cpp10.cpp

C++参考书

// Coded by plusir -- Dec.30.2002.
// Standard C++ Bible -- (P295-11-10)

#include <iostream>
using namespace std ;

class Date
{
	public:
		Date( int m, int d, int y )
		{
			mo = m ;
			da = d ;
			yr = y ;
		}

		operator long( void )
		{
			static int dys[] = { 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 } ;

			long days = yr ;
			days *= 365 ;
			days += yr / 4 ;
			for ( int i = 0; i < mo - 1; ++i )
				days += dys[i] ;
			days += da ;

			return days ;
		}

	private:
		int mo ;
		int da ;
		int yr ;
} ;

int main()
{
	Date today( 2, 12, 90 ) ;
	const long ott = 123 ;

	long sum = ott + today ;

	cout << ott << " + " << today << " = " << sum << endl ;

	return 0 ;
}