cpp17.cpp

C++参考书

// Coded by plusir -- Dec.30.2002.
// Standard C++ Bible - (P309-11-17)

#include <iostream>
#include <string>
using namespace std ;

class Date
{
	public:
		Date( int = 1, int = 1, int = 1900 ) ;
		~Date( void ) ;
		void display( void ) const ;

	private:
		char *month ;
		int day ;
		int year ;

		static char *monthName[12] ;
} ;

char* Date::monthName[12] = { "January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December" } ;

Date::Date( int m, int d, int y )
{
	if ( m >=1 && m <=12 ) {
		month = new char[strlen( monthName[m - 1] ) + 1] ;
		strcpy( month, monthName[m - 1] ) ;
	}
	else
		month = NULL ;

	day = d ;
	year = y ;
}

Date::~Date( void )
{
	delete [] month ;
}

void Date::display( void ) const
{
	cout << month << ' ' << day << ", " << year << endl ;
}

int main()
{
	Date birthday( 6, 24, 1940 ) ;
	birthday.display() ;

	return 0 ;
}