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>
using namespace std;
int main()
{
  double a,b;
  
//  double result;
  while(cin>>a>>b)
  {
    cout<<a+b<<endl;
  }
  return 0;
}

Pascal :

var x,j,h,a:integer;
begin
  readln(x,j);
  readln(h,a);
  writeln(x+j);
  writeln(h+a);
end.