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

void f(int copy, int *p, const int& r);

int main()
{
	int i1 = 10;
	int i2 = 20;
	int i3 = 30;

	f(i1, &i2, i3);

	cout << "i1 == " << i1 << "\n"
		<< "i2 == " << i2 << "\n"
		<< "i3 == " << i3 << "\n";

	return EXIT_SUCCESS;
}

void f(int copy, int *p, const int& r)
{
	cout << "Arguments are " << copy << ", " << *p << ", " << r << ".\n";

	++copy;    //has no effect on i1
	++*p;      //add 1 to i2; means *p = *p + 1
	//++r;     //won't compile: r is a read-only reference
}