/* Compare to ptr3.c, ptr4.c, and ptr6.c. */

void swap(int *p,int *q)
{
  int tmp;

  tmp = *p;
  *p = *q;
  *q = tmp;
}

int main(void)
{
  int x[1] = { 3 };
  int y[1] = { 11 };

  printf("%d %d\n",x[0],y[0]);
  swap(x,y);
  printf("%d %d\n",x[0],y[0]);
  return 0;
}