff drop again dup 1-9 not iff drop again dup all-diff not iff drop again ] is guess ($ --> $) [$ "123456789" shuffle 4 split drop ]        is rand$( -->$     )

[ 2 pack transpose
[] swap witheach
[ dup unpack != iff
[ nested join ]
else drop ]
dup [] != if
[ transpose unpack ]
4 over size - ]                             is -bulls   (  -->  n )

[ join sort
0 swap
[ tuck = if [ dip 1+ ] ]
drop ]                                      is cows     (  --> n     )

[ say "Guess the four numbers." cr cr
say "They are all different and"
say " between 1 and 9 inclusive." cr cr
randomise rand$[ guess over -bulls dup 4 = iff say "Correct." done dup echo 1 = iff [ say " bull." cr ] else [ say " bulls." cr ] cows dup echo 1 = iff [ say " cow." cr ] else [ say " cows." cr ] again ] cr drop 2drop ] is play ( --> ) Output: Guess the four numbers. They are all different and between 1 and 9 inclusive. Guess four digits, 1-9, no duplicates: 1234 0 bulls. 0 cows. Guess four digits, 1-9, no duplicates: 5678 1 bull. 3 cows. Guess four digits, 1-9, no duplicates: 5786 1 bull. 3 cows. Guess four digits, 1-9, no duplicates: 5867 0 bulls. 4 cows. Guess four digits, 1-9, no duplicates: 7658 2 bulls. 2 cows. Guess four digits, 1-9, no duplicates: 7685 0 bulls. 4 cows. Guess four digits, 1-9, no duplicates: 6758 Correct.  ## R Works with: R version 2.8.1 target <- sample(1:9,4) bulls <- 0 cows <- 0 attempts <- 0 while (bulls != 4) { input <- readline("Guess a 4-digit number with no duplicate digits or 0s: ") if (nchar(input) == 4) { input <- as.integer(strsplit(input,"")[]) if ((sum(is.na(input)+sum(input==0))>=1) | (length(table(input)) != 4)) {print("Malformed input!")} else { bulls <- sum(input == target) cows <- sum(input %in% target)-bulls cat("\n",bulls," Bull(s) and ",cows, " Cow(s)\n") attempts <- attempts + 1 } } else {print("Malformed input!")} } print(paste("You won in",attempts,"attempt(s)!"))  ## Racket #lang racket ; secret : (listof exact-nonnegative-integer?) (define secret (foldr (λ (n result) (cons n (map (λ (y) (if (>= y n) (add1 y) y)) result))) '() (map random '(10 9 8 7)))) ; (count-bulls/cows guess) -> (values exact-nonnegative-integer? ; exact-nonnegative-integer?) ; guess : (listof exact-nonnegative-integer?) (define (count-bulls/cows guess) (let* ([bulls (map = guess secret)] [cow-candidates (filter-map (λ (x y) (if (false? x) y #f)) bulls secret)] [cows (filter (curryr member cow-candidates) guess)]) (values (length (filter ((curry equal?) #t) bulls)) (length cows)))) ; (valid-guess guess-str) -> (or/c (listof exact-nonnegative-integer?) #f) ; guess-str : string? (define (valid-guess guess-str) (define (char->digit c) (- (char->integer c) (char->integer #\0))) (if (regexp-match-exact? #px"[0-9]{4}" guess-str) (let ([guess (map char->digit (string->list guess-str))]) (if (andmap (λ (x) (equal? (count ((curry equal?) x) guess) 1)) guess) guess #f)) #f)) ; Game states (define win #t) (define game #f) ; (main-loop state step) -> void? ; state : boolean? ; step : exact-nonnegative-integer? (define (main-loop state step) (if (equal? state win) (printf "You won after ~a guesses." step) (begin (let* ([guess-str (read-line)] [guess (valid-guess guess-str)]) (if (false? guess) (begin (displayln "Guess should include exactly four different digits") (main-loop state step)) (let-values ([(bulls cows) (count-bulls/cows guess)]) (if (= bulls 4) (main-loop win (add1 step)) (begin (printf "Bulls: ~a Cows: ~a\n" bulls cows) (main-loop state (add1 step)))))))))) (main-loop game 0)  Output: 1234 Bulls: 0 Cows: 1 21345 Guess should include exactly four different digits 2134 Bulls: 1 Cows: 0 2314 Bulls: 0 Cows: 1 5167 Bulls: 1 Cows: 1 5189 Bulls: 1 Cows: 2 0189 Bulls: 1 Cows: 2 8179 Bulls: 1 Cows: 3 7198 You won after 8 guesses.  ## Raku (formerly Perl 6) Translation of: Python Works with: Rakudo version 2015.12 my$size = 4;
my @secret = pick $size, '1' .. '9'; for 1..* ->$guesses {
my @guess;
loop {
@guess = (prompt("Guess $guesses: ") // exit).comb; last if @guess ==$size and
all(@guess) eq one(@guess) & any('1' .. '9');
say 'Malformed guess; try again.';
}
my ($bulls,$cows) = 0, 0;
for ^$size { when @guess[$_] eq @secret[$_] { ++$bulls; }
when @guess[$_] eq any @secret { ++$cows; }
}
last if $bulls ==$size;
say "$bulls bulls,$cows cows.";
}

say 'A winner is you!';


## Red

Red[]
a: "0123456789"
bulls: 0
random/seed now/time
number: copy/part random a 4
while [bulls <> 4] [
bulls: 0
cows: 0
guess: ask "make a guess: "
repeat i 4 [
if (pick guess i) = (pick number i) [bulls: bulls + 1]
]
cows: (length? intersect guess number) - bulls
print ["bulls: " bulls " cows: " cows]
]
print "You won!"


## REXX

This game is also known as:

• Pigs and Bulls
• Bulls and Cleots
• Mastermind
• Master Mind

### version 1

See version 2 for a better formatted progtam that also runs on ooRexx.
This REXX version of Bulls and Cows doesn't allow repeated digits (in the computer-generated number),
nor the use of the zero digit.

To allow a zero digit, change the   1   on the 2nd REXX statement for the   random   BIF invocation.
To allow repeated digits in the computer-generated number, delete the 3rd REXX statement     if pos(r, ?)···,
and also change the prompt message.
The REXX statement that contains the   translate   statement can be removed if repeated digits aren't allowed.

/*REXX program scores the   Bulls & Cows   game with  CBLFs  (Carbon Based Life Forms). */
?=; do  until length(?)==4;   r= random(1, 9)  /*generate a unique four-digit number.   */
if pos(r,?)\==0  then iterate;  ?= ? || r  /*don't allow a repeated digit/numeral.  */
end   /*until length*/                     /* [↑]  builds a unique four-digit number*/
$= '──────── [Bulls & Cows] ' /*a literal that is part of the prompt. */ do until bulls==4; say /*play until guessed or enters "Quit".*/ say$  'Please enter a 4-digit guess (with no zeroes)   [or Quit]:'
pull n;  n=space(n, 0);   if abbrev('QUIT', n, 1)  then exit   /*user wants to quit?*/
q=?;   L= length(n);   bulls= 0;   cows= 0 /*initialize some REXX variables.        */
do j=1  for L;    if substr(n, j, 1)\==substr(q, j, 1)  then iterate  /*is bull?*/
bulls= bulls +1;  q= overlay(., q, j)  /*bump the bull count;  disallow for cow.*/
end   /*j*/                            /* [↑]  bull count───────────────────────*/
/*is cow? */
do k=1  for L;   _= substr(n, k, 1);           if pos(_, q)==0  then iterate
cows=cows + 1;   q= translate(q, , _)  /*bump the cow count;  allow mult digits.*/
end   /*k*/                            /* [↑]  cow  count───────────────────────*/
say;                  @= 'You got'   bulls
if L\==0  &  bulls\==4  then say $@ 'bull's(bulls) "and" cows 'cow's(cows). end /*until bulls*/ say " ┌─────────────────────────────────────────┐" say " │ │" say " │ Congratulations, you've guessed it !! │" say " │ │" say " └─────────────────────────────────────────┘" exit /*stick a fork in it, we're all done. */ /*──────────────────────────────────────────────────────────────────────────────────────*/ s: if arg(1)==1 then return ''; return "s" /*this function handles pluralization. */  ### Version 2 /*REXX program to play the game of "Bulls & Cows". ******************* * Changes from Version 1: * ?= -> qq='' (righthandside mandatory and I never use ? as symbol - * although it is available on all Rexxes) * implemented singular/plural distinction differently * change getRand to avoid invalid digit rejection * check user's input for multiple digits * add feature MM to ease guessing (MM=Mastermind - a similar game) * add feature ? to see the solution (for the impatient player) * program runs as is on ooRexx and on TSO (after changing | to !) * Made source and output more compact * formatted source 'my way' 2 July 2012 Walter Pachl **********************************************************************/ ask='<Bulls & Cows game> Please enter a four-digit guess (or QUIT):' b.='bulls'; b.1='bull' c.='cows'; c.1='cow' qq=getRand() mm=0 Do Forever If get_guess()==qq Then leave Call scorer Say "You got" bulls b.bulls "and" cows c.cows"." If mm Then Say mms End /*forever*/ Say " *******************************************" Say " * *" Say " * Congratulations, you've guessed it !! *" Say " * *" Say " *******************************************" Exit get_guess: /*get a guess from the guesser. */ do forever Say ask Parse Pull guessi guess=translate(guessi) bc=verify(guess,987654321) Select When guess='?' Then Say qq 'is the correct sequence' When guess='QUIT' Then Exit When guess='MM' Then Do Say 'Mastermind output enabled' mm=1 End When guess='' Then Call ser 'no argument specified.' When words(guess)>1 Then Call ser 'too many arguments specified.' When verify(0,guess)=0 Then Call ser 'illegal digit: 0' When bc>0 Then Call ser 'illegal character:' substr(guessi,bc,1) When length(guess)<4 Then Call ser 'not enough digits' When length(guess)>4 Then Call ser 'too many digits' When dups(guess) Then Call ser '4 DIFFERENT digits, please' Otherwise Do /********** Say guess ************/ Return guess End End End getRand: digits='123456789' qq='' Do i=1 To 4 d=random(1,length(digits)) d=substr(digits,d,1) qq=qq||d digits=space(translate(digits,' ',d),0) /************ Say qq digits ************/ End Return qq scorer: g=qq mms='----' bulls=0 Do j=1 for 4 If substr(guess,j,1)=substr(qq,j,1) Then Do bulls=bulls+1 guess=overlay(' ',guess,j) mms=overlay('+',mms,j) End End cows=0 Do j=1 To 4 If pos(substr(guess,j,1),qq)>0 Then Do cows=cows+1 mms=overlay('.',mms,j) End End Return dups: Procedure Parse Arg s Do i=1 To 3 If pos(substr(s,i,1),substr(s,i+1))>0 Then Return 1 End Return 0 ser: Say '*** error ***' arg(1); Return  ## Ring # Project : Bulls and cows secret = "" while len(secret) != 4 c = char(48 + random(9)) if substr(secret, c) = 0 secret = secret + c ok end see "guess a four-digit number with no digit used twice." guesses = 0 guess = "" while true guess = "" while len(guess) != 4 see "enter your guess: " give guess if len(guess) != 4 see "must be a four-digit number" + nl ok end guesses = guesses + 1 if guess = secret see "you won after " + guesses + " guesses!" exit ok bulls = 0 cows = 0 for i = 1 to 4 c = secret[i] if guess[i] = c bulls = bulls + 1 but substr(guess, c) > 0 cows = cows + 1 ok next see "you got " + bulls + " bull(s) and " + cows + " cow(s)." + nl end ## RPL Works with: HP version 49 « CLEAR 0 "" 1 4 START WHILE RAND 9 * CEIL R→I →STR DUP2 POS REPEAT DROP END + NEXT → count solution « DO 1 CF DO "Guess? [CONT]" PROMPT →STR CASE DUP SIZE 4 ≠ THEN DROP "Not 4 characters" 1 DISP 0.5 WAIT END { 9 } 0 CON 1 4 FOR j OVER j DUP SUB STR→ IFERR 1 PUT THEN 3 DROPN "Invalid character" 1 DISP 0.5 WAIT END NEXT DUP 1 CON DOT 4 ≠ THEN DROP "Repeated digits" 1 DISP 0.5 WAIT END 1 SF END UNTIL 1 FS? END " → " + 0 1 4 FOR j solution PICK3 j DUP SUB POS IF DUP THEN IF j == THEN 1 ELSE .1 END END + NEXT SWAP OVER + 'count' INCR DROP UNTIL SWAP 4 == END count "guess" →TAG » » 'BU&CO' ST0  ## Ruby Inspired by Tcl Works with: Ruby version 1.8.7+ def generate_word(len) [*"1".."9"].shuffle.first(len) # [*"1".."9"].sample(len) ver 1.9+ end def get_guess(len) loop do print "Enter a guess: " guess = gets.strip err = case when guess.match(/[^1-9]/) ; "digits only" when guess.length != len ; "exactly #{len} digits" when guess.split("").uniq.length != len; "digits must be unique" else return guess.split("") end puts "the word must be #{len} unique digits between 1 and 9 (#{err}). Try again." end end def score(word, guess) bulls = cows = 0 guess.each_with_index do |num, idx| if word[idx] == num bulls += 1 elsif word.include? num cows += 1 end end [bulls, cows] end word_length = 4 puts "I have chosen a number with #{word_length} unique digits from 1 to 9." word = generate_word(word_length) count = 0 loop do guess = get_guess(word_length) count += 1 break if word == guess puts "that guess has %d bulls and %d cows" % score(word, guess) end puts "you guessed correctly in #{count} tries."  Inspired by Python Works with: Ruby version 2.0+ size = 4 secret = [*'1' .. '9'].sample(size) guess = nil i=0 loop do i+=1 loop do print "Guess #{i}: " guess = gets.chomp.chars exit if guess.empty? break if guess.size == size and guess.all? { |x| ('1'..'9').include? x } and guess.uniq.size == size puts "Problem, try again. You need to enter #{size} unique digits from 1 to 9" end if guess == secret puts "Congratulations you guessed correctly in #{i} attempts" break end bulls = cows = 0 size.times do |j| if guess[j] == secret[j] bulls += 1 elsif secret.include? guess[j] cows += 1 end end puts "Bulls: #{bulls}; Cows: #{cows}" end  ## Rust Library: rand use std::io; use rand::{Rng,thread_rng}; extern crate rand; const NUMBER_OF_DIGITS: usize = 4; static DIGITS: [char; 9] = ['1', '2', '3', '4', '5', '6', '7', '8', '9']; fn generate_digits() -> Vec<char> { let mut temp_digits: Vec<_> = (&DIGITS[..]).into(); thread_rng().shuffle(&mut temp_digits); return temp_digits.iter().take(NUMBER_OF_DIGITS).map(|&a| a).collect(); } fn parse_guess_string(guess: &str) -> Result<Vec<char>, String> { let chars: Vec<char> = (&guess).chars().collect(); if !chars.iter().all(|c| DIGITS.contains(c)) { return Err("only digits, please".to_string()); } if chars.len() != NUMBER_OF_DIGITS { return Err(format!("you need to guess with {} digits", NUMBER_OF_DIGITS)); } let mut uniques: Vec<char> = chars.clone(); uniques.dedup(); if uniques.len() != chars.len() { return Err("no duplicates, please".to_string()); } return Ok(chars); } fn calculate_score(given_digits: &[char], guessed_digits: &[char]) -> (usize, usize) { let mut bulls = 0; let mut cows = 0; for i in 0..NUMBER_OF_DIGITS { let pos: Option<usize> = guessed_digits.iter().position(|&a| -> bool {a == given_digits[i]}); match pos { None => (), Some(p) if p == i => bulls += 1, Some(_) => cows += 1 } } return (bulls, cows); } fn main() { let reader = io::stdin(); loop { let given_digits = generate_digits(); println!("I have chosen my {} digits. Please guess what they are", NUMBER_OF_DIGITS); loop { let guess_string: String = { let mut buf = String::new(); reader.read_line(&mut buf).unwrap(); buf.trim().into() }; let digits_maybe = parse_guess_string(&guess_string); match digits_maybe { Err(msg) => { println!("{}", msg); continue; }, Ok(guess_digits) => { match calculate_score(&given_digits, &guess_digits) { (NUMBER_OF_DIGITS, _) => { println!("you win!"); break; }, (bulls, cows) => println!("bulls: {}, cows: {}", bulls, cows) } } } } } }  ## Scala import scala.util.Random object BullCow { def main(args: Array[String]): Unit = { val number=chooseNumber var guessed=false var guesses=0 while(!guessed){ Console.print("Guess a 4-digit number with no duplicate digits: ") val input=Console.readInt val digits=input.toString.map(_.asDigit).toList if(input>=1111 && input<=9999 && !hasDups(digits)){ guesses+=1 var bulls, cows=0 for(i <- 0 to 3) if(number(i)==digits(i)) bulls+=1 else if(number.contains(digits(i))) cows+=1 if(bulls==4) guessed=true else println("%d Cows and %d Bulls.".format(cows, bulls)) } } println("You won after "+guesses+" guesses!"); } def chooseNumber={ var digits=List[Int]() while(digits.size<4){ val d=Random.nextInt(9)+1 if (!digits.contains(d)) digits=digits:+d } digits } def hasDups(input:List[Int])=input.size!=input.distinct.size }  ## Scheme Works with: any R6RS Scheme ;generate a random non-repeating list of 4 digits, 1-9 inclusive (define (get-num) (define (gen lst) (if (= (length lst) 4) lst (let ((digit (+ (random 9) 1))) (if (member digit lst) ;make sure the new digit isn't in the ;list (gen lst) (gen (cons digit lst)))))) (string->list (apply string-append (map number->string (gen '()))))) ;is g a valid guess (that is, non-repeating, four digits 1-9 ;inclusive?) (define (valid-guess? g) (let ((g-num (string->number (apply string g)))) ;does the same digit appear twice in lst? (define (repeats? lst) (cond ((null? lst) #f) ((member (car lst) (cdr lst)) #t) (else (repeats? (cdr lst))))) (and g-num (> g-num 1233) (< g-num 9877) (not (repeats? g))))) ;return '(cows bulls) for the given guess (define (score answer guess) ;total cows + bulls (define (cows&bulls a g) (cond ((null? a) 0) ((member (car a) g) (+ 1 (cows&bulls (cdr a) g))) (else (cows&bulls (cdr a) g)))) ;bulls only (define (bulls a g) (cond ((null? a) 0) ((equal? (car a) (car g)) (+ 1 (bulls (cdr a) (cdr g)))) (else (bulls (cdr a) (cdr g))))) (list (- (cows&bulls answer guess) (bulls answer guess)) (bulls answer guess))) ;play the game (define (bull-cow answer) ;get the user's guess as a list (define (get-guess) (let ((e (read))) (if (number? e) (string->list (number->string e)) (string->list (symbol->string e))))) (display "Enter a guess: ") (let ((guess (get-guess))) (if (valid-guess? guess) (let ((bulls (cadr (score answer guess))) (cows (car (score answer guess)))) (if (= bulls 4) (display "You win!\n") (begin (display bulls) (display " bulls, ") (display cows) (display " cows.\n") (bull-cow answer)))) (begin (display "Invalid guess.\n") (bull-cow answer))))) (bull-cow (get-num))  ### Sample game play Enter a guess: 1234 0 bulls, 1 cows. Enter a guess: 2345 1 bulls, 0 cows. Enter a guess: 2346 1 bulls, 1 cows. Enter a guess: 2367 0 bulls, 1 cows. Enter a guess: 2647 1 bulls, 1 cows. Enter a guess: 2648 2 bulls, 1 cows. Enter a guess: 2468 1 bulls, 2 cows. Enter a guess: 1468 1 bulls, 2 cows. Enter a guess: 2684 0 bulls, 3 cows. Enter a guess: 6248 3 bulls, 0 cows. Enter a guess: 6948 You win!  ## Scratch Scratch is a graphical programming language. Follow the link to see an example solution for Bulls and Cows Scratch - Bulls and Cows The program "says" the score of the current guess and uses a list to display previous guesses. Malformed guesses are rejected for the following reasons: • Guess is longer or shorter than 4 characters • Guess contains character other than the digits 1 - 9 • Guess contains a digit more than once (i.e. 3484 - this would be rejected because "4" appears in the guess two times) Since Scratch is an educational language, I've included comments in the code to explain what the program is doing. ## Seed7 $ include "seed7_05.s7i";

const proc: main is func
local
const integer: size is 4;
var set of char: digits is {'1' .. '9'};
var string: chosen is " " mult size;
var integer: guesses is 0;
var string: guess is "";
var integer: pos is 0;
var integer: bulls is 0;
var integer: cows is 0;
var boolean: okay is FALSE;
begin
for pos range 1 to 4 do
chosen @:= [pos] rand(digits);
excl(digits, chosen[pos]);
end for;
writeln("I have chosen a number from " <& size <& " unique digits from 1 to 9 arranged in a random order.");
writeln("You need to input a " <& size <& " digit, unique digit number as a guess at what I have chosen");
repeat
incr(guesses);
repeat
write("Next guess [" <& guesses <& "]: ");
okay := length(guess) = size;
for key pos range guess do
okay := okay and guess[pos] in {'1' .. '9'} and pos(guess[succ(pos) ..], guess[pos]) = 0;
end for;
if not okay then
writeln("Problem, try again. You need to enter " <& size <& " unique digits from 1 to 9");
end if;
until okay;
if guess <> chosen then
bulls := 0;
cows := 0;
for key pos range chosen do
if guess[pos] = chosen[pos] then
incr(bulls);
elsif pos(chosen, guess[pos]) <> 0 then
incr(cows);
end if;
end for;
writeln("  " <& bulls <& " Bulls");
writeln("  " <& cows <& " Cows");
end if;
until guess = chosen;
writeln("Congratulations you guessed correctly in " <& guesses <& " attempts");
end func;
Output:
I have chosen a number from 4 unique digits from 1 to 9 arranged in a random order.
You need to input a 4 digit, unique digit number as a guess at what I have chosen
Next guess : 1234
1 Bulls
0 Cows
Next guess : 1567
1 Bulls
2 Cows
Next guess : 1856
3 Bulls
0 Cows
Next guess : 1956
Congratulations you guessed correctly in 4 attempts


## SenseTalk

repeat forever
repeat forever
put random(1111,9999) into num
if character 1 of num is not equal to character 2 of num
if character 1 of num is not equal to character 3 of num
if character 1 of num is not equal to character 4 of num
if character 2 of num is not equal to character 3 of num
if character 2 of num is not equal to character 4 of num
if character 3 of num is not equal to character 4 of num
if num does not contain 0
exit repeat
end if
end if
end if
end if
end if
end if
end if
end repeat
set description to "Guess the 4 digit number" & newline & "- zero's excluded" & newline & "- each digit is unique" & newline & newline & "Receive 1 Bull for each digit that equals the corresponding digit in the random number." & newline & newline & "Receive 1 Cow for each digit that appears in the wrong position." & newline
repeat forever
repeat forever
Ask "Guess the number" title "Bulls & Cows" message description
put it into guess
if number of characters in guess is equal to 4
exit repeat
else if guess is ""
Answer "" with "Play" or "Quit" title "Quit Bulls & Cows?"
exit all
end if
end if
end repeat
set score to {
bulls: {
qty: 0,
values: []
},
cows: {
qty: 0,
values: []
}
}
repeat the number of characters in num times
if character the counter of guess is equal to character the counter of num
insert character the counter of guess into score.bulls.values
else
if num contains character the counter of guess
if character the counter of guess is not equal to character the counter of num
if score.bulls.values does not contain character the counter of guess and score.cows.values does not contain character the counter of guess
insert character the counter of guess into score.cows.values
end if
end if
end if
end if
end repeat
set showScores to "Your score is:" & newline & newline & "Bulls:" && score.bulls.qty & newline & newline & "Cows:" && score.cows.qty
if guess is not equal to num
Answer showScores with "Guess Again" or "Quit" title "Score"
exit all
end if
else
set winShowScores to showScores & newline & newline & "Your Guess:" && guess & newline & "Random Number:" && num & newline
Answer winShowScores with "Play Again" or "Quit" title "You Win!"
exit all
end if
exit repeat
end if
end repeat
end repeat

## SETL

program bulls_and_cows;
setrandom(0);

print("Bulls and cows");
print("--------------");
print;

secret := make_secret();

loop do
tries +:= 1;
bulls := count_bulls(guess, secret);
cows := count_cows(guess, secret);
print(bulls, "bulls,", cows, "cows.");
if bulls = 4 then
print("You win!  Tries:", tries);
exit;
end if;
end loop;

proc make_secret();
digits := [];
loop for i in [1..4] do
loop until not digit in digits do
digit := 1 + random(8);
end loop;
digits with:= digit;
end loop;
return digits;
end proc;

loop do
putchar("Guess? ");
flush(stdout);
guess := getline(stdin);
if exists d in guess | not d in "123456789" then
print("invalid input:", d);
elseif #guess /= #{d : d in guess} then
print("no duplicates allowed");
elseif #guess /= 4 then
print("need 4 digits");
else
exit;
end if;
end loop;
return [val d : d in guess];
end proc;

proc count_bulls(guess, secret);
return #[i : i in [1..4] | guess(i) = secret(i)];
end proc;

proc count_cows(guess, secret);
return #[d : d in guess | d in secret] - count_bulls(guess, secret);
end proc;
end program;
Output:
Bulls and cows
--------------

Guess? 1234
0 bulls, 1 cows.
Guess? 5678
2 bulls, 1 cows.
Guess? 5978
2 bulls, 0 cows.
Guess? 5968
1 bulls, 1 cows.
Guess? 5976
1 bulls, 1 cows.
Guess? 6978
3 bulls, 0 cows.
Guess? 6971
2 bulls, 0 cows.
Guess? 6918
2 bulls, 0 cows.
Guess? 1978
2 bulls, 0 cows.
Guess? 6178
3 bulls, 0 cows.
Guess? 6278
3 bulls, 0 cows.
Guess? 6378
4 bulls, 0 cows.
You win!  Tries: 12

## Shale

#!/usr/local/bin/shale

maths library
file library
string library

n0 var
n1 var
n2 var
n3 var
g0 var
g1 var
g2 var
g3 var

init dup var {
c guess:: var
} =

getNum dup var {
random maths::() 15 >> 9 % 1 +
} =

game dup var {
haveWon dup var false =
ans var
i var
c var
b var

c guess:: 0 =

n0 getNum() =
n1 getNum() =
{ n1 n0 == } {
n1 getNum() =
} while
n2 getNum() =
{ n2 n0 == n2 n1 == or } {
n2 getNum() =
} while
n3 getNum() =
{ n3 n0 == n3 n1 == n3 n2 == or or } {
n3 getNum() =
} while

"New game" println
{ haveWon not } {
"> " print
stdin file:: fgets file::() {
ans swap atoi string::() =
g3 ans 10 % =
g2 ans 10 / 10 % =
g1 ans 100 / 10 % =
g0 ans 1000 / 10 % =
g0 0 > g0 10 < and g1 0 > g1 10 < and g2 0 > g2 10 < and g3 0 > g3 10 < and and and and {
c 0 =
b 0 =

g0 n0 == {
b++
} {
g0 n1 == g0 n2 == g0 n3 == or or { c++ } ifthen
} if

g1 n1 == {
b++
} {
g1 n0 == g1 n2 == g1 n3 == or or { c++ } ifthen
} if

g2 n2 == {
b++
} {
g2 n0 == g2 n1 == g2 n3 == or or { c++ } ifthen
} if

g3 n3 == {
b++
} {
g3 n0 == g3 n1 == g3 n2 == or or { c++ } ifthen
} if

i c guess:: =
i.value guess:: guess:: defined not {
i.value guess:: guess:: var
i.value cow:: guess:: var
i.value bull:: guess:: var
} ifthen
i.value guess:: guess:: ans =
i.value cow:: guess:: c =
i.value bull:: guess:: b =
c guess::++

"Go  Guess Cows Bulls" println
i 0 =
{ i c guess:: < } {
i.value bull:: guess:: i.value cow:: guess:: i.value guess:: guess:: i 1 + "%2d  %d  %4d %5d\n" printf
i++
} while

b 4 == { haveWon true = } ifthen
} {
"Illegal input" println
} if
} {
0 exit
} if
} while

} =

play dup var {
{ true } {
game()
} while
} =

init()
play()
Output:
New game
> 1234
Go  Guess Cows Bulls
1  1234     2     0
> 2345
Go  Guess Cows Bulls
1  1234     2     0
2  2345     2     0
> 3456
Go  Guess Cows Bulls
1  1234     2     0
2  2345     2     0
3  3456     0     2
> 4567
Go  Guess Cows Bulls
1  1234     2     0
2  2345     2     0
3  3456     0     2
4  4567     1     0
> 5678
Go  Guess Cows Bulls
1  1234     2     0
2  2345     2     0
3  3456     0     2
4  4567     1     0
5  5678     1     1
> 6789
Go  Guess Cows Bulls
1  1234     2     0
2  2345     2     0
3  3456     0     2
4  4567     1     0
5  5678     1     1
6  6789     1     0
> 3158
Go  Guess Cows Bulls
1  1234     2     0
2  2345     2     0
3  3456     0     2
4  4567     1     0
5  5678     1     1
6  6789     1     0
7  3158     0     4
New game
>

## Sidef

var size = 4
var num = @(1..9).shuffle.first(size)

for (var guesses = 1; true; guesses++) {

var bulls = 0
var cows  = 0

var input =
.uniq            \
.grep(/^[1-9]$/) \ .map{.to_n} if (input.len != size) { warn "Invalid input!\n" guesses-- next } if (input == num) { printf("You did it in %d attempts!\n", guesses) break } for i (^num) { if (num[i] == input[i]) { bulls++ } elsif (num.contains(input[i])) { cows++ } } "Bulls: %d; Cows: %d\n".printf(bulls, cows) }  Output: Input: 2953 Bulls: 1; Cows: 1 Input: 9654 Bulls: 1; Cows: 1 Input: 8924 Bulls: 1; Cows: 3 Input: 2894 You did it in 4 attempts!  ## Smalltalk Works with: GNU Smalltalk Object subclass: BullsCows [ |number| BullsCows class >> new: secretNum [ |i| i := self basicNew. (self isValid: secretNum) ifFalse: [ SystemExceptions.InvalidArgument signalOn: secretNum reason: 'You need 4 unique digits from 1 to 9' ]. i setNumber: secretNum. ^ i ] BullsCows class >> new [ |b| b := Set new. [ b size < 4 ] whileTrue: [ b add: ((Random between: 1 and: 9) displayString first) ]. ^ self new: (b asString) ] BullsCows class >> isValid: num [ ^ (num asSet size = 4) & ((num asSet includes:$0) not)
]
setNumber: num [ number := num ]
check: guess [ |bc| bc := Bag new.
1 to: 4 do: [ :i |
(number at: i) = (guess at: i)
ifTrue: [ bc add: 'bulls' ]
ifFalse: [
(number includes: (guess at: i))
ifTrue: [ bc add: 'cows' ]
]
].
^ bc
]
].

'Guess the 4-digits number (digits from 1 to 9, no repetition)' displayNl.

|guessMe d r tries|
[
tries := 0.
guessMe := BullsCows new.
[
[
'Write 4 digits: ' display.
d := stdin nextLine.
(BullsCows isValid: d)
] whileFalse: [
'Insert 4 digits, no repetition, exclude the digit 0' displayNl
].
r := guessMe check: d.
tries := tries + 1.
(r occurrencesOf: 'bulls') = 4
] whileFalse: [
('%1 cows, %2 bulls' % { r occurrencesOf: 'cows'. r occurrencesOf: 'bulls' })
displayNl.
].
('Good, you guessed it in %1 tries!' % { tries }) displayNl.
'Do you want to play again? [y/n]' display.
( (stdin nextLine) = 'y' )
] whileTrue: [ Character nl displayNl ].


## Smart BASIC

'by rbytes, January 2017
OPTION BASE 1
P("  B U L L S   A N D    C O W S")!l
P("A secret 4-digit number has been created, with")
P("no repeats and no zeros. You must guess the number.")
P("After each guess, you will be shown how many of your")
P("digits are correct and in the matching location (bulls),")
P("and how many are correct but in a different location (cows).")
p("See how many tries it takes you to get the right answer.")
' generate a 4-digit number with no repeats
guesses  =   0
1 WHILE LEN(sec$) <4 c$ =CHR$( INTEG(RND(1) *9) +49) IF INSTR(sec$, c$)=-1 THEN sec$&=c$ENDWHILE!l 2 PRINT "Your guess: " INPUT "FOUR DIGITS": guess$!l
IF guess$="" THEN ' check if entry is null P("Please enter something!")!l GOTO 2 ENDIF P(guess$)!l
IF LEN(guess$)<>4 THEN ' check if entry is exactly 4 characters P("Please enter exactly 4 digits.")!l GOTO 2 ENDIF FOR t=1 TO 4 ' check if all characters are digits 1 - 9 IF INSTR("123456789",MID$(guess$,t,1))=-1 THEN P("You have entered at least one illegal character")!l GOTO 2 ENDIF NEXT t rep = check(guess$)     ' check if any digits are repeated
IF check.chk THEN
P("Please enter a number with no repeated digits.")!l
GOTO 2
ENDIF

guesses+=1
r$=score$(guess$,sec$)
P(r$)!l IF guess$=sec$THEN P("W I N N E R ! ! !")!l IF guesses>1 THEN gs$="guesses!" ELSE gs$="guess!" P("You won after "&guesses&" "&gs$)
P("Thanks for playing!")!l
PAUSE 2
P("A G A I N  with a new secret number")!l
guesses=0
END IF
GOTO 1
END '   _____________________________________________________________

DEF P(p$) ' function to print a string PRINT p$
END DEF

DEF L()                ' function to print an empty line
PRINT
END DEF

DEF check(i$) ' check=0 if digit is not repeated, else=1 chk=0 FOR i =1 TO 3 FOR j =i +1 TO 4 IF MID$( i$, i, 1)=MID$( i$, j, 1) THEN chk =1 NEXT j NEXT i END DEF DEF score$(a$,b$)      ' calculate the numbers of bulls & cows.
bulls=0!cows=0
FOR i = 1 TO 4
c$= MID$( a$, i, 1) IF MID$( b$, i, 1)=c$ THEN
bulls+=1
ELSE
IF INSTR( b$, c$) <>-1 AND INSTR( b$, c$) <>i THEN
cows+=1
END IF
END IF
NEXT i
r$="Bulls: "&STR$( bulls)& ", "& "Cows: " &STR$( cows) RETURN r$
END DEF
END

## Swift

Works with: Swift version 5.7

This is the same as the original solution but takes advantage of Swift 5's richer standard library to clean things up a bit.

func generateRandomNumArray(numDigits: Int = 4) -> [Character]
{
guard (1 ... 9).contains(numDigits) else { fatalError("number out of range") }

return Array("123456789".shuffled()[0 ..< numDigits])
}

func parseGuess(_ guess: String, numDigits: Int = 4) -> String?
{
guard guess.count == numDigits else { return nil }
// Only digits 0 to 9 allowed, no Unicode fractions or numbers from other languages
let guessArray = guess.filter{ $0.isASCII &&$0.isWholeNumber }

guard Set(guessArray).count == numDigits else { return nil }

return guessArray
}

func pluralIfNeeded(_ count: Int, _ units: String) -> String
{
return "\(count) " + units + (count == 1 ? "" : "s")
}

var guessAgain = "y"
while guessAgain == "y"
{
let num = generateRandomNumArray()
var bulls = 0
var cows = 0

print("Please enter a 4 digit number with digits between 1-9, no repetitions: ")

if let guessStr = readLine(strippingNewline: true), let guess = parseGuess(guessStr)
{
for (guess, actual) in zip(guess, num)
{
if guess == actual
{
bulls += 1
}
else if num.contains(guess)
{
cows += 1
}
}

print("Actual number: " + num)
print("Your score: \(pluralIfNeeded(bulls, "bull")) and \(pluralIfNeeded(cows, "cow"))\n")
print("Would you like to play again? (y): ")

guessAgain = readLine(strippingNewline: true)?.lowercased() ?? "n"
}
else
{
print("Invalid input")
}
}

import Foundation

func generateRandomNumArray(numDigits: Int = 4) -> [Int] {
guard numDigits > 0 else {
return []
}

let needed =  min(9, numDigits)
var nums = Set<Int>()

repeat {
nums.insert(.random(in: 1...9))
} while nums.count != needed

return Array(nums)
}

func parseGuess(_ guess: String) -> [Int]? {
guard guess.count == 4 else {
return nil
}

let guessArray = guess.map(String.init).map(Int.init).compactMap({ $0 }) guard Set(guessArray).count == 4 else { return nil } return guessArray } while true { let num = generateRandomNumArray() var bulls = 0 var cows = 0 print("Please enter a 4 digit number with digits between 1-9, no repetitions: ") guard let guessStr = readLine(strippingNewline: true), let guess = parseGuess(guessStr) else { print("Invalid input") continue } for (guess, actual) in zip(guess, num) { if guess == actual { bulls += 1 } else if num.contains(guess) { cows += 1 } } print("Actual number: \(num.map(String.init).joined())") print("Your score: \(bulls) bulls and \(cows) cows\n") print("Would you like to play again? (y): ") guard readLine(strippingNewline: true)!.lowercased() == "y" else { exit(0) } }  Output: Please enter a 4 digit number with digits between 1-9, no repetitions: 8496 Actual number: 6475 Your score: 1 bulls and 1 cows Would you like to play again? (y): y Please enter a 4 digit number with digits between 1-9, no repetitions: 5983 Actual number: 7846 Your score: 0 bulls and 1 cows  ## Tcl proc main {} { fconfigure stdout -buffering none set length 4 puts "I have chosen a number from$length unique digits from 1 to 9 arranged in a random order.
You need to input a $length digit, unique digit number as a guess at what I have chosen " while true { set word [generateWord$length]
set count 1
while {[set guess [getGuess $length]] ne$word} {
printScore $length$word $guess incr count } puts "You guessed correctly in$count tries."
if {[yn "Play again?"] eq "n"} break
}
}

proc generateWord {length} {
set chars 123456789
for {set i 1} {$i <=$length} {incr i} {
set idx [expr {int(rand() * [string length $chars])}] append word [string index$chars $idx] set chars [string replace$chars $idx$idx]
}
return $word # here's another way to generate word with no duplications set word "" while {[string length$word] < $length} { set char [expr {int(1 + 9*rand())}] if {[string first$char $word] == -1} { append word$char
}
}
}

proc getGuess {length} {
puts -nonewline "Enter your guess: "
while true {
gets stdin guess
if {[string match [string repeat {[1-9]} $length]$guess]} {
return $guess } if {[string tolower [string trim$guess]] eq "quit"} {
puts Bye
exit
}
puts "The word must be $length digits between 1 and 9 inclusive. Try again." } } proc printScore {length word guess} { set bulls 0 set cows 0 for {set i 0} {$i < $length} {incr i} { if {[string index$word $i] eq [string index$guess $i]} { incr bulls set word [string replace$word $i$i +]
}
}
puts "  $bulls bulls" for {set i 0} {$i < $length} {incr i} { if {[set j [string first [string index$guess $i]$word]] != -1} {
incr cows
set word [string replace $word$j $j -] } } puts "$cows cows"
}

proc yn {msg} {
while true {
puts -nonewline "$msg \[y/n] " gets stdin ans set char [string tolower [string index [string trim$ans] 0]]
if {$char eq "y" ||$char eq "n"} {
return $char } } } main  ## Transd Translation of: C++ #lang transd MainModule: { contains-duplicates: (λ s String() -> Bool() (with str String(s) (sort str) (ret (neq (find-adjacent str) (end str)))) ), play: (λ locals: syms "0123456789" len 4 thenum String() guess String() (shuffle syms) (= thenum (substr syms 0 len)) (textout "Your guess: ") (while (getline guess) (if (eq guess "q") break) (if (or (neq (size guess) len) (neq (find-first-not-of guess syms) -1) (contains-duplicates guess)) (lout guess " is not valid guess") (textout "Your guess: ") continue ) (with bulls 0 cows 0 pl 0 (for i in Range(len) do (= pl (index-of thenum (subn guess i))) (if (eq pl i) (+= bulls 1) elsif (neq pl -1) (+= cows 1)) ) (lout "bulls: " bulls ", cows: " cows) (if (eq bulls len) (lout "Congratulations! You have found out the number!") (ret null) else (textout "Your guess: ")) ) ) (lout "You quit the game.") ), _start: (λ locals: s String() (lout "Welcome to \"Bulls and cows\"!") (while true (while true (textout "Do you want to play? (yes|no) : ") (getline s) (if (not (size s)) (lout "Didn't receive an answer. Exiting.") (exit) elsif (== (sub (tolower s) 0 1) "n") (lout "Bye!")(exit) elsif (== (sub (tolower s) 0 1) "y") break else (lout "(Hint: \"yes\" or \"no\".)")) ) (play) (lout "Another game?") ) ) }  ## TUSCRIPT $$MODE tuscript SET nr1=RANDOM_NUMBERS (1,9,1) LOOP SET nr2=RANDOM_NUMBERS (1,9,1) IF (nr2!=nr1) EXIT ENDLOOP LOOP SET nr3=RANDOM_NUMBERS (1,9,1) IF (nr3!=nr1,nr2) EXIT ENDLOOP LOOP SET nr4=RANDOM_NUMBERS (1,9,1) IF (nr4!=nr1,nr2,nr3) EXIT ENDLOOP SET nr=JOIN(nr1,"'",nr2,nr3,nr4), limit=10 LOOP r=1,limit SET bulls=cows=0 ASK "round {r} insert a number":guessnr="" SET length=LENGTH(guessnr), checknr=STRINGS (guessnr,":>/:") LOOP n=nr,y=checknr IF (length!=4) THEN PRINT "4-letter digit required" EXIT ELSEIF (n==y) THEN SET bulls=bulls+1 ELSEIF (nr.ct.":{y}:") THEN SET cows=cows+1 ENDIF ENDLOOP PRINT "bulls=",bulls," cows=",cows IF (bulls==4) THEN PRINT "BINGO" EXIT ELSEIF (r==limit) THEN PRINT "BETTER NEXT TIME" EXIT ENDIF ENDLOOP Output: round 1 insert a number >1234 bulls=1 cows=1 round 2 insert a number >5678 bulls=1 cows=1 round 3 insert a number >1298 bulls=2 cows=0 round 4 insert a number >2379 bulls=0 cows=0 round 5 insert a number >1468 bulls=4 cows=0 BINGO  ## uBasic/4tH Local(2) ' Let's use no globals Proc _Initialize ' Get our secret number Do ' Repeat until it's guessed Do Input "Enter your guess: ";a@ ' Enter your guess While FUNC(_Invalid(a@)) ' but make sure it's a valid guess Loop a@ = FUNC(_Bulls) ' Count the number of bulls b@ = FUNC(_Cows) ' Count the number of cows ' Now give some feedback Print : Print "\tThere were ";a@;" bulls and ";b@;" cows." : Print Until a@ = 4 ' Until the secret is guessed Loop Print "You win!" ' Yes, you guessed it End _Initialize ' Make a secret Local (1) Do a@ = 1234 + RND(8643) ' Get a valid number While FUNC(_Invalid(a@)) ' and accept it unless invalid Loop For a@ = 0 to 3 ' Now save it at the proper place @(a@+4) = @(a@) Next Return _Invalid Param(1) ' Check whether a number is valid Local(2) ' Ok, these can't be right at all If (a@ < 1234) + (a@ > 9876) Then Return (1) ' Now break 'em up in different digits For b@ = 3 To 0 Step -1 @(b@) = a@ % 10 ' A digit of zero can't be right If @(b@) = 0 Then Unloop : Return (1) a@ = a@ / 10 Next For b@ = 0 To 2 ' Now compare all digits For c@ = b@ + 1 To 3 ' The others were already compared If @(b@) = @(c@) Then Unloop : Unloop : Return (1) Next ' Wrong, we found similar digits Next Return (0) ' All digits are different _Bulls ' Count the number of valid guesses Local (2) b@ = 0 ' Start with zero For a@ = 0 to 3 ' Increment with each valid guess If @(a@) = @(a@+4) Then b@ = b@ + 1 Next Return (b@) ' Return number of valid guesses _Cows Local (3) ' Count the number of proper digits c@ = 0 ' Start with zero For a@ = 0 To 3 ' All the players guesses For b@ = 4 To 7 ' All the computers secrets If (a@+4) = b@ Then Continue ' Skip the bulls If @(a@) = @(b@) Then c@ = c@ + 1 Next ' Increment with valid digits Next Return (c@) ' Return number of valid digits  The addition of strings allows for much simpler code. Do s = Str(1234 + RND(8643)) Until FUNC(_Check(s)) Next Do Do g = Ask("Enter your guess: ") If (Val(g) = Info("nil")) + (Len(g) # 4) Then Continue Until FUNC(_Check(g)) Loop b = 0 : c = 0 For i = 0 To 3 For j = 0 to 3 If Peek(s, i) = Peek(g, j) Then If i = j Then b = b + 1 Else c = c + 1 EndIf EndIf Next Next Print "You scored ";b;" bulls and ";c; " cows.\n" Until b = 4 Loop End _Check Param (1) Local (2) b@ = 0 For c@ = 0 To 3 If Peek(a@, c@) = Ord ("0") Then Unloop : Return (0) If And(b@, 2^(Peek(a@, c@) - Ord ("0"))) Then Unloop : Return (0) b@ = b@ + 2^(Peek(a@, c@) - Ord ("0")) Next Return (1)  ## UNIX Shell Works with: bash version 3 #!/bin/bash rand() { local min=${1:-0}
local max=${2:-32767} [${min} -gt ${max} ] && min=$(( min ^ max )) &&
max=$(( min ^ max )) && min=$(( min ^ max ))

echo -n $(( ($RANDOM % $max ) +$min ))
}

in_arr() {
local quandry="${1}" shift local arr=($@ )
local i=''

for i in ${arr[*]} do [ "${quandry}" == "${i}" ] && return 0 && break done return 1 } delete_at() { local idx="$(( $1 + 1 ))" shift local arr=( "sentinel"$@ )

echo -n "${arr[@]:1:$(( idx - 1 ))} ${arr[@]:$((idx + 1)):$((${#arr[@]} - idx - 1))}"
}

delete_first() {
local meanie="${1}" shift local arr=($@ )
local i=0

for (( i = 0; i < ${#arr[@]} ; i++ )) do [ "${arr[${i}]}" == "${meanie}" ] && arr=( $( delete_at${i} ${arr[*]} ) ) done echo -n "${arr[*]}"
}

to_arr() {
local string="${1}" local arr=() while [ "${#string}" -gt 0 ]
do
arr=( ${arr[*]}${string:0:1} )
string="${string:1}" done echo -n "${arr[*]}"
}

choose_idx() {
local arr=( $@ ) echo -n "$( rand 0 $((${#arr[@]} - 1 )) )"
}

locate_bulls() {
local secret=( $( to_arr "${1}" ) )
local guess=( $( to_arr "${2}" ) )
local hits=()
local i=0

for (( i=0; i<4; i++ ))
do
[ "${secret[${i}]}" -eq "${guess[${i}]}" ] && hits=( ${hits[*]}${i} )
done

echo -n "${hits[*]}" } bulls() { local secret="${1}"
local guess="${2}" local bulls=($( locate_bulls "${secret}" "${guess}" ) )

echo -n "${#bulls[@]}" } cows() { local secret=($( to_arr "${1}" ) ) local guess=($( to_arr "${2}" ) ) local bulls=($( locate_bulls "${1}" "${2}" ) )
local hits=0
local i=''

# Avoid double-counting bulls
for i in ${bulls[*]} do secret=($( delete_at ${i}${secret[*]} ) )
done

# Process the guess against what's left of the secret
for i in ${guess[*]} do in_arr "${i}" ${secret[*]} && secret=($( delete_first "${i}"${secret[*]} ) ) &&
(( hits++ ))
done

echo -n ${hits} } malformed() { local guess=($( to_arr "${1}" ) ) local i='' [${#guess[@]} -ne 4 ] &&
return 0

for i in ${guess[*]} do if ! in_arr${i} 1 2 3 4 5 6 7 8 9
then
return 0
break
fi
done

return 1
}

candidates=( 1 2 3 4 5 6 7 8 9 )
secret=''

while [ "${#secret}" -lt 4 ] do cidx=$( choose_idx ${candidates[*]} ) secret="${secret}${candidates[${cidx}]}"
candidates=( $(delete_at${cidx} ${candidates[*]} ) ) done while read -p "Enter a four-digit guess: " guess do malformed "${guess}" && echo "Malformed guess" && continue
[ "${guess}" == "${secret}" ] && echo "You win!" && exit
echo "Score: $( bulls "${secret}" "${guess}" ) Bulls,$( cows "${secret}" "${guess}" ) Cows"
done


## VBA

Option Explicit

Sub Main_Bulls_and_cows()
Dim strNumber As String, strInput As String, strMsg As String, strTemp As String
Dim boolEnd As Boolean
Dim lngCpt As Long
Dim i As Byte, bytCow As Byte, bytBull As Byte
Const NUMBER_OF_DIGITS As Byte = 4
Const MAX_LOOPS As Byte = 25 'the max of lines supported by MsgBox

strNumber = Create_Number(NUMBER_OF_DIGITS)
Do
bytBull = 0: bytCow = 0: lngCpt = lngCpt + 1
If lngCpt > MAX_LOOPS Then strMsg = "Max of loops... Sorry you loose!": Exit Do
If strInput = "Exit Game" Then strMsg = "User abort": Exit Do
For i = 1 To Len(strNumber)
If Mid(strNumber, i, 1) = Mid(strInput, i, 1) Then
bytBull = bytBull + 1
ElseIf InStr(strNumber, Mid(strInput, i, 1)) > 0 Then
bytCow = bytCow + 1
End If
Next i
If bytBull = Len(strNumber) Then
boolEnd = True: strMsg = "You win in " & lngCpt & " loops!"
Else
strTemp = strTemp & vbCrLf & "With : " & strInput & " ,you have : " & bytBull & " bulls," & bytCow & " cows."
MsgBox strTemp
End If
Loop While Not boolEnd
MsgBox strMsg
End Sub

Function Create_Number(NbDigits As Byte) As String
Dim myColl As New Collection
Dim strTemp As String
Dim bytAlea As Byte

Randomize
Do
bytAlea = Int((Rnd * 9) + 1)
On Error Resume Next
If Err <> 0 Then
On Error GoTo 0
Else
strTemp = strTemp & CStr(bytAlea)
End If
Loop While Len(strTemp) < NbDigits
Create_Number = strTemp
End Function

Function AskToUser(NbDigits As Byte) As String
Dim boolGood As Boolean, strIn As String, i As Byte, NbDiff As Byte

Do While Not boolGood
strIn = InputBox("Enter your number (" & NbDigits & " digits)", "Number")
If StrPtr(strIn) = 0 Then strIn = "Exit Game": Exit Do
If strIn <> "" Then
If Len(strIn) = NbDigits Then
NbDiff = 0
For i = 1 To Len(strIn)
If Len(Replace(strIn, Mid(strIn, i, 1), "")) < NbDigits - 1 Then
NbDiff = 1
Exit For
End If
Next i
If NbDiff = 0 Then boolGood = True
End If
End If
Loop
End Function

## VBScript

VBS functions return variants. I use t to return a single error value or a pair bulls, cows on result
VBS does'nt have a continue so i used the classic do loop inside do loop in the main program

randomize timer
fail=array("Wrong number of chars","Only figures 0 to 9 allowed","Two or more figures are the same")
p=dopuzzle()
wscript.echo "Bulls and Cows. Guess my 4 figure number!"
do
do
c=checkinput(s)
if not isarray (c) then wscript.stdout.write fail(c) :exit do
bu=c(0)
wscript.stdout.write "bulls: " & c(0) & " | cows: " & c(1)
loop while 0
loop until bu=4
wscript.stdout.write vbcrlf & "You won! "

function dopuzzle()
dim b(10)
for i=1 to 4
do
r=fix(rnd*10)
loop until b(r)=0
b(r)=1:dopuzzle=dopuzzle+chr(r+48)
next
end function

function checkinput(s)
dim c(10)
bu=0:co=0
if len(s)<>4 then checkinput=0:exit function
for i=1 to 4
b=mid(s,i,1)
if instr("0123456789",b)=0 then checkinput=1 :exit function
if c(asc(b)-48)<>0 then checkinput=2 :exit function
c(asc(b)-48)=1
for j=1 to 4
if asc(b)=asc(mid(p,j,1)) then
if i=j then bu=bu+1 else co=co+1
end if
next
next
checkinput=array(bu,co)
end function

## Vedit macro language

Buf_Switch(Buf_Free)
#90 = Time_Tick                     // seed for random number generator
#91 = 10                            // random numbers in range 0 to 9
while (EOB_pos < 4) {               // 4 digits needed
Call("RANDOM")
BOF Ins_Char(Return_Value + '0')
Replace("(.)(.*)\1", "\1\2", REGEXP+BEGIN+NOERR)  // remove any duplicate
}

#3 = 0
repeat (99) {
Get_Input(10, "Guess a 4-digit number with no duplicate digits: ", NOCR)
if (Reg_Size(10) == 0) { Break }                // empty string = exit
Num_Eval_Reg(10)                                // check for numeric digits
if (Chars_Matched != 4) {
M("You should enter 4 numeric digits\n")
Continue
}

Goto_Pos(4)                                     // count bulls
Reg_Ins(10, OVERWRITE)
#1 = Search("(.)...\1", REGEXP+BEGIN+ALL+NOERR)

RS(10, "[", INSERT)                             // count cows
RS(10, "]", APPEND)
#2 = Search_Block(@10, 0, 4, REGEXP+BEGIN+ALL+NOERR) - #1

#3++
NT(#1, NOCR) M(" bulls,") NT(#2, NOCR) M(" cows\n")
if (#1 == 4) {
M("You won after") NT(#3, NOCR) M(" guesses!\n")
Break
}
}
Buf_Quit(OK)
Return

//--------------------------------------------------------------
// Generate random numbers in range 0 <= Return_Value < #91
//  #90 = Seed    (0 to 0x7fffffff)
//  #91 = Scaling (0 to 0x10000)

:RANDOM:
#92 = 0x7fffffff / 48271
#93 = 0x7fffffff % 48271
#90 = (48271 * (#90 % #92) - #93 * (#90 / #92)) & 0x7fffffff
Return ((#90 & 0xffff) * #91 / 0x10000)

## Visual Basic .NET

Imports System
Imports System.Text.RegularExpressions

Module Bulls_and_Cows
Function CreateNumber() As String
Dim random As New Random()
Dim sequence As Char() = {"1"c, "2"c, "3"c, "4"c, "5"c, "6"c, "7"c, "8"c, "9"c}

For i As Integer = 0 To sequence.Length - 1
Dim j As Integer = random.Next(sequence.Length)
Dim temp As Char = sequence(i) : sequence(i) = sequence(j) : sequence(j) = temp
Next

Return New String(sequence, 0, 4)
End Function

Function IsFourDigitNumber(ByVal number As String) As Boolean
Return Regex.IsMatch(number, "^[1-9]{4}$") End Function Sub Main() Dim chosenNumber As String = CreateNumber() Dim attempt As Integer = 0 Console.WriteLine("Number is chosen") Dim gameOver As Boolean = False Do attempt += 1 Console.WriteLine("Attempt #{0}. Enter four digit number: ", attempt) Dim number As String = Console.ReadLine() Do While Not IsFourDigitNumber(number) Console.WriteLine("Invalid number: type four characters. Every character must digit be between '1' and '9'.") number = Console.ReadLine() Loop Dim bulls As Integer = 0 Dim cows As Integer = 0 For i As Integer = 0 To number.Length - 1 Dim j As Integer = chosenNumber.IndexOf(number(i)) If i = j Then bulls += 1 ElseIf j >= 0 Then cows += 1 End If Next If bulls < chosenNumber.Length Then Console.WriteLine("The number '{0}' has {1} bulls and {2} cows", _ number, bulls, cows) Else gameOver = True End If Loop Until gameOver Console.WriteLine("The number was guessed in {0} attempts. Congratulations!", attempt) End Sub End Module  ## V (Vlang) import rand import os fn main() { valid := ['1','2','3','4','5','6','7','8','9'] mut value := []string{} mut guess, mut elem := '', '' mut cows, mut bulls := 0, 0 println('Cows and Bulls') println('Guess four digit numbers of unique digits in the range 1 to 9.') println('A correct digit, but not in the correct place is a cow.') println('A correct digit, and in the correct place is a bull.') // generate pattern for value.len < 4 { elem = rand.string_from_set('123456789', 1) if value.any(it == elem) == false { value << elem } } // start game input: for _ in 0..3 { guess = os.input('Guess: ').str() // deal with malformed guesses if guess.len != 4 {println('Please input a four digit number.') continue input} for val in guess { if valid.contains(val.ascii_str()) == false { {println('Please input a number between 1 to 9.') continue input} } if guess.count(val.ascii_str()) > 1 { {println('Please do not repeat the same digit.') continue input} } } // score guesses for idx, gval in guess { match true { gval.ascii_str() == value[idx] { bulls++ println('${gval.ascii_str()} was correctly guessed, and in the correct location! ')

}
gval.ascii_str() in value {
cows++
println('${gval.ascii_str()} was correctly quessed, but not in the exact location! ') } else {} } if bulls == 4 {println('You are correct and have won!!! Congratulations!!!') exit(0)} } println('score: bulls:$bulls cows: $cows') } println('Only 3 guesses allowed. The correct value was:$value')
println('Sorry, you lost this time, try again.')
}
Output:
Cows and Bulls
Guess four digit numbers of unique digits in the range 1 to 9.
A correct digit, but not in the correct place is a cow.
A correct digit, and in the correct place is a bull.
Guess: 2673
6 was correctly quessed, but not in the exact location!
score: bulls: 0 cows: 1
Guess: 1658
6 was correctly quessed, but not in the exact location!
5 was correctly quessed, but not in the exact location!
8 was correctly quessed, but not in the exact location!
score: bulls: 0 cows: 4
Guess: 6859
6 was correctly quessed, but not in the exact location!
8 was correctly guessed, and in the correct location!
5 was correctly quessed, but not in the exact location!
score: bulls: 1 cows: 6
Only 3 guesses allowed. The correct value was: ['5', '8', '4', '6']
Sorry, you lost this time, try again.


## VTL-2

10 I=1
20 J=1
30 :I)='/10*0+%
40 #=:I)=0*30+(0<:I)*70
50 #=:I)=:J)*20
60 J=J+1
70 #=J<I*50
80 I=I+1
90 #=4>I*20
100 ?="BULLS AND COWS"
110 ?="--------------"
120 ?=""
125 T=0
130 T=T+1
140 ?="GUESS? ";
150 G=?
160 #=G<1234+(G>9877)*510
170 I=8
180 G=G/10
190 :I)=%
200 I=I-1
210 #=4<I*180
220 #=:5)*:6)*:7)*:8)=0*510
230 I=6
240 J=5
250 #=:I)=:J)*510
260 J=J+1
270 #=J<I*250
280 I=I+1
290 #=I<9*240
300 B=0
310 C=0
320 I=1
330 B=:I)=:I+4)+B
340 J=1
350 C=(I=J=0)*(:I)=:J+4))+C
360 J=J+1
370 #=4>J*350
380 I=I+1
390 #=4>I*330
400 ?="BULLS: ";
410 ?=B
420 ?=", COWS: ";
430 ?=C
440 ?=""
450 #=B<4*130
460 ?=""
470 ?="YOU GOT IT IN ";
480 ?=T
490 ?=" TRIES!"
500 #=1000
510 ?="BAD GUESS - GUESS NEEDS TO BE 4 UNIQUE DIGITS WITHOUT ZEROES"
520 #=140
Output:
BULLS AND COWS
--------------

GUESS? 1234
BULLS: 0, COWS: 1
GUESS? 5678
BULLS: 0, COWS: 2
GUESS? 1978
BULLS: 1, COWS: 2
GUESS? 2978
BULLS: 1, COWS: 2
GUESS? 3978
BULLS: 1, COWS: 2
GUESS? 4978
BULLS: 1, COWS: 3
GUESS? 7984
BULLS: 1, COWS: 3
GUESS? 8947
BULLS: 4, COWS: 0

YOU GOT IT IN 8 TRIES!

## Wren

Translation of: Kotlin
Library: Wren-set
Library: Wren-ioutil
import "random" for Random
import "./set" for Set
import "./ioutil" for Input

var MAX_GUESSES = 20  // say
var r = Random.new()
var num
// generate a 4 digit random number from 1234 to 9876 with no zeros or repeated digits
while (true) {
num = (1234 + r.int(8643)).toString
if (!num.contains("0") && Set.new(num).count == 4) break
}

System.print("All guesses should have exactly 4 distinct digits excluding zero.")
System.print("Keep guessing until you guess the chosen number (maximum %(MAX_GUESSES) valid guesses).\n")
var guesses = 0
while (true) {
var guess = Input.text("Enter your guess : ")
if (guess == num) {
System.print("You've won with %(guesses+1) valid guesses!")
return
}
var n = Num.fromString(guess)
if (!n) {
System.print("Not a valid number")
} else if (guess.contains("-") || guess.contains("+") || guess.contains(".")) {
System.print("Can't contain a sign or decimal point")
} else if (guess.contains("e") || guess.contains("E")) {
System.print("Can't contain an exponent")
} else if (guess.contains("0")) {
System.print("Can't contain zero")
} else if (guess.count != 4) {
System.print("Must have exactly 4 digits")
} else if (Set.new(guess).count < 4) {
System.print("All digits must be distinct")
} else {
var bulls = 0
var cows  = 0
var i = 0
for (c in guess) {
if (num[i] == c) {
bulls = bulls + 1
} else if (num.contains(c)) {
cows = cows + 1
}
i = i + 1
}
System.print("Your score for this guess:  Bulls = %(bulls)  Cows = %(cows)")
guesses = guesses + 1
if (guesses == MAX_GUESSES) {
System.print("You've now had %(guesses) valid guesses, the maximum allowed")
return
}
}
}

Output:

Sample game:

All guesses should have exactly 4 distinct digits excluding zero.
Keep guessing until you guess the chosen number (maximum 20 valid guesses).

Your score for this guess:  Bulls = 1  Cows = 1
Your score for this guess:  Bulls = 0  Cows = 1
Your score for this guess:  Bulls = 2  Cows = 1
Your score for this guess:  Bulls = 2  Cows = 0
Your score for this guess:  Bulls = 3  Cows = 0
Your score for this guess:  Bulls = 2  Cows = 1
Your score for this guess:  Bulls = 3  Cows = 0
Your score for this guess:  Bulls = 3  Cows = 0
You've won with 9 valid guesses!


## XPL0

int Bulls, Cows, Secret(4), Guess(4), Guesses, Used, I, J, Done, Digit, Okay;
[Used:= 0;                      \generate secret random number using digits
for I:= 0 to 3 do               \ 1 to 9 without any repeated digits
[repeat Digit:= Ran(9)+1;
until (Used & 1<<Digit) = 0;
Used:= Used ! 1<<Digit;
Secret(I):= Digit + ^0;
];
Text(0, "Guess the secret number.^m^j");
Text(0, "Guesses must be four different digits, 1 to 9.^m^j");
Guesses:= 0;
loop    [Done:= false;          \main game loop
repeat  Text(0, "Enter your guess: ");  \get valid 4-digits from player
OpenI(0);  Used:= 0;  I:= 0;
loop    [Digit:= ChIn(0);
Okay:= Digit>=^1 and Digit<=^9;
Digit:= Digit & \$0F;    \convert ASCII to binary
if not Okay or Used & 1<<Digit then
[Text(0,
"Please enter four distinct digits, 1 thru 9.^m^j");
quit;
];
Guess(I):= Digit + ^0;
Used:= Used ! 1<<Digit;
I:= I+1;
if I = 4 then [Done:= true;  quit];
];
until Done;
Guesses:= Guesses+1;
Bulls:= 0;  Cows:= 0;
for I:= 0 to 3 do
for J:= 0 to 3 do
if Guess(I) = Secret(J) then
if I=J then Bulls:= Bulls+1
else Cows:= Cows+1;
Text(0, "Bulls: ");  IntOut(0, Bulls);
Text(0, " Cows: ");  IntOut(0, Cows);
CrLf(0);
if Bulls = 4 then quit;
];
Text(0, "Congratulations! You won in ");  IntOut(0, Guesses);
Text(0, " guesses.^m^j");
]
Output:
Guess the secret number.
Guesses must be four different digits, 1 to 9.
Bulls: 1 Cows: 1
Please enter four distinct digits, 1 thru 9.
Please enter four distinct digits, 1 thru 9.
Bulls: 1 Cows: 0


## zkl

Play one game:

d:=Dictionary(); do{ d[(1).random(10)]=True }while(d.len()<4);
abcd:=d.keys.shuffle();
while(1){
if(guess.len()!=4 or guess.unique().len()!=4) continue;
bulls:=abcd.zipWith('==,guess).sum(0);
cows:=guess.split("").enumerate()
.reduce('wrap(s,[(n,c)]){ s + (d.find(c,False) and abcd[n]!=c) },0);
if(bulls==4) { println("You got it!"); break; }
"%d bull%s and %d cow%s".fmt(bulls,s(bulls),cows,s(cows)).println();
}
fcn s(n){ (n!=1) and "s" or "" }
Output:
4 digits: 4,5,6,7
1 bull and 0 cows
4 digits: 1234
0 bulls and 2 cows
4 digits: 3528
You got it!