#include <iostream>

using namespace std;

int main() {
	void swap(int*, int*);

	int  i = 5, j = 10, k = 15;
	int  *intPtr = &k;

	cout << "Before swap: i = " << i << ", k = " << k 
		  << ", intPtr = " << intPtr << ", and *intPtr = " 
		  << *intPtr << "\n";

	swap(&i, &k);

	cout << "After swap: i = " << i << ", k = " << k 
		  << ", intPtr = " << intPtr << ", and *intPtr = " 
		  << *intPtr << "\n";

	cout << "Before swap: j = " << j << ", k = " << k 
		  << ", intPtr = " << intPtr << ", and *intPtr = " 
		  << *intPtr << "\n";

	swap(&j, intPtr);

	cout << "After swap: j = " << j << ", k = " << k 
		  << ", intPtr = " << intPtr << ", and *intPtr = " 
		  << *intPtr << "\n";

	return 0;
}

void swap (int *a, int *b) {
	int  t = *a;
	    *a = *b;
       *b =  t;
}