#include <stdio.h>
#include <stdlib.h>

void inc(int *x, int *y) { (*x)++; (*y)++; }

int main(void)
{
    int *x, *y;
    int a=1, b=2;

    x = &a;
    y = &b;

    inc(x,y);

    printf("%i, %i\n",*y, *x);

    return 0;

}