#include <iostream>
#include <cstdlib>
using namespace std;

void f(int copy, int *p);

int main()
{
	int i = 10;
	int j = 20;

	f(i, &j);	//pass i by value, j by reference
	cout << "i == " << i << "\n"
		"&i == " << &i << "\n"
		<< "j == " << j << "\n";

	return EXIT_SUCCESS;
}

void f(int copy, int *p)
{
	++copy;	//has no affect on i
	++*p;	//add 1 to j
}