#include <iostream>
#include <cstdlib>
#include "derived.h"
using namespace std;

int main()
{
	base b0 {10};
	base b1 {11};
	derived d0 {20, 30};
	derived d1 {21, 31};

	base *a[] {  //an array of pointers, can point to either base or derived
		&b0,
		&d0,
		&d1,
		&b1
	};
	const size_t n {size(a)};

	for (int i {0}; i < n; ++i) {
		a[i]->print();   //a[i] is a pointer
		cout << "\n";
	}

	return EXIT_SUCCESS;
}