#include "stdafx.h"
#include <iostream>

using namespace std;

// C++ version
void swap(int &p, int &q)
{
	int temp;
	temp = p;
	p = q;
	q = temp;
}

int main()
{
	int a = 3, b = 5;
	swap(a, b);
	// want a=5, b=3
	return 0;
}