date.h

/*************************************************************************
	This class, Date, is designed for the storage of dates.
	It expects to receive all dates in the m/d/y format, and it 
	outputs them in the same format. There are no restrictions on
	the year, but if the month entered falls outside the normal 
	bounds a bad_month exception is thrown. The input operator also
	checks the day entered against a list of permissable days in each
	month, and throws a bad_day exception if the day is outside 
	acceptable bounds. There is no mechanism for leap years so all
	Februaries are allowed 29 days. A full set of comparison operators
	is included with the class.
		John Dolan			Ohio University EECS	September 2005
		Patricia Lindner	Ohio University EECS	August 2021
*************************************************************************/

#include <iostream>
#include <ctype.h>

#ifndef DATE
#define DATE
// an exception if the date entered is invalid for the month
class bad_day
{
public:
    bad_day() { monthnum = daynum = 0; }
    bad_day(int m, int d) { monthnum = m, daynum = d; }
    void msg() { std::cerr << monthnum << " has no day " << daynum << std::endl; }

private:
    int monthnum, daynum;
};

// an exception for an invalid month number
class bad_month
{
public:
    bad_month() { monthnum = 0; }
    bad_month(int m) { monthnum = m; }
    void msg() { std::cerr << monthnum << " is an invalid month number.\n"; }

private:
    int monthnum;
};

// a simple class for holding dates
class Date
{
public:
    Date();
    Date(int d, int m, int y);

    // outputs the date
    friend std::ostream &operator<<(std::ostream &outs, Date d);

    //inputs the date
    friend std::istream &operator>>(std::istream &ins, Date &d);

    /**************************************************
        COMPARSION OPERATORS
**************************************************/
    friend bool operator>(const Date &d1, const Date &d2);

    friend bool operator<(const Date &d1, const Date &d2);

    friend bool operator==(const Date &d1, const Date &d2);

    friend bool operator!=(const Date &d1, const Date &d2);

    friend bool operator<=(const Date &d1, const Date &d2);

    friend bool operator>=(const Date &d1, const Date &d2);

private:
    int day;
    int month;
    int year;
    int daysallowed[13];
};

#endif