/*
 * Some functions from the HW
 * 
 * Ex. 4
 *  swap()
 *  
 *    # swap a,b
 *      tmp = *p
 *      *p = *q
 *      *q = tmp
 *
 *
 *  int *a;   /// int* a;

 *  int *f(int a, int b);        # f returns pointer to int
 *  (int *)f(int a, int b);      # same
 *
 *  int (*f)(int a, int b);      # f is pointer to 
 */

#include <stdio.h>

void swap(int *p, int *q);
 
int main(){
   int i, j;
   i = 5;
   j = 7;
   printf("i = %i, j = %i\n", i, j);
   swap(&i, &j);
   printf("i = %i, j = %i\n", i, j);
   return 0;
} 

void swap(int *p, int *q){
  // swap the values of the variables
  int temp = *p;
  *p = *q;
  *q = temp;
}