/*
 * Here we compare two ways of passing parameters.
 */

#include <iostream>
using namespace std;

void f1(int a)
{
	a += 10;
}

void f2(int &a)
{
	a += 10;
}

int main()
{
	int m = 15;
	cout << "m = " << m << endl;
	f1(m);
	cout << "m = " << m << endl;
	f2(m);
	cout << "m = " << m << endl;
}