// File: pointer2.cpp
//
// Passing pointers as parameters.

#include <iostream>
using namespace std;

void swap (int *ptr1, int *ptr2) {
    int temp ;

    cout << "ptr1 = " << ptr1 << endl ;
    temp = *ptr1 ;
    *ptr1 = *ptr2 ;
    *ptr2 = temp ;
}


int main() {
   int n, m ;

   n = 3 ;
   m = 17 ;

   cout << "&n = " << &n << endl ;

   swap(&n, &m) ;

   cout << "n = " << n << ", m = " << m << endl ;

}