Iata un exemplu:
== code(c) |

#include <stdio.h>

# include <cstdio>

int main(void) {

int main ( void ) {

    int a, b;

    freopen("adunare.in", "rt", stdin);
    freopen("adunare.out", "rt", stdout);

    freopen ( "adunare.in", "r", stdin ) ;
    freopen ( "adunare.out", "w", stdout ) ;

    scanf("%d%d", &a, &b);
    printf("%d\n", a+b);

    scanf ( "%d %d", &a, &b ) ;
    printf ( "%d\n", a + b ) ;

    return 0;

    return 0 ;

}
==