#include <cstdlib>
#include "date0.h"
using namespace std;

const int date0::length[] = {
	0,    //dummy entry so that january will have subscript 1
	31,   //january
	28,   //february
	31,   //march
	30,   //april
	31,   //may
	30,   //june
	31,   //july
	31,   //august
	30,   //september
	31,   //october
	30,   //november
	31    //december
};

date0::date0(int initial_month, int initial_day, int initial_year)
{
	if (initial_month < 1 || initial_month > 12) {
		cerr << "bad month " << initial_month << "/" << initial_day
			<< "/" << initial_year << "\n";
		exit(EXIT_FAILURE);
	}

	if (initial_day < 1 || initial_day > length[initial_month]) {
		cerr << "bad day " << initial_month << "/" << initial_day
			<< "/" << initial_year << "\n";
		exit(EXIT_FAILURE);
	}
}

date0& date0::operator+=(int count)
{
	while (--count >= 0) {
		++*this;   //(*this).operator++();
	}

	return *this;
}

date0& date0::operator++()
{
	cerr << "can't call date0::operator++\n";
	exit(EXIT_FAILURE);
}

void date0::print(ostream& ost) const
{
	cerr << "can't call date0::print\n";
	exit(EXIT_FAILURE);
}