#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 init_month, int init_day, int init_year)
{
	if (init_month < 1 || init_month > 12) {
		cerr << "bad month " << init_month << "/" << init_day
			<< "/" << init_year << "\n";
		exit(EXIT_FAILURE);
	}

	if (init_day < 1 || init_day > length[init_month]) {
		cerr << "bad day " << init_month << "/" << init_day
			<< "/" << init_year << "\n";
		exit(EXIT_FAILURE);
	}
}

date0& date0::operator+=(int count)
{
	for (int i {0}; i < count; ++i) {
		++*this;   //(*this).operator++();
	}

	return *this;
}