#define LESS -1

#define EQUAL 0

#define GREATER 1

// This is file DateType.h

// Here we declare the interface of a class so that we can

// store the information of dates in objects of the DateType class and

// call methods provided by these objects to process date information

// The actually implementation of the methods are inside DateType.cpp

class DateType

{

public: //The following members can be called anywhere

DateType();

//The first constructor method to initialize a DateType object

// initialize day, month, year in the object

// to 1, 1, and 2000 representing 1/1/2000

DateType(int newMonth, int newDay, int newYear);

//The second constructor method to initialize a DateType object

//Check whether newMonth, newDay, newYear compose a valid date first.

//If they do Not compose a valid date,

// initialize day, month, year in the object

// to 1, 1, and 2000 representing 1/1/2000

//If they do compose a valid date,

// use newMonth, newDay, newYear to update day, month, year in the object,

int YearIs(); // a method to returns year

int MonthIs(); // a method to returns month

int DayIs(); // a method to returns day

bool SetDate(int newMonth, int newDay, int newYear);

//A method to set a new date for the DateType object.

//Check whether newMonth, newDay, newYear compose a valid date first.

//If they do Not compose a valid date,

// do not change the date stored in the object and then return false.

//If they do compose a valid date,

// use newMonth, newDay, newYear to update day, month, year in the object,

// and then return true.

void ReadDate();

//A method to read in three integers and set them as the

// as the day, month, year of the DateType object to the console cout

void PrintDate();

//A method to output the contents of the DateType object to the console cout

int ComparedTo(DateType aDate);

// Pre: the object itself and aDate should have been initialized.

// Post:return value should be

// LESS, if the object itself comes before aDate.

// EQUAL, if the object itself is the same as aDate.

// GREATER, if the object itself comes after aDate.

int ComparedCentury(DateType aDate);

// Pre: Self and aDate have been initialized.

// Post: return

// LESS, if the object itSelf comes before the century of aDate.

// EQUAL, if the object itSelf is in the same century as aDate.

// GREATER, if the object itSelf comes after the century of aDate.

private: //The following members can be direclt accessed in DateType.cpp

int year;

int month;

int day;

};