#include <stdio.h>
void proc (int r)
{
    r = 5;
    printf ("r: %u, &r: %llu\n",
            r, (unsigned long int) &r);
}
int main()
{
    int a = 4;
    proc (a);
    printf("a: %u, &a: %lu\n",
           a, (unsigned long int) &a);

    return 0;
}