#include <cstdlib>   //for div
#include "fastdate.h"
using namespace std;

fastdate& fastdate::operator++()
{
	if (++day > length[month]) {
		day = 1;
		if (++month > december) {
			month = january;
			++year;
		}
	}

	return *this;
}

fastdate& fastdate::operator+=(int count)
{
	div_t d = div(count, 365);
	if (d.rem < 0) {   //Make sure remainder is non-negative.
		d.rem += 365;
		--d.quot;
	}

	year += d.quot;

	for (day += d.rem; day > length[month];) {
		day -= length[month];
		if (++month > december) {
			month = january;
			++year;
		}
	}

	return *this;
}