C :

#include <stdio.h>
int main()
{
	int a,b;
	while(scanf("%d%d",&a,&b)!=EOF)
	{
		printf("%d\n",a+b);
	}
	return 0;
}

C++ :

#include <iostream>
#include <cstdio>
using namespace std;
int main()
{
#ifndef ONLINE_JUDGE
	freopen("in.txt","r",stdin);
#endif
	int a,b;
	while(cin >>a >>b)
	{
		cout <<a+b <<endl;
	}
	return 0;
}

Pascal :

program abprob;
var
  a,b:longint;
begin
   readln(a,b);
   writeln(a+b);
end.

Java :

import java.util.*;
public class Main
{
	public static void main(String args[])
	{
		Scanner cin = new Scanner(System.in);
		int a,b;

		while(cin.hasNextInt())
		{
			a = cin.nextInt();
			b = cin.nextInt();
			System.out.println(a+b);
		}
	}
}

PHP :

<?php
$input = stream_get_contents(STDIN);
list($a, $b) = explode(' ', $input);
echo $a + $b;

Fortran :

PROGRAM P1000
			
IMPLICIT NONE
INTEGER :: A, B
 
READ(*,*) A, B
WRITE(*, '(I0)') A + B
 
END PROGRAM P1000
		

JavaScript :

process.stdin.resume();
process.stdin.setEncoding('utf-8');
var input = "";
var input_array = "";
process.stdin.on('data', function (data) {
    input += data;
});
function solveMeFirst(a, b) {
    return a + b;
}
process.stdin.on('end', function () {
    var arr = input.split("\n");
    for (var i=0; i<arr.length; i++) {
                                input_array=arr[i].split(" ");

            var inline = 0;
            var res;
            var _a = parseInt(input_array[inline], 10);
            inline += 1;

            var _b = parseInt(input_array[inline], 10);
            inline += 1;

            res = solveMeFirst(_a, _b);
            if(!isNaN(res) )process.stdout.write( res + "\n");
    }
});

Go :

package main
import "fmt"
import "io"
func main() {
  a:=0
  b:=0
  for {
  	_, err := fmt.Scanf("%d%d",&a,&b)
  	if err == io.EOF {
  		break
  	} else {
		fmt.Printf("%d\n",a+b)
	}
  }
}