# Guess the number/With feedback

**Guess the number/With feedback**

You are encouraged to solve this task according to the task description, using any language you may know.

- The computer will choose a number between given set limits and asks the player for repeated guesses until the player guesses the target number correctly. At each guess, the computer responds with whether the guess was higher than, equal to, or less than the target - or signals that the input was inappropriate.

C.f: Guess the number/With Feedback (Player)

## Ada

<lang Ada>with Ada.Numerics.Discrete_Random; with Ada.Text_IO; procedure Guess_Number_Feedback is

procedure Guess_Number (Lower_Limit : Integer; Upper_Limit : Integer) is subtype Number is Integer range Lower_Limit .. Upper_Limit; package Number_IO is new Ada.Text_IO.Integer_IO (Number); package Number_RNG is new Ada.Numerics.Discrete_Random (Number); Generator : Number_RNG.Generator; My_Number : Number; Your_Guess : Number; begin Number_RNG.Reset (Generator); My_Number := Number_RNG.Random (Generator); Ada.Text_IO.Put_Line ("Guess my number!"); loop Ada.Text_IO.Put ("Your guess: "); Number_IO.Get (Your_Guess); exit when Your_Guess = My_Number; if Your_Guess > My_Number then Ada.Text_IO.Put_Line ("Wrong, too high!"); else Ada.Text_IO.Put_Line ("Wrong, too low!"); end if; end loop; Ada.Text_IO.Put_Line ("Well guessed!"); end Guess_Number; package Int_IO is new Ada.Text_IO.Integer_IO (Integer); Lower_Limit : Integer; Upper_Limit : Integer;

begin

loop Ada.Text_IO.Put ("Lower Limit: "); Int_IO.Get (Lower_Limit); Ada.Text_IO.Put ("Upper Limit: "); Int_IO.Get (Upper_Limit); exit when Lower_Limit < Upper_Limit; Ada.Text_IO.Put_Line ("Lower limit must be lower!"); end loop; Guess_Number (Lower_Limit, Upper_Limit);

end Guess_Number_Feedback;</lang>

## AutoHotkey

<lang AutoHotkey>MinNum = 1 MaxNum = 99999999999

Random, RandNum, %MinNum%, %MaxNum% Loop {

InputBox, Guess, Number Guessing, Please enter a number between %MinNum% and %MaxNum%:,, 350, 130,,,,, %Guess% If ErrorLevel ExitApp If Guess Is Not Integer { MsgBox, 16, Error, Invalid guess. Continue } If Guess Not Between %MinNum% And %MaxNum% { MsgBox, 16, Error, Guess must be a number between %MinNum% and %MaxNum%. Continue } If A_Index = 1 TotalTime = %A_TickCount% Tries = %A_Index% If Guess = %RandNum% Break If Guess < %RandNum% MsgBox, 64, Incorrect, The number guessed (%Guess%) was too low. If Guess > %RandNum% MsgBox, 64, Incorrect, The number guessed (%Guess%) was too high.

} TotalTime := Round((A_TickCount - TotalTime) / 1000,1) MsgBox, 64, Correct, The number %RandNum% was guessed in %Tries% tries, which took %TotalTime% seconds.</lang>

## Brat

<lang brat>number = random 10

p "Guess a number between 1 and 10."

until {

guess = ask("Guess: ").to_i

true? (guess.null? || { guess > 10 || guess < 1 }) { p "Please guess a number between 1 and 10."} { true? guess == number { p "Correct!"; true } { true? guess < number { p "Too low!" } { p "Too high!" } } }

}</lang>

## C

<lang c>#include <stdlib.h>

- include <stdio.h>
- include <time.h>

- define lower_limit 0
- define upper_limit 100

int main(){

int number, guess;

srand( time( 0 ) ); number = lower_limit + rand() % (upper_limit - lower_limit + 1);

printf( "Guess the number between %d and %d: ", lower_limit, upper_limit );

while( scanf( "%d", &guess ) == 1 ){ if( number == guess ){ printf( "You guessed correctly!\n" ); break; } printf( "Your guess was too %s.\nTry again: ", number < guess ? "high" : "low" ); }

return 0;

}</lang>

Demonstration:

Guess the number between 0 and 100: 50 Your guess was too low. Try again: 75 Your guess was too high. Try again: 63 Your guess was too high. Try again: 57 Your guess was too low. Try again: 60 Your guess was too high. Try again: 58 Your guess was too low. Try again: 59 You guessed correctly!

## C++

<lang cpp>#include <iostream>

- include <cstdlib>
- include <ctime>

int main() {

std::srand(std::time(0)); int lower, upper, guess; std::cout << "Enter lower limit: "; std::cin >> lower; std::cout << "Enter upper limit: "; std::cin >> upper; int random_number = lower + std::rand() % ((upper + 1) - lower);

do { std::cout << "Guess what number I have: "; std::cin >> guess; if (guess > random_number) std::cout << "Your guess is too high\n"; else if (guess < random_number) std::cout << "Your guess is too low\n"; else std::cout << "You got it!\n"; } while (guess != random_number);

return 0;

}</lang> Output:

Enter lower limit: 1 Enter upper limit: 100 Guess what number I have: 50 Your guess is too high Guess what number I have: 40 Your guess is too high Guess what number I have: 25 Your guess is too high Guess what number I have: 10 Your guess is too high Guess what number I have: 2 Your guess is too low Guess what number I have: 4 Your guess is too high Guess what number I have: 3 You got it!

## D

<lang d>import std.stdio, std.random, std.typecons, std.conv, std.string;

void main() {

immutable interval = tuple(1, 100);

writefln("Guess my target number that is between " ~ "%d and %d (inclusive).\n", interval.tupleof); immutable target = uniform!"[]"(interval.tupleof);

int answer = -1; for (int i = 1; ; i++) { writef("Your guess(%d): ", i); immutable string txt = stdin.readln().strip(); try { answer = to!int(txt); } catch (ConvException e) { writefln(" I don't understand your input '%s'?", txt); continue; } if (answer < interval[0] || answer > interval[1]) { writeln(" Out of range!"); continue; } if (answer == target) { writeln(" Ye-Haw!!"); break; } writeln(answer < target ? " Too low." : " Too high."); }

writeln("\nThanks for playing.");

}</lang> Sample game:

Guess my target number that is between 1 and 100 (inclusive). Your guess(1): 50 Too high. Your guess(2): 25 Too high. Your guess(3): 13 Too low. Your guess(4): 19 Too high. Your guess(5): 15 Too low. Your guess(6): 17 Too high. Your guess(7): 16 Ye-Haw!! Thanks for playing.

## C#

<lang csharp>using System;

class Program {

static void Main(string[] args) { const int from = 1; const int to = 10;

int randomNumber = new Random().Next(from, to); int guessedNumber;

Console.Write("The number is between {0} and {1}. ", from, to); while (true) { Console.Write("Make a guess: "); if (int.TryParse(Console.ReadLine(), out guessedNumber)) { if (guessedNumber == randomNumber) { Console.WriteLine("You guessed the right number!"); break; } else { Console.WriteLine("Your guess was too {0}.", (guessedNumber > randomNumber) ? "high" : "low"); } } else { Console.WriteLine("Input was not an integer."); } }

Console.WriteLine(); Console.WriteLine("Press any key to exit."); Console.ReadKey(); }

} </lang> Output:

The number is between 1 and 10. Make a guess: 1 Your guess was too low. Make a guess: 9 Your guess was too high. Make a guess: 5 Your guess was too low. Make a guess: 6 Your guess was too low. Make a guess: hello, world Input was not an integer. Make a guess: 7 You guessed the right number! Press any key to exit.

## Clojure

<lang clojure>(defn guess-run []

(let [start 1

end 100 target (+ start (rand-int (inc (- end start))))]

(printf "Guess a number between %d and %d" start end) (loop [i 1] (printf "Your guess %d:\n" i) (let [ans (read)]

(if (cond (not (number? ans)) (println "Invalid format") (or (< ans start) (> ans end)) (println "Out of range") (< ans target) (println "too low") (> ans target) (println "too high") :else true) (println "Correct") (recur (inc i)))))))</lang>

## Common Lisp

<lang lisp>(defun guess-the-number-feedback (&optional (min 1) (max 100))

(let ((num-guesses 0)

(num (+ (random (1+ (- max min))) min)) (guess nil))

(format t "Try to guess a number from ~:d to ~:d!~%" min max) (loop do (format t "Guess? ")

(incf num-guesses) (setf guess (read)) (format t "Your guess is ~[not a number.~;too small.~;too large.~;correct!~]~%" (cond ((not (numberp guess)) 0) ((< guess num) 1) ((> guess num) 2) ((= guess num) 3))) until (and (numberp guess) (= guess num)))

(format t "You got the number correct on the ~:r guess!~%" num-guesses)))

</lang> Output:

CL-USER> (guess-the-number-feedback 1 1024) Try to guess a number from 1 to 1,024! Guess? 512 Your guess is too small. Guess? 768 Your guess is too small. Guess? 896 Your guess is too large. Guess? 832 Your guess is too small. Guess? 864 Your guess is too large. Guess? 848 Your guess is too large. Guess? 840 Your guess is too large. Guess? 836 Your guess is correct! You got the number correct on the eighth guess!

## Delphi

<lang Delphi>program GuessTheNumber;

{$APPTYPE CONSOLE}

uses

SysUtils, Math;

const

// Set min/max limits min: Integer = 1; max: Integer = 10;

var

last, val, inp: Integer; s: string;

// Initialise new game procedure NewGame; begin // Make sure this number isn't the same as the last one repeat val := RandomRange(min,max); until val <> last;

// Save this number last := val; Writeln('Guess a number between ', min, ' and ', max, ' [Answer = ', val, ']'); end;

begin

// Initialise the random number generator with a random value Randomize;

// Initialise last number last := 0; // Initialise user input s :=;

// Start game NewGame;

// Loop repeat // User input Readln(s);

// Validate - checxk if input is a number if TryStrToInt(s,inp) then begin // Is it the right number? if (inp = val) then begin // Yes - request a new game Writeln('Correct! Another go? Y/N'); Readln(s); if SameText(s,'Y') then // Start new game NewGame else Exit; end else // Input too low/high if (inp < val) then Writeln('Too low! Try again...') else if (inp > val) then Writeln('Too high! Try again...'); end else // Input invalid if not SameText(s,'bored') then Writeln('Invalid input! Try again...'); until SameText(s,'bored');

end.
</lang>

## Ela

<lang ela>open random core console string datetime read

rnd' v = rnd s 1 v where s = milliseconds <| datetime.now!

start () =

match bound! with Some v = writen ("Guess a number from 1 to " ++ show v) $ guess <| rnd' v None = start!

bound () =

writen "What's the upper bound?" $ bound' <| readStr <| readn! where bound' v | v <= 0 = writen "Bound should be greater than 0." $ None | else = Some v

success v =

writen "Correct! Do you want to continue? (Y/N)" $ ask! where ask () = read <| upper <| readn! read "Y" = start! read "N" = writen "Bye!" read x = writen "Say what?" $ ask!

failed v n =

writen ("No, this is not " ++ show v ++ ". " ++ hint) $ guess n where hint | v < n = "Try bigger." | else = "Try smaller."

guess n = g <| readStr <| readn!

where g v | v == n = success v | else = failed v n

start!</lang>

## Euphoria

<lang euphoria>include get.e

constant lower_limit = 0, upper_limit = 100

integer number, guess number = rand(upper_limit-lower_limit+1)+lower_limit

printf(1,"Guess the number between %d and %d: ", lower_limit & upper_limit) while 1 do

guess = floor(prompt_number("", lower_limit & upper_limit)) if number = guess then puts(1,"You guessed correctly!\n") exit elsif number < guess then puts(1,"You guessed too high.\nTry again: ") else puts(1,"You guessed to low.\nTry again: ") end if

end while</lang>

## Fantom

<lang fantom> class Main {

public static Void main () { Int lowerLimit := 1 Int higherLimit := 100

Int target := (lowerLimit..higherLimit).random Int guess while (guess != target) { echo ("Enter a guess: ") try { // read in a line of input, and try to interpret as an Int guess = Env.cur.in.readLine.trim.toInt if (guess == target) { echo ("Well guessed!") } else if (guess < target) { echo ("Failed - your guess is too small") } else // if (guess > target) { echo ("Failed - your guess is too large") } } catch (Err e) { echo ("Your guess must be an integer") } } }

} </lang>

Sample game:

Enter a guess: 50 Failed - your guess is too small Enter a guess: 75 Failed - your guess is too large Enter a guess: 67 Failed - your guess is too large Enter a guess: 60 Failed - your guess is too large Enter a guess: 55 Failed - your guess is too large Enter a guess: 53 Failed - your guess is too small Enter a guess: 54 Well guessed!

## Fortran

<lang fortran>program Guess_a_number

implicit none integer, parameter :: limit = 100 integer :: guess, number real :: rnum write(*, "(a, i0, a)") "I have chosen a number between 1 and ", limit, & " and you have to try to guess it." write(*, "(a/)") "I will score your guess by indicating whether it is higher, lower or the same as that number" call random_seed call random_number(rnum) number = rnum * limit + 1 do write(*, "(a)", advance="no") "Enter quess: " read*, guess if(guess < number) then write(*, "(a/)") "That is lower" else if(guess > number) then write(*, "(a/)") "That is higher" else write(*, "(a)") "That is correct" exit end if end do

end program</lang> Output

I have chosen a number bewteen 1 and 100 and you have to try to guess it. I will score your guess by indicating whether it is higher, lower or the same as that number. Enter guess: 50 That is lower Enter guess: 75 That is higher Enter guess: 62 That is higher Enter guess: 57 That is correct

## Go

<lang go>package main

import (

"fmt" "math/rand" "time"

)

const lower, upper = 1, 100

func main() {

fmt.Printf("Guess integer number from %d to %d: ", lower, upper) rand.Seed(time.Now().Unix()) n := rand.Intn(upper-lower+1) + lower for guess := n; ; { switch _, err := fmt.Scan(&guess); { case err != nil: fmt.Println("\n", err, "So, bye.") return case guess < n: fmt.Print("Too low. Try again: ") case guess > n: fmt.Print("Too high. Try again: ") default: fmt.Println("Well guessed!") return } }

}</lang>

## Haskell

<lang haskell> import Control.Monad import System.Random

-- Repeat the action until the predicate is true. until_ act pred = act >>= pred >>= flip unless (until_ act pred)

answerIs ans guess =

case compare ans guess of LT -> putStrLn "Too high. Guess again." >> return False EQ -> putStrLn "You got it!" >> return True GT -> putStrLn "Too low. Guess again." >> return False

-- Repeatedly read until the input *starts* with a number. (Since -- we use "reads" we allow garbage to follow it, though.) ask = do line <- getLine

case reads line of ((num,_):_) -> return num otherwise -> putStrLn "Please enter a number." >> ask

main = do

ans <- randomRIO (1,100) :: IO Int putStrLn "Try to guess my secret number between 1 and 100." ask `until_` answerIs ans

</lang>

## Icon and Unicon

<lang Icon> procedure main()

smallest := 5 highest := 25 n := smallest-1 + ?(1+highest-smallest) repeat { writes("Pick a number from ", smallest, " through ", highest, ": ") guess := read () if n = numeric(guess) then { write ("Well guessed!") exit () } else if n < numeric(guess) then write ("Your guess is too high") else if n > numeric(guess) then write ("Your guess is too low") else write ("Did you enter a number?") }

end </lang>

Output:

$ ./guess-feedback Pick a number from 5 through 25: 10 Your guess is too low Pick a number from 5 through 25: 16 Your guess is too low Pick a number from 5 through 25: 20 Your guess is too low Pick a number from 5 through 25: 23 Your guess is too high Pick a number from 5 through 25: 22 Well guessed!

## J

<lang j>require 'misc' game=: verb define

assert. y -: 1 >. <.{.y n=: 1 + ?y smoutput 'Guess my integer, which is bounded by 1 and ',":y whilst. -. x -: n do. x=. {. 0 ". prompt 'Guess: ' if. 0 -: x do. 'Giving up.' return. end. smoutput (*x-n){::'You win.';'Too high.';'Too low.' end.

)</lang>

Note: in computational contexts, J programmers typically avoid loops. However, in contexts which involve progressive input and output and where event handlers are too powerful (too complicated), loops are probably best practice.

Example use:

<lang> game 100 Guess my integer, which is bounded by 1 and 100 Guess: 64 Too high. Guess: 32 Too low. Guess: 48 Too high. Guess: 40 Too low. Guess: 44 You win.</lang>

## Java

<lang Java>import java.util.Random; import java.util.Scanner; public class Main {

public static void main(String[] args) { Scanner scan = new Scanner(System.in); Random random = new Random(); long from = 1; long to = 100; int randomNumber = random.nextInt(to - from + 1) + from; int guessedNumber = 0;

System.out.printf("The number is between %d and %d.\n", from, to);

do { System.out.print("Guess what the number is: "); guessedNumber = scan.nextInt(); if (guessedNumber > randomNumber) System.out.println("Your guess is too high!"); else if (guessedNumber < randomNumber) System.out.println("Your guess is too low!"); else System.out.println("You got it!"); } while (guessedNumber != randomNumber); }

}</lang> Demonstration:

The number is between 1 and 100. Guess what the number is: 50 Your guess is too high! Guess what the number is: 25 Your guess is too high! Guess what the number is: 17 Your guess is too high! Guess what the number is: 10 Your guess is too high! Guess what the number is: 5 Your guess is too low! Guess what the number is: 7 You got it!

## JavaScript

<lang html4strict>Pick a number between 1 and 100.

<form id="guessNumber">

<input type="text" name="guess"> <input type="submit" value="Submit Guess">

</form>

<script type="text/javascript"></lang> <lang javascript>var number = Math.ceil(Math.random() * 100);

function verify() {

var guess = Number(this.elements.guess.value), output = document.getElementById('output'); if (isNaN(guess)) { output.innerHTML = 'Enter a number.'; } else if (number === guess) { output.innerHTML = 'You guessed right!'; } else if (guess > 100) { output.innerHTML = 'Your guess is out of the 1 to 100 range.'; } else if (guess > number) { output.innerHTML = 'Your guess is too high.'; } else if (guess < number) { output.innerHTML = 'Your guess is too low.'; } return false;

}

document.getElementById('guessNumber').onsubmit = verify;</lang> <lang html4strict></script></lang>

### Spidermonkey Version

<lang javascript>#!/usr/bin/env js

function main() {

guessTheNumber(1, 100);

}

function guessTheNumber(low, high) {

var num = randOnRange(low, high); var guessCount = 0; function checkGuess(n) { if (n < low || n > high) { print('That number is not between ' + low + ' and ' + high + '!'); return false; }

if (n == num) { print('You got it in ' + String(guessCount) + ' tries.'); return true; }

if (n < num) { print('Too low.'); } else { print('Too high.'); } return false; }

print('I have picked a number between ' + low + ' and ' + high + '. Try to guess it!'); while (true) { guessCount++; putstr(" Your guess: "); var n = parseInt(readline()); if (checkGuess(n)) break; }

}

function randOnRange(low, high) {

var r = Math.random(); return Math.floor(r * (high - low + 1)) + low;

}

main(); </lang>

Example session:

I have picked a number between 1 and 100. Try to guess it! Your guess: 50 Too low. Your guess: 75 Too high. Your guess: 62 Too high. Your guess: 56 Too low. Your guess: 58 Too high. Your guess: 57 You got it in 6 tries.

## Liberty BASIC

<lang lb> [start]

target = int( rnd( 1) * 100) +1

while 1

do input "Guess a whole number between 1 and 100. To finish, type 'exit' "; b$ if b$ ="exit" then print "Thank you for playing!": end c = val( b$) ok =( c =int( c)) and ( c >=1) and ( c <=100) if ok =0 then notice "Invalid data. Integers 1 to 100 only." loop until ok <>0

if c =target then print " You guessed correctly.": print: goto [start] if c <target then print " Your guess was too low." if c >target then print " Your guess was too high."

wend </lang>

## Locomotive Basic

<lang locobasic>10 CLS:RANDOMIZE TIME 20 PRINT "Please specify lower and upper limits":guess=0 30 INPUT " (must be positive integers) :", first, last 40 IF first<1 OR last<1 THEN 20 50 num=INT(RND*(last-first+1)+first) 60 WHILE num<>guess 70 INPUT "Your guess? ", guess 80 IF guess<num THEN PRINT "too small!" 90 IF guess>num THEN PRINT "too large!" 100 WEND 110 INPUT "That's correct! Another game (y/n)? ", yn$ 120 IF yn$="y" THEN 20 </lang>

Output:

## Logo

<lang logo>to guess [:max 100]

local "number make "number random :max local "guesses make "guesses 0

local "guess forever [ (type [Guess my number! \(range 1 -\ ] :max "\):\ ) make "guess first readlist ifelse (or (not numberp :guess) (lessp :guess 1) (greaterp :guess :max)) [ print sentence [Guess must be a number between 1 and] (word :max ".) ] [ make "guesses (:guesses + 1) ifelse lessp :guess :number [ print [Too low!] ] [ifelse equalp :guess :number [ (print [You got it in] :guesses "guesses!) stop ] [ print [Too high!] ]] ] ]

end </lang>

Sample run:? guess Guess my number! (range 1 - 100): 50 Too low! Guess my number! (range 1 - 100): 75 Too high! Guess my number! (range 1 - 100): 67 Too low! Guess my number! (range 1 - 100): 71 Too high! Guess my number! (range 1 - 100): 69 You got it in 5 guesses!

## Lua

<lang Lua>math.randomseed(os.time()) me_win=false my_number=math.random(1,10) while me_win==false do print "Guess my number from 1 to 10:" your_number = io.stdin:read'*l' if type(tonumber(your_number))=="number" then your_number=tonumber(your_number) if your_number>10 or your_number<1 then print "Your number was not between 1 and 10, try again." elseif your_number>my_number then print "Your number is greater than mine, try again." elseif your_number<my_number then print "Your number is smaller than mine, try again." elseif your_number==my_number then print "That was correct." me_win=true end else print "Your input was not a number, try again." end end </lang>

Output: Guess my number from 1 to 10: 4 Your number is smaller than mine, try again. Guess my number from 1 to 10: 8 Your number is greater than mine, try again. Guess my number from 1 to 10: 5 That was correct.

## Mirah

<lang mirah>def getInput:int

s = System.console.readLine() Integer.parseInt(s)

end

number = int(Math.random() * 10 + 1)

puts "Guess the number between 1 and 10"

guessed = false

while !guessed do

begin userNumber = getInput if userNumber == number guessed = true puts "You guessed it." elsif userNumber > number puts "Too high." else puts "Too low." end rescue NumberFormatException => e puts "Please enter an integer." end

end</lang>

## Modula-2

<lang modula2>MODULE guessf;

IMPORT InOut, Random, NumConv, Strings;

VAR number, guess : CARDINAL;

input : Strings.String; OK, Done : BOOLEAN;

BEGIN

number := Random.nr (1000); InOut.WriteString ("I have chosen a number below 1000; please try to guess it."); InOut.WriteLn; REPEAT REPEAT InOut.WriteString ("Enter your guess : "); InOut.WriteBf; InOut.ReadString (input); NumConv.Str2Num (guess, 10, input, OK); IF NOT OK THEN InOut.WriteString (input); InOut.WriteString (" is not a valid number..."); InOut.WriteLn END UNTIL OK; InOut.WriteString ("Your guess is "); IF number = guess THEN Done := TRUE; InOut.WriteString ("spot on!") ELSE Done := FALSE; IF guess > number THEN InOut.WriteString ("too high.") ELSE InOut.WriteString ("too low.") END END; InOut.WriteLn UNTIL Done; InOut.WriteString ("Thank you for playing; have a nice day!"); InOut.WriteLn

END guessf.</lang>

I have chosen a number below 1000; please try to guess it. Enter your guess : 500 Your guess is too low. Enter your guess : 750 Your guess is too high. Enter your guess : 625 Your guess is too high. Enter your guess : kwak kwak is not a valid number... Enter your guess : 531 Your guess is spot on! Thank you for playing; have a nice day!

## Nemerle

<lang Nemerle>using System; using System.Console;

module GuessHints {

Main() : void { def rand = Random(); def secret = rand.Next(1, 101); mutable guess = 0; def GetGuess() : int {Int32.Parse(ReadLine())} WriteLine("Guess a number between 1 and 100:"); do { guess = GetGuess(); match(guess.CompareTo(secret)) { |(-1) => WriteLine("Too low! Guess again:") |1 => WriteLine("Too high! Guess again:") |0 => WriteLine("Well guessed!") } } while (guess != secret) }

}</lang>

## NewLISP

<lang NewLISP>; guess-number-feedback.lsp

- oofoe 2012-01-19
- http://rosettacode.org/wiki/Guess_the_number/With_feedback

(seed (time-of-day)) ; Initialize random number generator from clock. (setq low -5

high 62 number (+ low (rand (- high low))) found nil

)

(print "I'm thinking of a number between " low " and " high ".")

(while (not found)

(print " What's your guess? ") (setq guess (int (read-line) 'bad)) (print (cond ((= 'bad guess) "That's not a number! Try again!") ((or (< guess low) (> guess high)) (string "My number is between " low " and " high ". Try again!")) ((< number guess) "Try a little lower...") ((> number guess) "Maybe a bit higher...") ((= number guess) (setq found true) "Exactly right!"))) )

(println "\nWell guessed! Congratulations!")

(exit)</lang>

Sample output:

I'm thinking of a number between -5 and 62. What's your guess? No idea. That's not a number! Try again! What's your guess? 99 My number is between -5 and 62. Try again! What's your guess? -5 Maybe a bit higher... What's your guess? 30 Try a little lower... What's your guess? 15 Try a little lower... What's your guess? 0 Maybe a bit higher... What's your guess? 3 Try a little lower... What's your guess? 1 Exactly right! Well guessed! Congratulations!

## OCaml

<lang ocaml>let rec _read_int() =

try read_int() with _ -> print_endline "Please give a cardinal numbers."; (* TODO: what is the correct word? cipher, digit, figure or numeral? *) _read_int() ;;

let () =

print_endline "Please give a set limits (two integers):"; let a = _read_int() and b = _read_int() in let a, b = if a < b then (a, b) else (b, a) in Random.self_init(); let target = a + Random.int (b - a) in Printf.printf "I have choosen a number between %d and %d\n%!" a b; print_endline "Please guess it!"; let rec loop () = let guess = _read_int() in if guess = target then begin print_endline "The guess was equal to the target.\nCongratulation!"; exit 0 end; if guess < a || guess > b then print_endline "The input was inappropriate." else if guess > target then print_endline "The guess was higher than the target." else if guess < target then print_endline "The guess was less than the target."; loop () in loop ()</lang>

Playing the game:

$ ocaml inapropriate.ml Please give a set limits (two integers): 3 7 I have choosen a number between 3 and 7 Please guess it! 6 The guess was higher than the target. 7 The guess was higher than the target. 8 The input was inappropriate. 3 The guess was less than the target. 4 The guess was equal to the target. Congratulation!

$ ocaml inapropriate.ml Please give a set limits (two integers): 2 6 I have choosen a number between 2 and 6 Please guess it! three Please give a cardinal numbers.

## PARI/GP

<lang parigp>guess_the_number(N=10)={ a=random(N); print("guess the number between 0 and "N); for(x=1,N, if(x>1, if(b>a, print("guess again lower") , print("guess again higher") ); b=input(); if(b==a,break()) ); print("You guessed it correctly") };</lang>

## ooRexx

While the program for REXX works perfectly well with ooRexx, here is a version written in an alternate (my) style.

Select instead of a series of If's simple comparison instead of strict different indentations. entering ? shows the number we are looking for

This program should, of course, also work with all other Rexxes <lang ooRexx> /*REXX program that plays the guessing (the number) game. */

low=1 /*lower range for the guessing game.*/

high=100 /*upper range for the guessing game.*/ try=0 /*number of valid attempts. */ r=random(1,100) /*get a random number (low-->high). */

do forever

say say "guess the number, it's between" low 'and' high '(inclusive)', 'or enter quit to end the game.' say pull g say g=space(g) Select When g=then iterateWhen g='QUIT' then exit When g='?' then Do Say 'The number you are looking for is' r Iterate End When \datatype(g,'W') then do call ser g "isn't a valid number" iterate end When g<low then do call ser g 'is below the lower limit of' low iterate end When g>high then do call ser g 'is above the higher limit of' high iterate end When g=r then do try=try+1 Leave End Otherwise Do try=try+1 if g>r then what='high' else what='low' say 'your guess of' g 'is too' what'.' end end end

say tries='tries' if try=1 then

say 'Congratulations!, you guessed the number in 1 try. Did you cheat?'

Else

say 'Congratulations!, you guessed the number in' try 'tries.'

say exit

ser: say; say '*** error ! ***'; say arg(1); say; return </lang>

## Pascal

See Delphi

## Perl

<lang Perl>sub prompt { my $prompt = shift; while (1) { print "\n", $prompt, ": "; # type ^D, q, quit, quagmire, etc to quit defined($_ = <STDIN>) and !/^\s*q/ or exit;

return $_ if /^\s*\d+\s*$/s; $prompt = "Please give a non-negative integer"; } }

my $tgt = int(rand prompt("Hola! Please tell me the upper bound") + 1); my $tries = 1;

$tries++, print "You guessed too ", ($_ == -1 ? "high" : "low"), ".\n" while ($_ = $tgt <=> prompt "Your guess");

print "Correct! You guessed it after $tries tries.\n";</lang>

## Perl 6

<lang perl6>my $maxnum = prompt("Hello, please give me an upper boundary: "); until 0 < $maxnum < Inf {

say "Oops! The upper boundary should be > 0 and not Inf"; $maxnum = prompt("Please give me a valid upper boundary: ");

}

my $count = 0; my $number = (1..$maxnum).pick;

say "I'm thinking of a number from 1 to $maxnum, try to guess it!"; repeat until my $guessed-right {

given prompt("Your guess: ") { when /^[e|q]/ { say 'Goodbye.'; exit; } when not 1 <= $_ <= $maxnum { say "You really should give me a number from 1 to $maxnum." } $count++; when $number { $guessed-right = True } when $number < $_ { say "Sorry, my number is smaller." } when $number > $_ { say "Sorry, my number is bigger." } }

} say "Great you guessed right after $count attempts!";</lang>

Hello, please give me an upper boundary: 10 I'm thinking of a number from 1 to 10, try to guess it! Your guess: 5 Sorry, my number is bigger. Your guess: 7 Sorry, my number is smaller. Your guess: 6 Great you guessed right after 3 attempts!

## PHP

<lang php> <?php

session_start();

if(isset($_SESSION['number'])) {

$number = $_SESSION['number'];

} else {

$_SESSION['number'] = rand(1,10);

}

if($_POST["guess"]){

$guess = htmlspecialchars($_POST['guess']);

echo $guess . "

";

if ($guess < $number)

{

echo "Your guess is too low"; }

elseif($guess > $number) {

echo "Your guess is too high"; }

elseif($guess == $number) {

echo "You got the correct number!"; }

} ?>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /> <title>Guess A Number</title> </head>

<body>
<form action="<?=$_SERVER['PHP_SELF'] ?>" method="post" name="guess-a-number">
<label for="guess">Guess A Number:</label>

<input type="text" name="guess" />
<input name="number" type="hidden" value="<?= $number ?>" />
<input name="submit" type="submit" />
</form>
</body>
</html>
</lang>

## PicoLisp

<lang PicoLisp>(de guessTheNumber ()

(use (Low High Guess) (until (and (prin "Enter low limit : ") (setq Low (read)) (prin "Enter high limit: ") (setq High (read)) (> High Low) ) ) (seed (time)) (let Number (rand Low High) (loop (prin "Guess what number I have: ") (T (= Number (setq Guess (read))) (prinl "You got it!") ) (prinl "Your guess is too " (if (> Number Guess) "low" "high") "." ) ) ) ) )</lang>

Output:

: (guessTheNumber) Enter low limit : 1 Enter high limit: 64 Guess what number I have: 32 Your guess is too high. Guess what number I have: 16 Your guess is too low. Guess what number I have: 24 You got it!

## PureBasic

<lang PureBasic>OpenConsole()

Repeat

; Ask for limits, with sanity check Print("Enter low limit : "): low =Val(Input()) Print("Enter high limit: "): High =Val(Input())

Until High>low

TheNumber=Random(High-low)+low Debug TheNumber Repeat

Print("Guess what number I have: "): Guess=Val(Input()) If Guess=TheNumber PrintN("You got it!"): Break ElseIf Guess < TheNumber PrintN("Your guess is to low.") Else PrintN("Your guess is to high.") EndIf

ForEver</lang>

## Python

<lang python>import random

inclusive_range = (1, 100)

print("Guess my target number that is between %i and %i (inclusive).\n"

% inclusive_range)

target = random.randint(*inclusive_range) answer, i = None, 0 while answer != target:

i += 1 txt = input("Your guess(%i): " % i) try: answer = int(txt) except ValueError: print(" I don't understand your input of '%s' ?" % txt) continue if answer < inclusive_range[0] or answer > inclusive_range[1]: print(" Out of range!") continue if answer == target: print(" Ye-Haw!!") break if answer < target: print(" Too low.") if answer > target: print(" Too high.")

print("\nThanks for playing.")</lang>

**Sample Game**

Guess my target number that is between 1 and 100 (inclusive). Your guess(1): 50 Too high. Your guess(2): 25 Too low. Your guess(3): 40 Too high. Your guess(4): 30 Too low. Your guess(5): 35 Too high. Your guess(6): 33 Too high. Your guess(7): 32 Too high. Your guess(8): 31 Ye-Haw!! Thanks for playing.

**Sample trapped Errors**

Guess my target number that is between 1 and 100 (inclusive). Your guess(1): 0 Out of range! Your guess(2): 101 Out of range! Your guess(3): Howdy I don't understand your input of 'Howdy' ? Your guess(4):

## Retro

<lang Retro>: high|low ( gn-g$ )

over > [ "high" ] [ "low" ] if ;

- checkGuess ( gn-gf || f )

2over = [ "You guessed correctly!\n" puts 2drop 0 ] [ high|low "Sorry, your guess was too %s.\nTry again.\n" puts -1 ] if ;

- think ( -n )

random abs 100 mod 1+ ;

- guess ( - )

"I'm thinking of a number between 1 and 100.\n" puts "Try to guess it!\n" puts think [ getToken toNumber checkGuess ] while "You got it!\n" puts ;

</lang>

## REXX

To make the program more engaging, randomized words for the hint are used. <lang rexx>/*REXX program that plays the guessing (the number) game. */

low=1 /*lower range for guessing game. */

high=100 /*upper range for guessing game. */ try=0 /*number of valid attempts. */ r=random(1,100) /*get a random # (low ──> high).*/

lows='too_low too_small too_little below under underneath too_puny'

highs='too_high too_big too_much above over over_the_top too_huge' prompt=centre("guess the number, it's between" low 'and',

high '(inclusive) ───or─── Quit:',79,"─")

er!='*** error! ***'

do ask=0; say; say prompt; say; pull g; g=space(g); say do validate=0 select when g==then iterate askwhen abbrev('QUIT',g,1) then exit when words(g)\==1 then say er! 'too many numbers entered:' g when \datatype(g,'N') then say er! g "isn't numeric" when \datatype(g,'W') then say er! g "isn't a whole number" when g<low then say er! g 'is below the lower limit of' low when g>high then say er! g 'is above the higher limit of' high otherwise leave validate end /*select*/ iterate ask end /*validate*/

try=try+1 if g=r then leave if g>r then what=word(highs,random(1,words(highs))) else what=word( lows,random(1,words( lows))) say 'your guess of' g "is" translate(what'.',,"_") end /*ask*/

if try==1 then say 'Gadzooks!!! You guessed the number right away!'

else say 'Congratulations!, you guessed the number in' try "tries."</lang>

## Ruby

<lang ruby>number = rand(1..10)

puts "Guess the number between 1 and 10"

guessed = false

until guessed do

begin user_number = Integer(gets) if user_number == number guessed = true puts "You guessed it." elsif user_number > number puts "Too high." else puts "Too low." end rescue ArgumentError => e puts "Please enter an integer." end

end</lang>

## Scheme

<lang scheme>(define maximum 5) (define minimum -5) (define number (+ (random (- (+ maximum 1) minimum)) minimum))

(display "Pick a number from ") (display minimum) (display " through ") (display maximum) (display ".\n> ") (do ((guess (read) (read))) ((eq? guess number))

(if (or (>= guess maximum) (< guess minimum)) (display "Out of range!\n> ") (begin (if (> guess number) (display "Too high!\n> ")) (if (< guess number) (display "Too low!\n> ")))))

(display "Correct!\n")</lang>

## Seed7

<lang seed7>$ include "seed7_05.s7i";

const integer: lower_limit is 0; const integer: upper_limit is 100;

const proc: main is func

local var integer: number is 0; var integer: guess is 0; begin number := rand(lower_limit, upper_limit); write("Guess the number between " <& lower_limit <& " and " <& upper_limit <& ": "); readln(guess); while IN.io_ok and number <> guess do write("Your guess was too "); if number < guess then writeln("high."); else writeln("low."); end if; write("Try again: "); readln(guess); end while; if number = guess then writeln("You guessed correctly!"); else writeln("You gave up!"); end if; end func;</lang>

## Tcl

<lang tcl>set from 1 set to 10 set target [expr {int(rand()*($to-$from+1) + $from)}] puts "I have thought of a number from $from to $to." puts "Try to guess it!" while 1 {

puts -nonewline "Enter your guess: " flush stdout gets stdin guess if {![string is int -strict $guess] || $guess < $from || $guess > $to} {

puts "Your guess should be an integer from $from to $to (inclusive)."

} elseif {$guess > $target} {

puts "Your guess was too high. Try again!"

} elseif {$guess < $target} {

puts "Your guess was too low. Try again!"

} else {

puts "Well done! You guessed it." break

}

}</lang> Sample output:

I have thought of a number from 1 to 10. Try to guess it! Enter your guess: 2 Your guess was too low. Try again! Enter your guess: skfg Your guess should be an integer from 1 to 10 (inclusive). Enter your guess: 9 Your guess was too high. Try again! Enter your guess: 5 Your guess was too low. Try again! Enter your guess: 7 Your guess was too high. Try again! Enter your guess: 6 Well done! You guessed it.

## TUSCRIPT

<lang tuscript> $$ MODE TUSCRIPT PRINT "Find the luckynumber (7 tries)!" SET luckynumber=RANDOM NUMBERS (1,100,1) LOOP round=1,7 SET message=CONCAT ("[",round,"] Please insert a number") ASK $message: n=""

IF (n!='digits') THEN PRINT "wrong insert: ",n," Please insert a digit" ELSEIF (n>100.or.n<1) THEN PRINT "wrong insert: ",n," Please insert a number between 1-100" ELSEIF (n==#luckynumber) THEN PRINT "BINGO" EXIT ELSEIF (n.gt.#luckynumber) THEN PRINT "too big" ELSEIF (n.lt.#luckynumber) THEN PRINT "too small"

ENDIF IF (round==7) PRINT/ERROR "You've lost: luckynumber was: ",luckynumber ENDLOOP </lang> Output:

Find the luckynumber (7 tries)! [1] Please insert a number >51 too small [2] Please insert a number >76 too small [3] Please insert a number >89 too big [4] Please insert a number >80 too small [5] Please insert a number >84 too small [6] Please insert a number >86 too small [7] Please insert a number >88 too big @@@@@@@@ You've lost: luckynumber was: 87

## UNIX Shell

<lang sh>function guess {

-n $BASH_VERSION && shopt -s extglob -n $ZSH_VERSION && set -o KSH_GLOB local -i max=${1:-100} local -i number=RANDOM%max+1 local -i guesses=0

local guess while true; do echo -n "Guess my number! (range 1 - $max): " read guess if [[ "$guess" != +([0-9]) ]] || (( guess < 1 || guess > max )); then echo "Guess must be a number between 1 and $max." continue fi let guesses+=1 if (( guess < number )); then echo "Too low!" elif (( guess == number )); then echo "You got it in $guesses guesses!" break else echo "Too high!" fi done

}</lang>

Sample run:

$ guess Guess my number! (range 1 - 100): 50 Too low! Guess my number! (range 1 - 100): 75 Too high! Guess my number! (range 1 - 100): 62 Too low! Guess my number! (range 1 - 100): 69 Too low! Guess my number! (range 1 - 100): 72 You got it in 5 guesses!

## Vala

<lang vala> void main(){ const int from = 1; const int to = 100;

int random = Random.int_range(from, to); int guess = 0;

while (guess != random){ stdout.printf("Guess the target number that's between %d and %d.\n", from, to);

string? num = stdin.read_line (); num.canon("0123456789", '!'); // replaces any character in num that's not in "0123456789" with "!"

if ("!" in num) stdout.printf("Please enter a number!\n");

else{ guess = int.parse(num);

if (guess > random && guess <= to) stdout.printf("Too high!\n"); if (guess < random && guess >= from) stdout.printf("Too low!\n"); if (guess == random) stdout.printf("You guess it! You win!\n"); if (guess < from || guess > to) stdout.printf("%d Your guess isn't even in the right range!\n", guess); }

}//while } // main </lang>

Shorter but no error checking <lang vala>int main() {

int guess, x = Random.int_range(1, 10); stdout.printf("Make a guess (1-10): "); while((guess = int.parse(stdin.read_line())) != x) { stdout.printf("%s! Try again: ", x < guess ? "Lower" : "Higher"); } stdout.printf("Got it!\n"); return 0;

}</lang>

## XPL0

<lang XPL0>include c:\cxpl\codes; int Lo, Hi, C, Guess, Number;

[loop [Text(0, "Low limit: "); Lo:= IntIn(0);

Text(0, "High limit: "); Hi:= IntIn(0); if Lo < Hi then quit; Text(0, "Low limit must be lower!^M^J^G"); ];

Number:= Ran(Hi-Lo+1)+Lo; Text(0, "I'm thinking of a number between "); IntOut(0, Lo); Text(0, " and "); IntOut(0, Hi); Text(0, ".^M^J"); repeat Text(0, "Can you guess the number? ");

loop [C:= ChIn(0); if C>=^0 & C<=^9 then quit; Text(0, "Please enter a number in the given range.^M^J"); OpenI(0); ]; Backup; Guess:= IntIn(0); Text(0, if Guess = Number then "Correct!" else if Guess > Number then "Nope, too high." else "You're too low."); CrLf(0);

until Guess = Number; ]</lang>

Example output:

Low limit: 1 High limit: 10 I'm thinking of a number between 1 and 10. Can you guess the number? maybe Please enter a number in the given range. 3 You're too low. Can you guess the number? 6 You're too low. Can you guess the number? 8 Correct!

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