#include <stdio.h>
#include <iostream>	
using namespace std;					


void swap_numbers_using_pointers(int *num1, int *num2);

void swap_numbers_using_references(int &num1, int &num2);


int main()
{	

	int num1 = 1;
	int num2 = 2;


	// swap the numbers using pointers
	swap_numbers_using_pointers(&num1, &num2);

	// display numbers
	cout << "num1 = " << num1 << endl << "num2 = " << num2;


	cout << endl << endl;


	// swap the numbers using references
	swap_numbers_using_references(num1, num2);
	
	// display numbers
	cout << "num1 = " << num1 << endl << "num2 = " << num2;


	getchar(); // wait for a key to be pressed

	return 0; // return zero
}


void swap_numbers_using_pointers(int *num1, int *num2)
{
	int temp = *num1;
	*num1 = *num2;
	*num2 = temp;
}


void swap_numbers_using_references(int &num1, int &num2)
{ 
	int temp = num1;
	num1 = num2;
	num2 = temp;
}


/*

This tutorial compares the use of pointers and references.
The pointer and reference functions are taken from the two previous tutorials.
I published this extra tutorial just to let you see them together.

*/