datetime.h

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// DateTime.h: interface for the DateTime class.
//
//////////////////////////////////////////////////////////////////////

#include <iostream>
#include <strstream>
#include "Date.h"
#include "Time.h"

using namespace std;


class DateTime 
{
	friend istream& operator >> ( istream& is,DateTime& dt );
	friend ostream& operator << ( ostream& os,DateTime& dt );
public:
	DateTime();	
	DateTime(unsigned year,unsigned month,unsigned day,
		unsigned hour,unsigned minute,unsigned second);
	DateTime( const Date& date, const Time& time );	
	DateTime( char *dt );
	virtual ~DateTime();
public:
	const Date& getDate()	{	return date;	}
	const Time& getTime()	{	return time;	}
	bool operator == ( const DateTime& dt );	// check the first DateTime equal to the other.
	bool operator >  ( const DateTime& dt );	// check the first DateTime later than the follow
	bool operator <  ( const DateTime& dt );	// check the first DateTime earlier than the follow	
private:
	Time time;
	Date date;
};
istream& operator >> ( istream& is,DateTime& dt );
ostream& operator << ( ostream& os,DateTime& dt );