/* p5.c

   swap_nums seems to work, but not swap_pointers. Fix it.

*/

void swap_nums(int *x, int *y) {
  int tmp;

  tmp = *x;
  *x = *y;
  *y = tmp;
}

void swap_pointers(char *x, char *y) {
  char *tmp;

  tmp = x;
  x = y;
  y = tmp;
}

int main() {
  int a,b;
  char *s1,*s2;

  a = 3; b=4;
  swap_nums(&a,&b);
  printf("a is %d\n",a);
  printf("b is %d\n",b);

  s1 = "I am s1 the great";
  s2 = "s2 rules";
  swap_pointers(s1,s2);
  printf("s1 is %s\n",s1);
  printf("s2 is %s\n",s2);

  return(0);
}