#ifndef DATE_H
#define DATE_H
#include <iostream>   //for class ostream (the class of the object cout)
using namespace std;

//This is the header file for class date.
//Jan  1, 0 AD is day   0
//Jan  2, 0 AD is day   1
//Dec 31, 0 AD is day 364
//Jan  1, 1 AD is day 365
//etc.
//so  day / 365 is the year
//and day % 365 is the day of the year (in the range 0 to 364 inclusive)

class date {
	int day;
	static const int length[12+1];
public:
	date(int m, int d, int y);
	date();   //Put today's date into the newborn object.
	
	//int operator-(const date& another) {return day - another.day;} //memb func
	friend int operator-(const date& d1, const date& d2) {return d1.day - d2.day;}

	friend bool operator==(const date& d1, const date& d2) {return d1.day == d2.day;}
	friend bool operator< (const date& d1, const date& d2) {return d1.day <  d2.day;}
	friend ostream& operator<<(ostream& ost, const date& d);
};

inline bool operator!=(const date& d1, const date& d2) {return !(d1 == d2);}
inline bool operator<=(const date& d1, const date& d2) {return d1 < d2 || d1 == d2;}
inline bool operator>=(const date& d1, const date& d2) {return !(d1 <  d2);}
inline bool operator> (const date& d1, const date& d2) {return !(d1 <= d2);}

#endif