Arithmetic/Integer: Difference between revisions
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@echo %D% = %C%</lang> |
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=={{header|bc}}== |
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<lang bc>define f(a, b) { |
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"add: "; a + b |
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"sub: "; a - b |
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"mul: "; a * b |
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"div: "; a / b /* truncates toward zero */ |
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"mod: "; a % b /* same sign as first operand */ |
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"pow: "; a ^ b |
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}</lang> |
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Revision as of 01:58, 18 February 2011
You are encouraged to solve this task according to the task description, using any language you may know.
Basic Data Operation
This is a basic data operation. It represents a fundamental action on a basic data type.
You may see other such operations in the Basic Data Operations category, or:
Integer Operations
Arithmetic |
Comparison
Boolean Operations
Bitwise |
Logical
String Operations
Concatenation |
Interpolation |
Comparison |
Matching
Memory Operations
Pointers & references |
Addresses
Get two integers from the user, and then output the sum, difference, product, integer quotient and remainder of those numbers. Don't include error handling. For quotient, indicate how it rounds (e.g. towards 0, towards negative infinity, etc.). For remainder, indicate whether its sign matches the sign of the first operand or of the second operand, if they are different.
Also include the exponentiation operator if one exists.
6502 Assembly
Code is called as a subroutine (i.e. JSR Arithmetic). Specific OS/hardware routines for user input and printing are left unimplemented. <lang 6502asm>Arithmetic: PHA ;push accumulator and X register onto stack TXA PHA JSR GetUserInput ;routine not implemented ;two integers now in memory locations A and B ;addition LDA A CLC ADC B JSR DisplayAddition ;routine not implemented
;subtraction LDA A SEC SBC B JSR DisplaySubtraction ;routine not implemented
;multiplication - overflow not handled LDA A LDX B Multiply: CLC ADC A DEX BNE Multiply JSR DisplayMultiply ;routine not implemented
;division - rounds up LDA A LDX #0 SEC Divide: INX SBC B BCS Divide TXA ;get result into accumulator JSR DisplayDivide ;routine not implemented
;modulus LDA A SEC Modulus: SBC B BCS Modulus ADC B JSR DisplayModulus ;routine not implemented
PLA ;restore accumulator and X register from stack TAX PLA RTS ;return from subroutine</lang> The 6502 has no opcodes for multiplication, division, or modulus; the routines for multiplication, division, and modulus given above can be heavily optimized at the expense of some clarity.
ABAP
<lang ABAP>report zz_arithmetic no standard page heading.
" Read in the two numbers from the user. selection-screen begin of block input.
parameters: p_first type i,
p_second type i.
selection-screen end of block input.
" Set the text value that is displayed on input request. at selection-screen output.
%_p_first_%_app_%-text = 'First Number: '. %_p_second_%_app_%-text = 'Second Number: '.
end-of-selection.
data: lv_result type i. lv_result = p_first + p_second. write: / 'Addition:', lv_result. lv_result = p_first - p_second. write: / 'Substraction:', lv_result. lv_result = p_first * p_second. write: / 'Multiplication:', lv_result. lv_result = p_first div p_second. write: / 'Integer quotient:', lv_result. " Truncated towards zero. lv_result = p_first mod p_second. write: / 'Remainder:', lv_result.</lang>
Ada
<lang ada>with Ada.Text_Io; with Ada.Integer_Text_IO;
procedure Integer_Arithmetic is
use Ada.Text_IO; use Ada.Integer_Text_Io;
A, B : Integer;
begin
Get(A);
Get(B);
Put_Line("a+b = " & Integer'Image(A + B));
Put_Line("a-b = " & Integer'Image(A - B));
Put_Line("a*b = " & Integer'Image(A * B));
Put_Line("a/b = " & Integer'Image(A / B) & ", remainder " & Integer'Image(A mod B));
Put_Line("a**b = " & Integer'Image(A ** B));
end Integer_Arithmetic;</lang>
Aikido
<lang aikido>var a = 0 var b = 0 stdin -> a // read int from stdin stdin -> b // read int from stdin
println ("a+b=" + (a + b)) println ("a-b=" + (a - b)) println ("a*b=" + (a * b)) println ("a/b=" + (a / b)) println ("a%b=" + (a % b))</lang>
ALGOL 68
<lang algol68>main:(
LONG INT a=355, b=113; printf(($"a+b = "gl$, a + b)); printf(($"a-b = "gl$, a - b)); printf(($"a*b = a×b = "gl$, a * b)); printf(($"a/b = "gl$, a / b)); printf(($"a OVER b = a%b = a÷b = "gl$, a % b)); printf(($"a MOD b = a%*b = a%×b = a÷×b = a÷*b = "gl$, a %* b)); printf(($"a UP b = a**b = a↑b = "gl$, a ** b))
)</lang> Output:
a+b = +468 a-b = +242 a*b = a×b = +40115 a/b = +3.141592920353982300884955752e +0 a OVER b = a%b = a÷b = +3 a MOD b = a%*b = a%×b = a÷×b = a÷*b = +16 a UP b = a**b = a↑b = +1.499007808785573768814747570e+288
ALGOL 68R has the curious (and consequently non-standard) /:= operator. This operator delivers two INTs as a result. eg.
INT quotient:=355, remainder; remainder := quotient /:= 113;
Giving a quotient of 3, and a remainder of 16.
AmigaE
<lang amigae>PROC main()
DEF a, b, t
WriteF('A = ')
ReadStr(stdin, t)
a := Val(t)
WriteF('B = ')
ReadStr(stdin, t)
b := Val(t)
WriteF('A+B=\d\nA-B=\d\n', a+b, a-b)
WriteF('A*B=\d\nA/B=\d\n', a*b, a/b)
/* * and / are 16 bit ops; Mul and Div are 32bit ops */
WriteF('A*B=\d\nA/B=\d\n', Mul(a,b), Div(a,b))
WriteF('A mod B =\d\n', Mod(a,b))
ENDPROC</lang>
AutoHotkey
The quotient rounds towards 0 if both inputs are integers or towards negative infinity if either input is floating point. The sign of the remainder is always the same as the sign of the first parameter (dividend). <lang autohotkey>Gui, Add, Edit, va, 5 Gui, Add, Edit, vb, -3 Gui, Add, Button, Default, Compute Gui, Show Return
ButtonCompute:
Gui, Submit MsgBox,% (Join`s"`n" a "+" b " = " a+b a "-" b " = " a-b a "*" b " = " a*b a "//" b " = " a//b " remainder " Mod(a,b) a "**" b " = " a**b )
- fallthrough
GuiClose:
ExitApp</lang>
AWK
<lang awk>/^[ \t]*-?[0-9]+[ \t]+-?[0-9]+[ \t]*$/ { print "add:", $1 + $2 print "sub:", $1 - $2 print "mul:", $1 * $2 print "div:", int($1 / $2) # truncates toward zero print "mod:", $1 % $2 # same sign as first operand print "exp:", $1 ** $2 exit }</lang>
For division and modulus, Awk should act like C.
BASIC
<lang qbasic>function math(a!, b!) print a + b print a - b print a * b print a / b print a mod b end function</lang> Truncate towards: 0
Remainder sign matches: first operand
Batch File
<lang dos>@set /P A=Enter 1st Number : @set /P B=Enter 2nd Number : @set D=%A% + %B% & call :printC @set D=%A% - %B% & call :printC @set D=%A% * %B% & call :printC @set D=%A% / %B% & call :printC @set D=%A% %% %B%
- printC
@set /A C=%D% @echo %D% = %C%</lang>
bc
<lang bc>define f(a, b) { "add: "; a + b "sub: "; a - b "mul: "; a * b "div: "; a / b /* truncates toward zero */ "mod: "; a % b /* same sign as first operand */ "pow: "; a ^ b }</lang>
Befunge
<lang befunge>&&00p"=A",,:."=B ",,,00g.55+,v
v,+55.+g00:,,,,"A+B="<
>"=B-A",,,,:00g-.55+,v
v,+55.*g00:,,,,"A*B="<
>"=B/A",,,,:00g/.55+,v
@,+55.%g00,,,,"A%B="<</lang>
Brat
Inspired by the second VBScript version. <lang brat>print "First number: " x = g.to_i print "Second number: " y = g.to_i
- Division uses floating point
- Remainder uses sign of right hand side
[:+ :- :* :/ :% :^].each { op |
p "#{x} #{op} #{y} = #{x.call_method op, y}"</lang>
C
<lang c>#include <stdio.h>
- include <stdlib.h>
int main(int argc, char *argv[]) {
int a, b;
if (argc < 3) exit(1);
b = atoi(argv[--argc]);
if (b == 0) exit(2);
a = atoi(argv[--argc]);
printf("a+b = %d\n", a+b);
printf("a-b = %d\n", a-b);
printf("a*b = %d\n", a*b);
printf("a/b = %d\n", a/b); /* truncates towards 0 (in C99) */
printf("a%%b = %d\n", a%b); /* same sign as first operand (in C99) */
return 0;
}</lang>
C++
<lang cpp>#include <iostream>
int main() {
int a, b; std::cin >> a >> b; std::cout << "a+b = " << a+b << "\n"; std::cout << "a-b = " << a-b << "\n"; std::cout << "a*b = " << a*b << "\n"; std::cout << "a/b = " << a/b << ", remainder " << a%b << "\n"; return 0;
}</lang>
C#
<lang csharp>using System;
class Program {
static void Main(string[] args)
{
int a = Convert.ToInt32(args[0]);
int b = Convert.ToInt32(args[1]);
Console.WriteLine("{0} + {1} = {2}", a, b, a + b);
Console.WriteLine("{0} - {1} = {2}", a, b, a - b);
Console.WriteLine("{0} * {1} = {2}", a, b, a * b);
Console.WriteLine("{0} / {1} = {2}", a, b, a / b); // truncates towards 0
Console.WriteLine("{0} % {1} = {2}", a, b, a % b); // matches sign of first operand
Console.WriteLine("{0} to the power of {1} = {2}", a, b, Math.Pow(a, b));
}
}</lang> Sample output: <lang>5 + 3 = 8 5 - 3 = 2 5 * 3 = 15 5 / 3 = 1 5 % 3 = 2 5 to the power of 3 = 125</lang>
Chef
<lang Chef>Number Soup.
Only reads single values.
Ingredients. 1 g Numbers 3 g Water 5 g Soup
Method. Take Numbers from refrigerator. Take Soup from refrigerator. Put Numbers into 1st mixing bowl. Add Soup into the 1st mixing bowl. Pour contents of the 1st mixing bowl into 1st baking dish. Clean 1st mixing bowl. Put Numbers into 1st mixing bowl. Remove Soup from 1st mixing bowl. Pour contents of the 1st mixing bowl into 2nd baking dish. Clean 1st mixing bowl. Put Numbers into 1st mixing bowl. Combine Soup into 1st mixing bowl. Pour contents of the 1st mixing bowl into 3rd baking dish. Clean 1st mixing bowl. Put Numbers into 1st mixing bowl. Divide Soup into 1st mixing bowl. Pour contents of the 1st mixing bowl into 4th baking dish. Clean 1st mixing bowl. Put Water into 1st mixing bowl. Verb the Soup. Combine Numbers into 1st mixing bowl. Verb the Soup until verbed. Pour contents of the 1st mixing bowl into 5th baking dish. Clean 1st mixing bowl.
Serves 5.</lang>
Clojure
<lang clojure>(defn myfunc []
(println "Enter x and y")
(let [x (read), y (read)]
(doseq [op '(+ - * / Math/pow rem)]
(let [exp (list op x y)]
(printf "%s=%s\n" exp (eval exp))))))</lang>
user=> (myfunc) Enter x and y 3 6 (+ 3 6)=9 (- 3 6)=-3 (* 3 6)=18 (/ 3 6)=1/2 (Math/pow 3 6)=729.0 (rem 3 6)=3 nil
Common Lisp
<lang lisp>(defun arithmetic (&optional (a (read *query-io*)) (b (read *query-io*)))
(mapc
(lambda (op)
(format t "~a => ~a~%" (list op a b) (funcall (symbol-function op) a b)))
'(+ - * mod rem floor ceiling truncate round expt))
(values))</lang>
Common Lisp's integer division functions are floor, ceiling, truncate, and round. They differ in how they round their quotient.
| The function | rounds its quotient towards |
|---|---|
floor
|
negative infinity |
ceiling
|
positive infinity |
truncate
|
zero |
round
|
the nearest integer (preferring the even integer if the mathematical quotient is equidistant from two integers) |
Each function also returns a remainder as its secondary value, such that
quotient * divisor + remainder = dividend .
(mod a b) and (rem a b) return numbers equal to the secondary values of (floor a b) and (truncate a b), respectively.
D
<lang d>import std.stdio, std.string;
void main() {
auto a = readln().atoi(), b = readln().atoi();
writefln("a + b = ", a+b);
writefln("a - b = ", a-b);
writefln("a * b = ", a*b);
writefln("a / b = ", a/b);
writefln("a % b = ", a%b);
}</lang>
E
<lang e>def arithmetic(a :int, b :int) {
return `$\
Sum: ${a + b}
Difference: ${a - b}
Product: ${a * b}
Quotient: ${a // b}
Remainder: ${a % b}$\n`
}</lang>
Efene
<lang efene>@public run = fn () {
First = io.get_line("First number: ")
Second = io.get_line("Second number: ")
A = list_to_integer(lists.delete($\n, First)) B = list_to_integer(lists.delete($\n, Second))
io.format("Sum: ~p~n", [A + B])
io.format("Difference: ~p~n", [A - B])
io.format("Product: ~p~n", [A * B])
io.format("Quotient: ~p~n", [A / B])
io.format("Remainder: ~p~n", [A % B])
}</lang>
Eiffel
In a file called main.e: <lang eiffel>class MAIN
creation make
feature make is
local
a, b: REAL;
do
print("a = ");
io.read_real;
a := io.last_real;
print("b = ");
io.read_real;
b := io.last_real;
print("a + b = ");
io.put_real(a + b);
print("%Na - b = ");
io.put_real(a - b);
print("%Na * b = ");
io.put_real(a * b);
print("%Na / b = ");
io.put_real(a / b);
print("%Na %% b = ");
io.put_real(((a / b) - (a / b).floor) * b);
print("%Na ^ b = ");
io.put_real(a.pow(b));
print("%N");
end
end</lang> Note that there actually is a builtin modulo operator (\\). However, it seems impossible to use that instruction with SmartEiffel.
Factor
<lang factor>USING: combinators io kernel math math.functions math.order math.parser prettyprint ;
"a=" "b=" [ write readln string>number ] bi@ {
[ + "sum: " write . ] [ - "difference: " write . ] [ * "product: " write . ] [ / "quotient: " write . ] [ /i "integer quotient: " write . ] [ rem "remainder: " write . ] [ mod "modulo: " write . ] [ max "maximum: " write . ] [ min "minimum: " write . ] [ gcd "gcd: " write . drop ] [ lcm "lcm: " write . ]
} 2cleave</lang>
output:
<lang factor>a=8 b=12 sum: 20 difference: -4 product: 96 quotient: 2/3 integer quotient: 0 remainder: 8 modulo: 8 maximum: 12 minimum: 8 gcd: 4 lcm: 24</lang>
This example illustrates the use of cleave and apply combinators to alleviate the usage of shuffle words in a concatenative language. bi@ applies a quotation to 2 inputs and 2cleave applies a sequence of quotations to 2 inputs.
FALSE
<lang false>12 7 \$@$@$@$@$@$@$@$@$@$@\ { 6 copies } "sum = "+." difference = "-." product = "*." quotient = "/." modulus = "/*-." "</lang>
Forth
To keep the example simple, the word takes the two numbers from the stack. /mod returns two results; the stack effect is ( a b -- a%b a/b ). <lang forth>: arithmetic ( a b -- )
cr ." a=" over . ." b=" dup . cr ." a+b=" 2dup + . cr ." a-b=" 2dup - . cr ." a*b=" 2dup * . cr ." a/b=" /mod . cr ." a mod b = " . cr ;</lang>
Different host systems have different native signed division behavior. ANS Forth defines two primitive double-precision signed division operations, from which the implementation may choose the most natural to implement the basic divide operations ( / , /mod , mod , */ ). This is partly due to differing specifications in the two previous standards, Forth-79 and Forth-83.
<lang forth>FM/MOD ( d n -- mod div ) \ floored SM/REM ( d n -- rem div ) \ symmetric M* ( n n -- d )</lang>
In addition, there are unsigned variants.
<lang forth>UM/MOD ( ud u -- umod udiv ) UM* ( u u -- ud )</lang>
Fortran
In ANSI FORTRAN 77 or later: <lang fortran> INTEGER A, B
PRINT *, 'Type in two integer numbers separated by white space',
+ ' and press ENTER'
READ *, A, B PRINT *, ' A + B = ', (A + B) PRINT *, ' A - B = ', (A - B) PRINT *, ' A * B = ', (A * B) PRINT *, ' A / B = ', (A / B) PRINT *, 'MOD(A,B) = ', MOD(A,B) PRINT * PRINT *, 'Even though you did not ask, ',
+ 'exponentiation is an intrinsic op in Fortran, so...'
PRINT *, ' A ** B = ', (A ** B) END</lang>
F#
As F# is a functional language, we can easily create a list of pairs of the string name of a function and the function itself to iterate over printing the operation and applying the function to obtain the result: <lang fsharp> do
let a, b = int Sys.argv.[1], int Sys.argv.[2] for str, f in ["+", ( + ); "-", ( - ); "*", ( * ); "/", ( / ); "%", ( % )] do printf "%d %s %d = %d\n" a str b (f a b)
</lang> For example, the output with the arguments 4 and 3 is: <lang fsharp> 4 + 3 = 7 4 - 3 = 1 4 * 3 = 12 4 / 3 = 1 4 % 3 = 1 </lang>
GAP
<lang gap>run := function()
local a, b, f;
f := InputTextUser();
Print("a =\n");
a := Int(Chomp(ReadLine(f)));
Print("b =\n");
b := Int(Chomp(ReadLine(f)));
Display(Concatenation(String(a), " + ", String(b), " = ", String(a + b)));
Display(Concatenation(String(a), " - ", String(b), " = ", String(a - b)));
Display(Concatenation(String(a), " * ", String(b), " = ", String(a * b)));
Display(Concatenation(String(a), " / ", String(b), " = ", String(QuoInt(a, b)))); # toward 0
Display(Concatenation(String(a), " mod ", String(b), " = ", String(RemInt(a, b)))); # nonnegative
Display(Concatenation(String(a), " ^ ", String(b), " = ", String(a ^ b)));
CloseStream(f);
end;</lang>
Go
<lang go>import "fmt" func arithmetic(a int, b int) {
fmt.Printf("a+b = %d\n", a+b)
fmt.Printf("a-b = %d\n", a-b)
fmt.Printf("a*b = %d\n", a*b)
fmt.Printf("a/b = %d\n", a/b) // truncates towards 0
fmt.Printf("a%%b = %d\n", a%b) // same sign as first operand
}</lang>
Groovy
<lang groovy>def arithmetic = { a, b ->
println """
a + b = ${a} + ${b} = ${a + b}
a - b = ${a} - ${b} = ${a - b}
a * b = ${a} * ${b} = ${a * b}
a / b = ${a} / ${b} = ${a / b} !!!
(int)(a / b) = (int)(${a} / ${b}) = ${(int)(a / b)} !!!
a.intdiv(b) = ${a}.intdiv(${b}) = ${a.intdiv(b)} !!!
a % b = ${a} % ${b} = ${a % b}
Exponentiation is also a base arithmetic operation in Groovy, so:
a ** b = ${a} ** ${b} = ${a ** b}
""" }</lang>
Program: <lang groovy>arithmetic(5,3)</lang>
Output:
a + b = 5 + 3 = 8
a - b = 5 - 3 = 2
a * b = 5 * 3 = 15
a / b = 5 / 3 = 1.6666666667 !!!
(int)(a / b) = (int)(5 / 3) = 1 !!!
a.intdiv(b) = 5.intdiv(3) = 1 !!!
a % b = 5 % 3 = 2
Exponentiation is also a base arithmetic operation in Groovy, so:
a ** b = 5 ** 3 = 125
Haskell
<lang haskell>main = do
a <- readLn :: IO Integer b <- readLn :: IO Integer putStrLn $ "a + b = " ++ show (a + b) putStrLn $ "a - b = " ++ show (a - b) putStrLn $ "a * b = " ++ show (a * b) putStrLn $ "a to the power of b = " ++ show (a ** b) putStrLn $ "a to the power of b = " ++ show (a ^ b) putStrLn $ "a to the power of b = " ++ show (a ^^ b) putStrLn $ "a `div` b = " ++ show (a `div` b) -- truncates towards negative infinity putStrLn $ "a `mod` b = " ++ show (a `mod` b) -- same sign as second operand putStrLn $ "a `divMod` b = " ++ show (a `divMod` b) putStrLn $ "a `quot` b = " ++ show (a `quot` b) -- truncates towards 0 putStrLn $ "a `rem` b = " ++ show (a `rem` b) -- same sign as first operand putStrLn $ "a `quotRem` b = " ++ show (a `quotRem` b)</lang>
haXe
Compile on Neko with <lang haxe>haxe -neko basic_integer_arithmetic.n -main BasicIntegerArithmetic</lang>
<lang haxe>class BasicIntegerArithmetic {
public static function main() {
var args = neko.Sys.args();
if (args.length < 2)
neko.Sys.exit(0);
var a = Std.int(args[0]);
var b = Std.int(args[1]);
trace("a+b = " + (a+b));
trace("a-b = " + (a-b));
trace("a*b = " + (a*b));
trace("a/b = " + (a/b));
trace("a%b = " + (a%b));
}
}</lang>
HicEst
All numeric is 8-byte-float. Conversions are by INT, NINT, FLOOR, CEILING, or Formatted IO <lang hicest>DLG(Edit=A, Edit=B, TItle='Enter numeric A and B') WRITE(Name) A, B WRITE() ' A + B = ', A + B WRITE() ' A - B = ', A - B WRITE() ' A * B = ', A * B WRITE() ' A / B = ', A / B ! no truncation WRITE() 'truncate A / B = ', INT(A / B) ! truncates towards 0 WRITE() 'round next A / B = ', NINT(A / B) ! truncates towards next integer WRITE() 'round down A / B = ', FLOOR(A / B) ! truncates towards minus infinity WRITE() 'round up A / B = ', CEILING(A / B) ! truncates towards plus infinity WRITE() 'remainder of A / B = ', MOD(A, B) ! same sign as A WRITE() 'A to the power of B = ', A ^ B WRITE() 'A to the power of B = ', A ** B</lang> <lang hicest>A=5; B=-4;
A + B = 1
A - B = 9
A * B = -20
A / B = -1.25
truncate A / B = -1 round next A / B = -1 round down A / B = -2 round up A / B = -1 remainder of A / B = 1 A to the power of B = 16E-4 A to the power of B = 16E-4 </lang>
Icon and Unicon
<lang Icon>procedure main() writes("Input 1st integer a := ") a := integer(read()) writes("Input 2nd integer b := ") b := integer(read())
write(" a + b = ",a+b) write(" a - b = ",a-b) write(" a * b = ",a*b) write(" a / b = ",a/b, " rounds toward 0") write(" a % b = ",a%b, " remainder sign matches a") write(" a ^ b = ",a^b) end</lang>
Inform 7
<lang inform7>Enter Two Numbers is a room.
Numerically entering is an action applying to one number. Understand "[number]" as numerically entering.
The first number is a number that varies.
After numerically entering for the first time: now the first number is the number understood.
After numerically entering for the second time: let A be the first number; let B be the number understood; say "[A] + [B] = [A + B]."; [operator syntax] say "[A] - [B] = [A minus B]."; [English syntax] let P be given by P = A * B where P is a number; [inline equation] say "[A] * [B] = [P]."; let Q be given by the Division Formula; [named equation] say "[A] / [B] = [Q]."; say "[A] mod [B] = [remainder after dividing A by B]."; end the story.
Equation - Division Formula Q = A / B where Q is a number, A is a number, and B is a number.</lang>
This solution shows four syntaxes: mathematical operators, English operators, inline equations, and named equations. Division rounds toward zero, and the remainder has the same sign as the quotient.
J
<lang j>calc =: + , - , * , <.@% , |~ , ^ labels =: ];.2 'Sum: Difference: Product: Quotient: Remainder: Exponentiation: ' combine =: ,. ":@,. bia =: labels combine calc</lang> Note that the verb calc produces all the processing specified for this problem, and that its output is of numeric type. <lang j> 17 calc 3 20 14 51 5 2 4913</lang>
Since other examples here provide textual output, bia produces like results.
<lang j> 17 bia 3 Sum: 20 Difference: 14 Product: 51 Quotient: 5 Remainder: 2 Exponentiation: 4913</lang>
Java
<lang java>import java.util.Scanner;
public static void main(String[] args){
Scanner sc = new Scanner(System.in);
int a = sc.nextInt();
int b = sc.nextInt();
int sum = a + b;//integer addition is discouraged in print statements due to confusion with String concatenation
System.out.println("a + b = " + sum);
System.out.println("a - b = " + (a - b));
System.out.println("a * b = " + (a * b));
System.out.println("quotient of a / b = " + (a / b)); // truncates towards 0
System.out.println("remainder of a / b = " + (a % b)); // same sign as first operand
}</lang>
JavaScript
Note that the operators work the same in all versions of JavaScript; the requirement for specific implementations is in order to get user input. <lang javascript>var a = parseInt(get_input("Enter an integer"), 10); var b = parseInt(get_input("Enter an integer"), 10);
WScript.Echo("a = " + a); WScript.Echo("b = " + b); WScript.Echo("sum: a + b = " + (a + b)); WScript.Echo("difference: a - b = " + (a - b)); WScript.Echo("product: a * b = " + (a * b)); WScript.Echo("quotient: a / b = " + (a / b | 0)); // "| 0" casts it to an integer WScript.Echo("remainder: a % b = " + (a % b));
function get_input(prompt) {
output(prompt);
try {
return WScript.StdIn.readLine();
} catch(e) {
return readline();
}
} function output(prompt) {
try {
WScript.Echo(prompt);
} catch(e) {
print(prompt);
}
}</lang> output:
Enter an integer -147 Enter an integer 63 a = -147 b = 63 sum: a + b = -84 difference: a - b = -210 product: a * b = -9261 quotient: a / b = -2 remainder: a % b = -21
Logo
<lang logo>to operate :a :b
(print [a =] :a) (print [b =] :b) (print [a + b =] :a + :b) (print [a - b =] :a - :b) (print [a * b =] :a * :b) (print [a / b =] int :a / :b) (print [a mod b =] modulo :a :b)
end</lang>
Each infix operator also has a prefix synonym (sum, difference, product, quotient). Sum and product can also have arity greater than two when used in parentheses (sum 1 2 3). Infix operators in general have high precedence; you may need to enclose their arguments in parentheses to obtain the correct expression.
LSE64
<lang lse64>over : 2 pick 2dup : over over
arithmetic : \
" A=" ,t over , sp " B=" ,t dup , nl \ " A+B=" ,t 2dup + , nl \ " A-B=" ,t 2dup - , nl \ " A*B=" ,t 2dup * , nl \ " A/B=" ,t 2dup / , nl \ " A%B=" ,t % , nl</lang>
Lua
<lang lua>local x = io.read() local y = io.read()
print ("Sum: " , (x + y)) print ("Difference: ", (x - y)) print ("Product: " , (x * y)) print ("Quotient: " , (x / y)) -- Does not truncate print ("Remainder: " , (x % y)) -- Result has sign of right operand print ("Exponent: " , (x ^ y))</lang>
M4
Because of the particular nature of M4, the only user-input is the code itself. Anyway the following code can be used: <lang m4>eval(A+B) eval(A-B) eval(A*B) eval(A/B) eval(A%B)</lang>
once saved in a file, e.g. operations.m4:
m4 -DA=4 -DB=6 operations.m4
or using a sort of driver:
<lang m4>define(`A', 4)dnl define(`B', 6)dnl include(`operations.m4')</lang>
Mathematica
Mathematica has all the function built-in to handle this task. Example: <lang Mathematica>a = Input["Give me an integer please!"]; b = Input["Give me another integer please!"]; Print["You gave me ", a, " and ", b]; Print["sum: ", a + b]; Print["difference: ", a - b]; Print["product: ", a b]; Print["integer quotient: ", IntegerPart[a/b]]; Print["remainder: ", Mod[a, b]]; Print["exponentiation: ", a^b];</lang> gives back for input 17 and 3: <lang Mathematica>You gave me 17 and 3 sum: 20 difference: 14 product: 51 integer quotient: 5 remainder: 2 exponentiation: 4913</lang>
MAXScript
<lang maxscript>x = getKBValue prompt:"First number" y = getKBValue prompt:"Second number:"
format "Sum: %\n" (x + y) format "Difference: %\n" (x - y) format "Product: %\n" (x * y) format "Quotient: %\n" (x / y) format "Remainder: %\n" (mod x y)</lang>
Metafont
<lang metafont>string s[]; message "input number a: "; s1 := readstring; message "input number b: "; s2 := readstring; a := scantokens s1; b := scantokens s2;
def outp(expr op) =
message "a " & op & " b = " & decimal(a scantokens(op) b) enddef;
outp("+"); outp("-"); outp("*"); outp("div"); outp("mod");
end</lang>
Modula-3
<lang modula3>MODULE Arith EXPORTS Main;
IMPORT IO, Fmt;
VAR a, b: INTEGER;
BEGIN
a := IO.GetInt();
b := IO.GetInt();
IO.Put("a+b = " & Fmt.Int(a + b) & "\n");
IO.Put("a-b = " & Fmt.Int(a - b) & "\n");
IO.Put("a*b = " & Fmt.Int(a * b) & "\n");
IO.Put("a DIV b = " & Fmt.Int(a DIV b) & "\n");
IO.Put("a MOD b = " & Fmt.Int(a MOD b) & "\n");
END Arith.</lang>
MUMPS
Note: M[UMPS] has an operator called "modulo". When both operands are positive numbers, "modulo" has a result that looks a lot like "remainder"; however, there is an important difference.
To better understand the intricacies of "modulo" and how it is different from "remainder", see Donald Knuth's definition (Volume 1 of the "big books"), or find out the beauty of cyclic algebra as formulated by Niels Henrik Abel (August 5, 1802 – April 6, 1829).
<lang MUMPS>Arith(first,second) ; Mathematical operators Write "Plus",?12,first,"+",second,?25," = ",first+second,! Write "Minus",?12,first,"-",second,?25," = ",first-second,! Write "Multiply",?12,first,"*",second,?25," = ",first*second,! Write "Divide",?12,first,"/",second,?25," = ",first/second,! Write "Int Divide",?12,first,"\",second,?25," = ",first\second,! Write "Power",?12,first,"**",second,?25," = ",first**second,! Write "Modulo",?12,first,"#",second,?25," = ",first#second,! Write "And",?12,first,"&",second,?25," = ",first&second,! Write "Or",?12,first,"!",second,?25," = ",first!second,! Quit
Do Arith(2,3) Plus 2+3 = 5 Minus 2-3 = -1 Multiply 2*3 = 6 Divide 2/3 = .6666666666666666667 Int Divide 2\3 = 0 Power 2**3 = 8 Modulo 2#3 = 2 And 2&3 = 1 Or 2!3 = 1
Do Arith(16,0.5) Plus 16+.5 = 16.5 Minus 16-.5 = 15.5 Multiply 16*.5 = 8 Divide 16/.5 = 32 Int Divide 16\.5 = 32 Power 16**.5 = 4 Modulo 16#.5 = 0 And 16&.5 = 1 Or 16!.5 = 1
Do Arith(0,2) Plus 0+2 = 2 Minus 0-2 = -2 Multiply 0*2 = 0 Divide 0/2 = 0 Int Divide 0\2 = 0 Power 0**2 = 0 Modulo 0#2 = 0 And 0&2 = 0 Or 0!2 = 1</lang>
NSIS
All Arithmetic in NSIS is handled by the IntOp instruction. It is beyond the scope of this task to implement user input (a fairly involved task), so I will be providing hard-coded values simulating the user input, with the intention of later adding the user-input piece. <lang nsis>Function Arithmetic Push $0 Push $1 Push $2 StrCpy $0 21 StrCpy $1 -2
IntOp $2 $0 + $1 DetailPrint "$0 + $1 = $2" IntOp $2 $0 - $1 DetailPrint "$0 - $1 = $2" IntOp $2 $0 * $1 DetailPrint "$0 * $1 = $2" IntOp $2 $0 / $1 DetailPrint "$0 / $1 = $2" DetailPrint "Rounding is toward negative infinity" IntOp $2 $0 % $1 DetailPrint "$0 % $1 = $2" DetailPrint "Sign of remainder matches the first number"
Pop $2 Pop $1 Pop $0 FunctionEnd</lang>
Objeck
<lang objeck>bundle Default {
class Arithmetic {
function : Main(args : System.String[]) ~ Nil {
DoArithmetic();
}
function : native : DoArithmetic() ~ Nil {
a := IO.Console->GetInstance()->ReadString()->ToInt();
b := IO.Console->GetInstance()->ReadString()->ToInt();
IO.Console->GetInstance()->Print("a+b = ")->PrintLine(a+b);
IO.Console->GetInstance()->Print("a-b = ")->PrintLine(a-b);
IO.Console->GetInstance()->Print("a*b = ")->PrintLine(a*b);
IO.Console->GetInstance()->Print("a/b = ")->PrintLine(a/b);
}
}
}</lang>
OCaml
<lang ocaml>let _ =
let a = read_int () and b = read_int () in
Printf.printf "a + b = %d\n" (a + b); Printf.printf "a - b = %d\n" (a - b); Printf.printf "a * b = %d\n" (a * b); Printf.printf "a / b = %d\n" (a / b); (* truncates towards 0 *) Printf.printf "a mod b = %d\n" (a mod b) (* same sign as first operand *)</lang>
Octave
<lang octave>disp("integer a: "); a = scanf("%d", 1); disp("integer b: "); b = scanf("%d", 1); a+b a-b a*b floor(a/b) mod(a,b)</lang>
Oz
<lang oz>declare
StdIn = {New class $ from Open.file Open.text end init(name:stdin)}
fun {ReadInt}
{String.toInt {StdIn getS($)}}
end
A = {ReadInt}
B = {ReadInt}
in
{ForAll
["A+B = "#A+B
"A-B = "#A-B
"A*B = "#A*B
"A/B = "#A div B %% truncates towards 0
"remainder "#A mod B %% has the same sign as A
"A^B = "#{Pow A B}
]
System.showInfo}</lang>
PARI/GP
<lang parigp>arith(a,b)={
print(a+b); print(a-b); print(a*b); print(a\b); print(a%b); print(a^b);
};</lang>
Pascal
<lang pascal>program arithmetic(input, output)
var
a, b: integer;
begin
readln(a, b);
writeln('a+b = ', a+b);
writeln('a-b = ', a-b);
writeln('a*b = ', a*b);
writeln('a/b = ', a div b, ', remainder ', a mod b);
end.</lang>
Perl
<lang perl>my $a = <>; my $b = <>;
"sum: ", $a + $b, "\n", "difference: ", $a - $b, "\n", "product: ", $a * $b, "\n", "integer quotient: ", int($a / $b), "\n", "remainder: ", $a % $b, "\n", "exponent: ", $a ** $b, "\n" ;</lang>
Perl 6
<lang perl6>my Int $a = floor $*IN.get; my Int $b = floor $*IN.get;
say 'sum: ', $a + $b; say 'difference: ', $a - $b; say 'product: ', $a * $b; say 'integer quotient: ', $a div $b; say 'remainder: ', $a % $b; say 'exponentiation: ', $a**$b;</lang>
Note that div doesn't always do integer division; it performs the operation "most appropriate to the
operand types". Synopsis 3 guarantees that div "on built-in integer types is equivalent to taking the floor of a real division". If you want integer division with other types, say floor($a/$b).
PHP
<lang php><?php $a = fgets(STDIN); $b = fgets(STDIN);
echo
"sum: ", $a + $b, "\n", "difference: ", $a - $b, "\n", "product: ", $a * $b, "\n", "truncating quotient: ", (int)($a / $b), "\n", "flooring quotient: ", floor($a / $b), "\n", "remainder: ", $a % $b, "\n";
?></lang>
PicoLisp
<lang PicoLisp>(de math (A B)
(prinl "Add " (+ A B)) (prinl "Subtract " (- A B)) (prinl "Multiply " (* A B)) (prinl "Divide " (/ A B)) # Trucates towards zero (prinl "Div/rnd " (*/ A B)) # Rounds to next integer (prinl "Modulus " (% A B)) # Sign of the first operand (prinl "Power " (** A B)) )</lang>
PL/I
<lang PL/I> get list (a, b); put skip list (a+b); put skip list (a-b); put skip list (a*b); put skip list (trunc(a/b)); put skip list (mod(a, b)); put skip list (rem(a, b)); </lang>
Pop11
<lang pop11>;;; Setup token reader vars itemrep; incharitem(charin) -> itemrep;
- read the numbers
lvars a = itemrep(), b = itemrep();
- Print results
printf(a + b, 'a + b = %p\n'); printf(a - b, 'a - b = %p\n'); printf(a * b, 'a * b = %p\n'); printf(a div b, 'a div b = %p\n'); printf(a mod b, 'a mod b = %p\n');</lang>
PostScript
<lang ps>/arithInteger {
/x exch def /y exch def x y add = x y sub = x y mul = x y idiv = x y mod = x y exp =
} def</lang>
PowerShell
<lang powershell>$a = [int] (Read-Host First Number) $b = [int] (Read-Host Second Number)
Write-Host "Sum: $($a + $b)" Write-Host "Difference: $($a - $b)" Write-Host "Product: $($a * $b)" Write-Host "Quotient: $($a / $b)" Write-Host "Quotient, round to even: $([Math]::Round($a / $b))" Write-Host "Remainder, sign follows first: $($a % $b)"</lang> Numbers are automatically converted to accomodate for the result. This means not only that Int32 will be expanded to Int64 but also that a non-integer quotient will cause the result to be of a floating-point type.
The remainder has the sign of the first operand.
No exponentiation operator exists, but can be worked around with the .NET BCL: <lang powershell>[Math]::pow($a, $b)</lang>
PureBasic
<lang purebasic>OpenConsole()
Define a, b
Print("Number 1: "): a = Val(Input()) Print("Number 2: "): b = Val(Input())
PrintN("Sum: " + Str(a + b)) PrintN("Difference: " + Str(a - b)) PrintN("Product: " + Str(a * b)) PrintN("Quotient: " + Str(a / b)) ; Integer division (rounding mode=truncate) PrintN("Remainder: " + Str(a % b)) PrintN("Power: " + Str(Pow(a, b)))
Input()
CloseConsole()</lang>
Python
<lang python>x = int(raw_input("Number 1: ")) y = int(raw_input("Number 2: "))
print "Sum: %d" % (x + y) print "Difference: %d" % (x - y) print "Product: %d" % (x * y) print "Quotient: %d" % (x / y) # or x // y for newer python versions.
# truncates towards negative infinity
print "Remainder: %d" % (x % y) # same sign as second operand print "Quotient: %d with Remainder: %d" % divmod(x, y) print "Power: %d" % x**y
- Only used to keep the display up when the program ends
raw_input( )</lang>
Notes: In Python3 raw_input() will be renamed to input() (the old input() built-in will go away, though one could use eval(input()) to emulate the old ... and ill-advised ... behavior). Also a better program would wrap the attempted int() conversions in a try: ... except ValueError:... construct such as:
<lang python>def getnum(prompt):
while True: # retrying ...
try:
n = int(raw_input(prompt))
except ValueError:
print "Input could not be parsed as an integer. Please try again."\
continue
break
return n
x = getnum("Number1: ") y = getnum("Number2: ") ...</lang>
(In general it's good practice to perform parsing of all input in exception handling blocks. This is especially true of interactive user input, but also applies to data read from configuration and other files, and marshaled from other processes via any IPC mechanism).
Python also has the procedure divmod that returns both quotient and remainder. eg
quotient, remainder = divmod(355,113)
Giving a quotient of 3, and a remainder of 16.
Python 3.0 compatible code
<lang python>def arithmetic(x, y):
for op in "+ - * // % **".split():
expr = "%(x)s %(op)s %(y)s" % vars()
print("%s\t=> %s" % (expr, eval(expr)))
arithmetic(12, 8)
arithmetic(input("Number 1: "), input("Number 2: "))</lang>
Output:
12 + 8 => 20 12 - 8 => 4 12 * 8 => 96 12 // 8 => 1 12 % 8 => 4 12 ** 8 => 429981696 Number 1: 20 Number 2: 4 20 + 4 => 24 20 - 4 => 16 20 * 4 => 80 20 // 4 => 5 20 % 4 => 0 20 ** 4 => 160000
R
<lang R>cat("insert number ") a <- scan(nmax=1, quiet=TRUE) cat("insert number ") b <- scan(nmax=1, quiet=TRUE) print(a+b) print(a-b) print(a*b) print(floor(a/b)) print(a%%b)</lang>
Raven
<lang raven>' Number 1: ' print expect 0 prefer as x ' Number 2: ' print expect 0 prefer as y
x y + " sum: %d\n" print x y - "difference: %d\n" print x y * " product: %d\n" print x y / " quotient: %d\n" print x y % " remainder: %d\n" print</lang>
REBOL
<lang rebol>REBOL [ Title: "Integer" Author: oofoe Date: 2010-09-29 URL: http://rosettacode.org/wiki/Arithmetic/Integer ]
x: to-integer ask "Please type in an integer, and press [enter]: " y: to-integer ask "Please enter another integer: " print ""
print ["Sum:" x + y] print ["Difference:" x - y] print ["Product:" x * y]
print ["Integer quotient (coercion) :" to-integer x / y] print ["Integer quotient (away from zero) :" round x / y] print ["Integer quotient (halves round towards even digits) :" round/even x / y] print ["Integer quotient (halves round towards zero) :" round/half-down x / y] print ["Integer quotient (round in negative direction) :" round/floor x / y] print ["Integer quotient (round in positive direction) :" round/ceiling x / y] print ["Integer quotient (halves round in positive direction):" round/half-ceiling x / y]
print ["Remainder:" r: x // y]
- REBOL evaluates infix expressions from left to right. There are no
- precedence rules -- whatever is first gets evaluated. Therefore when
- performing this comparison, I put parens around the first term
- ("sign? a") of the expression so that the value of /a/ isn't
- compared to the sign of /b/. To make up for it, notice that I don't
- have to use a specific return keyword. The final value in the
- function is returned automatically.
match?: func [a b][(sign? a) = sign? b]
result: copy [] if match? r x [append result "first"] if match? r y [append result "second"]
- You can evaluate arbitrary expressions in the middle of a print, so
- I use a "switch" to provide a more readable result based on the
- length of the /results/ list.
print [ "Remainder sign matches:" switch length? result [ 0 ["neither"] 1 [result/1] 2 ["both"] ] ]
print ["Exponentiation:" x ** y]</lang>
Sample output:
Please type in an integer, and press [enter]: 17 Please enter another integer: -4 Sum: 13 Difference: 21 Product: -68 Integer quotient (coercion) : -4 Integer quotient (away from zero) : -4 Integer quotient (halves round towards even digits) : -4 Integer quotient (halves round towards zero) : -4 Integer quotient (round in negative direction) : -5 Integer quotient (round in positive direction) : -4 Integer quotient (halves round in positive direction): -4 Remainder: 1 Remainder sign matches: first Exponentiation: 1.19730367213036E-5
Retro
Retro's arithmetic functions are based on those in Forth. The example is an adaption of the one from Forth.
<lang Retro>: arithmetic ( ab- )
cr "a = " puts over putn cr "b = " dup putn cr "a + b = " puts 2dup + putn cr "a - b = " puts 2dup - putn cr "a * b = " puts 2dup * putn cr "a / b = " puts /mod putn cr "a mod b = " puts putn cr ;</lang>
REXX
<lang rexx>say "enter 2 integer values separated by blanks" parse pull a b say a "+" b "=" a+b say a "-" b "=" a-b say a "*" b "=" a*b say a "/" b "=" a%b "remaining" a//b "(sign from first operand)" say a "^" b "=" a**b</lang> sample output:
enter 2 integer values separated by blanks 17 -4 17 + -4 = 13 17 - -4 = 21 17 * -4 = -68 17 / -4 = -4 remaining 1 (sign from first operand) 17 ^ -4 = 0.0000119730367
Ruby
<lang ruby>puts 'Enter x and y' x=gets.to_i # to check errors, use x=Integer(gets, 10) y=gets.to_i
puts "Sum: #{x+y}",
"Difference: #{x-y}",
"Product: #{x*y}",
"Quotient: #{x/y}", # truncates towards negative infinity
"Remainder: #{x%y}", # same sign as second operand
"Exponentiation: #{x**y}"</lang>
Scala
<lang scala>val a = Console.readInt val b = Console.readInt
val sum = a + b;//integer addition is discouraged in print statements due to confusion with String concatenation println("a + b = " + sum); println("a - b = " + (a - b)); println("a * b = " + (a * b)); println("quotient of a / b = " + (a / b)); // truncates towards 0 println("remainder of a / b = " + (a % b)); // same sign as first operand</lang>
Scheme
<lang scheme>(define (arithmetic x y)
(for-each (lambda (op)
(write (list op x y))
(display " => ")
(write ((eval op) x y))
(write-char #\newline))
'(+ - * / quotient remainder modulo max min gcd lcm)))
(arithmetic 8 12)</lang> quotient - truncates towards 0 remainder - same sign as first operand modulo - same sign as second operand
prints this: (+ 8 12) => 20 (- 8 12) => -4 (* 8 12) => 96 (/ 8 12) => 2/3 (quotient 8 12) => 0 (remainder 8 12) => 8 (modulo 8 12) => 8 (max 8 12) => 12 (min 8 12) => 8 (gcd 8 12) => 4 (lcm 8 12) => 24
Slate
<lang slate>[| :a :b | inform: (a + b) printString. inform: (a - b) printString. inform: (a * b) printString. inform: (a / b) printString. inform: (a // b) printString. inform: (a \\ b) printString.
] applyTo: {Integer readFrom: (query: 'Enter a: '). Integer readFrom: (query: 'Enter b: ')}.</lang>
Smalltalk
<lang smalltalk>| a b | 'Input number a: ' display. a := (stdin nextLine) asInteger. 'Input number b: ' display. b := (stdin nextLine) asInteger. ('a+b=%1' % { a + b }) displayNl. ('a-b=%1' % { a - b }) displayNl. ('a*b=%1' % { a * b }) displayNl. ('a/b=%1' % { a // b }) displayNl. ('a%%b=%1' % { a \\ b }) displayNl.</lang>
SNOBOL4
<lang snobol4>
output = "Enter first integer:" first = input
output = "Enter second integer:" second = input output = "sum = " first + second output = "diff = " first - second output = "prod = " first * second output = "quot = " (qout = first / second) output = "rem = " first - (qout * second) end</lang>
Standard ML
<lang sml>val () = let
val a = valOf (Int.fromString (valOf (TextIO.inputLine TextIO.stdIn))) val b = valOf (Int.fromString (valOf (TextIO.inputLine TextIO.stdIn)))
in
print ("a + b = " ^ Int.toString (a + b) ^ "\n");
print ("a - b = " ^ Int.toString (a - b) ^ "\n");
print ("a * b = " ^ Int.toString (a * b) ^ "\n");
print ("a div b = " ^ Int.toString (a div b) ^ "\n"); (* truncates towards negative infinity *)
print ("a mod b = " ^ Int.toString (a mod b) ^ "\n"); (* same sign as second operand *)
print ("a quot b = " ^ Int.toString (Int.quot (a, b)) ^ "\n");(* truncates towards 0 *)
print ("a rem b = " ^ Int.toString (Int.rem (a, b)) ^ "\n"); (* same sign as first operand *)
print ("~a = " ^ Int.toString (~a) ^ "\n") (* unary negation, unusual notation compared to other languages *)
end</lang>
SNUSP
As a BF derivative, SNUSP only has increment and decrement as native operations. Here are routines for other basic arithmetic upon single digit numbers and results.
See also: Ethiopian Multiplication <lang SNUSP>$\
, @ \=@@@-@-----# atoi > , @ \=@@@-@-----# < @ # 4 copies \=!/?!/->>+>>+>>+>>+<<<<<<<<?\# > | #\?<<<<<<<<+>>+>>+>>+>>-/ @ | \==/ \>>>>\ />>>>/ @ \==!/===?\# add < \>+<-/ @ \=@@@+@+++++# itoa . < @ \==!/===?\# subtract < \>-<-/ @ \=@@@+@+++++# . ! /\ ?- multiply \/ #/?<<+>+>-==\ /==-<+<+>>?\# /==-<<+>>?\# < \->+>+<<!/?/# #\?\!>>+<+<-/ #\?\!>>+<<-/ @ /==|=========|=====\ /-\ | \======<?!/>@/<-?!\>>>@/<<<-?\=>!\?/>!/@/<# < \=======|==========/ /-\ | @ \done======>>>!\?/<=/ \=@@@+@+++++# . ! /\ ?- zero \/ < divmod @ /-\ \?\<!\?/#!===+<<<\ /-\ | \<==@\>@\>>!/?!/=<?\>!\?/<<# | | | #\->->+</ | \=!\=?!/->>+<<?\# @ #\?<<+>>-/ \=@@@+@+++++# . < @ \=@@@+@+++++# . #</lang>
Tcl
<lang tcl>puts "Please enter two numbers:"
set x [expr {int([gets stdin])}]; # Force integer interpretation set y [expr {int([gets stdin])}]; # Force integer interpretation
puts "$x + $y = [expr {$x + $y}]" puts "$x - $y = [expr {$x - $y}]" puts "$x * $y = [expr {$x * $y}]" puts "$x / $y = [expr {$x / $y}]" puts "$x mod $y = [expr {$x % $y}]" puts "$x 'to the' $y = [expr {$x ** $y}]"</lang>
Since Tcl doesn't really know about the "type" of a variable, the "expr" command is used to declare whatever follows as an "expression". This means there is no such thing as "integer arithmetic" and hence the kludge with int([gets stdin]).
Often, these operations would be performed in a different way from what is shown here. For example, to increase the variable "x" by the value of the variable "y", one would write
<lang tcl>incr x $y</lang>
Also, it's important to surround the arguments to the expr in braces, especially when any of the parts of the expression are not literal constants. Discussion of this is on The Tcler's Wiki.
TI-89 BASIC
<lang ti89b>Local a, b Prompt a, b Disp "Sum: " & string(a + b) Disp "Difference: " & string(a - b) Disp "Product: " & string(a * b) Disp "Integer quotient: " & string(intDiv(a, b)) Disp "Remainder: " & string(remain(a, b))</lang>
Toka
<lang toka>[ ( a b -- )
2dup ." a+b = " + . cr 2dup ." a-b = " - . cr 2dup ." a*b = " * . cr 2dup ." a/b = " / . ." remainder " mod . cr
] is mathops</lang>
UNIX Shell
The Unix shell does not directly support arithmetic operations, so external tools, such as expr are used to perform arithmetic calculations when required:
<lang bash>#!/bin/sh read a; read b; echo "a+b = " `expr $a + $b` echo "a-b = " `expr $a - $b` echo "a*b = " `expr $a \* $b` echo "a/b = " `expr $a / $b` # truncates towards 0 echo "a mod b = " `expr $a % $b` # same sign as first operand</lang>
Notes: Using the ` (backtick operators, also available in most Bourne shells via the $(...) syntax) allows us to keep the results on their labels in the most efficient and portable way. The spaces around the operators in the expr command line arguments are required and the shell requires us to quote or escape the * character has shown, to prevent any possible "globbing" --- filename expansion of the * as a wildcard character.
With SUSv3 parameter expansions:
<lang bash>#!/bin/sh read a; read b; echo "a+b = $((a+b))" echo "a-b = $((a-b))" echo "a*b = $((a*b))" echo "a/b = $((a/b))" # truncates towards 0 echo "a mod b = $((a%b))" # same sign as first operand</lang>
Note: spaces inside the $((...)) are optional and not required; the $((...)) can be inside or outside the double quotes, but the `...` expressions from the previous example can also be inside or outside the double quotes.
Vedit macro language
<lang vedit>#1 = Get_Num("Give number a: ")
- 2 = Get_Num("Give number b: ")
Message("a + b = ") Num_Type(#1 + #2) Message("a - b = ") Num_Type(#1 - #2) Message("a * b = ") Num_Type(#1 * #2) Message("a / b = ") Num_Type(#1 / #2) Message("a % b = ") Num_Type(#1 % #2)</lang>
VBScript
VBScript's variables are all Variants. What starts out as an integer may be converted to something else if the need arises.
Implementation
<lang vb>option explicit dim a, b wscript.stdout.write "A? " a = wscript.stdin.readline wscript.stdout.write "B? " b = wscript.stdin.readline
a = int( a ) b = int( b )
wscript.echo "a + b=", a + b wscript.echo "a - b=", a - b wscript.echo "a * b=", a * b wscript.echo "a / b=", a / b wscript.echo "a \ b=", a \ b wscript.echo "a mod b=", a mod b wscript.echo "a ^ b=", a ^ b</lang>
Another Implementation
Gives the same output for the same input. Inspired by Python version. <lang vb>option explicit dim a, b wscript.stdout.write "A? " a = wscript.stdin.readline wscript.stdout.write "B? " b = wscript.stdin.readline
a = int( a ) b = int( b )
dim op for each op in split("+ - * / \ mod ^", " ") wscript.echo "a",op,"b=",eval( "a " & op & " b") next</lang>
Invocation
C:\foo>arithmetic.vbs A? 45 B? 11 a + b= 4511 a - b= 34 a * b= 495 a / b= 4.09090909090909 a \ b= 4 a mod b= 1 a ^ b= 1.5322783012207E+18
Visual Basic .NET
<lang vbnet>Imports System.Console Module Module1
Sub Main
Dim a = CInt(ReadLine)
Dim b = CInt(ReadLine)
WriteLine("Sum " & a + b)
WriteLine("Difference " & a - b)
WriteLine("Product " & a - b)
WriteLine("Quotient " & a / b)
WriteLine("Integer Quotient " & a \ b)
WriteLine("Remainder " & a Mod b)
WriteLine("Exponent " & a ^ b)
End Sub
End Module</lang>
XSLT
<lang xml><xsl:template name="arithmetic">
<xsl:param name="a">5</xsl:param> <xsl:param name="b">2</xsl:param> <fo:block>a + b = <xsl:value-of select="$a + $b"/></fo:block> <fo:block>a - b = <xsl:value-of select="$a - $b"/></fo:block> <fo:block>a * b = <xsl:value-of select="$a * $b"/></fo:block> <fo:block>a / b = <xsl:value-of select="round($a div $b)"/></fo:block> <fo:block>a mod b = <xsl:value-of select="$a mod $b"/></fo:block> </xsl:template></lang>
Yorick
<lang yorick>x = y = 0; read, x, y; write, "x + y =", x + y; write, "x - y =", x - y; write, "x * y =", x * y; write, "x / y =", x / y; // rounds toward zero write, "x % y =", x % y; // remainder; matches sign of first operand when operands' signs differ write, "x ^ y =", x ^ y; // exponentiation</lang>
- Programming Tasks
- Basic language learning
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