Iată un exemplu:
== code(c) |

# include <cstdio>

# include <stdio.h>

int a, b ;

}
==

== code(cpp) |
# include <fstream>
 
int a, b ;
 
int main ( void ) {
    std :: ifstream f ( "adunare.in" ) ;
    std :: ofstream g ( "adunare.out" ) ;
 
    f >> a >> b ;
    g << a + b ;
}
==
 

== code(pas) |
program adunare ;