/* ECP: FILEname=fig14_10.cpp */
/* 1*/   // Simple Date class.  This is the interface.

/* 2*/   #include <iostream.h>

/* 3*/   enum Month { Jan, Feb, Mar, Apr, May, Jun,
/* 4*/                           Jul, Aug, Sep, Oct, Nov, Dec };

/* 5*/   class Date
/* 6*/   {
/* 7*/     public:
/* 8*/       enum { FirstYear = 1800 };
/* 9*/       enum { MaxYear   = 2100 };

/*10*/     private:
/*11*/       long int TotalDays;              // Since day zero.

/*12*/       static int DaysTillFirstOfMonth[ ];
/*13*/       static long int *DaysTillJan1;
/*14*/       void SetJan1Array( void );

/*15*/     public:
/*16*/       // Constructor.
/*17*/       Date( int Y = FirstYear, int M = 0, int D = 1 );

/*18*/       // Assignment Operator.
/*19*/       const Date & operator += ( long int Days );

/*20*/       // Unary Operators.
/*21*/       Date operator ++ ( );              // Prefix.
/*22*/       Date operator ++ ( int );          // Postfix.

/*23*/       // Binary Operators .
/*24*/       long int operator - ( const Date & Right ) const;
/*25*/       int operator < ( const Date & Right ) const;

/*26*/       // Friends for I/O.
/*27*/       friend ostream & operator <<
/*28*/           ( ostream & Output, const Date & TheDate );
/*29*/       friend istream & operator >>
/*30*/           ( istream & Input,  Date & TheDate );
/*31*/   };