//#include <stdio.h>
#include <cstdio>

typedef struct _POINT {
  long x;
  long y;
} POINT;

POINT f(POINT p) {
  return p;
}

int main() {
  POINT p;
  p = f(POINT());
  printf("%ld, %ld\n", p.x, p.y);
  return 0;
}
/* end */

0, 0