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

void f(const date& d);

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

	today += 7;	//changes the value of today
	f(today);

	f(today += 7);

	cout << "The julian date that is 7 days after ";
	(today += 7).print();
	cout << " is " << (today += 7).julian() << ".\n";

	f((today += 7) += 365);
	return EXIT_SUCCESS;
}

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