#include <iostream>
using namespace std;

int i;

void func1(int parm)
{
    parm = 111;
    cout << "In func1: parm = " << parm << endl;
}

void func2(int& parm)
{
    parm = 222;
    cout << "In func2: parm = " << parm << endl;
    cout << "In func2:    i = " << i    << endl;
}

int main()
{
    i = 0;
    cout << "In main before call to func1: i = " << i << endl;
    cout << endl;

    func1(i);
    cout << "In main after call to func1: i = " << i << endl;
    cout << endl;

    func2(i);
    cout << "In main after call to func2: i = " << i << endl;
}