#include <stdio.h>

int func(int *x, int *y)
{
  int n = *x + *y;
  return n;
}

int main(void)
{
  int x = 1;
  int y = 2;
  int n = x + y;
  printf("%d\n", n);

  n = func(&x, &y);
  printf("%d\n", n);
  return 0;
}