cpp16.cpp

C++参考书

// Coded by plusir -- Dec.30.2002.
// Standard C++ Bible -- (P307-11-16)

#include <iostream>
using namespace std ;

class Time ;

class Date
{
	public:
		Date( int m = 0, int d = 0, int y = 0 )
		{
			month = m ;
			day = d ;
			year = y ;
		}

		friend void display( const Date &, const Time & ) ;

	private:
		int month ;
		int day ;
		int year ;
} ;

class Time
{
	public:
		Time( int h = 0, int m = 0, int s = 0 )
		{
			hour = h ;
			minute = m ;
			second = s ;
		}

		friend void display( const Date &, const Time & ) ;

	private:
		int hour ;
		int minute ;
		int second ;
} ;

void display( const Date &d, const Time &t )
{
	cout << d.month << '/' << d.day << '/' << d.year << " " ;
	cout << t.hour << ':' << t.minute << ':' << t.second << endl ;
}

int main()
{
	Date dt( 12, 30, 2002 ) ;
	Time tm( 13, 50, 46 ) ;

	display( dt, tm ) ;

	return 0 ;
}