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

void f(const date& d);

int main()
{
	date today;
	f(today);

	f(today + 7);	//does not change the value of today
	f(today);

	(today + 7).print();
	cout << " has julian date " << (today + 7).julian() << ".\n";

	return EXIT_SUCCESS;
}

void f(const date& d)
{
	d.print();
	cout << " has julian date " << d.julian() << ".\n";
}