cpp04.cpp

C++参考书

// Coded by plusir -- Dec.29.2002.
// Standard C++ Bible -- (P253-9-4)

#include <iostream>
#include <iomanip>
#include <ctime>
using namespace std ;

// ------------------------------------ struct Date ;
struct Date
{
	int month ;
	int day ;
	int year ;
	void display( void ) ;
} ;

void Date::display( void )
{
	static char *mon[] = {
		"January",
		"February",
		"March",
		"April",
		"May",
		"June",
		"July",
		"August",
		"September",
		"October",
		"November",
		"December"
	} ;

	cout << mon[month - 1] << ' ' << day << ", " << year ;
}

// -------------------------------------- struct Time
struct Time
{
	int hour ;
	int minute ;
	int second ;
	void display( void ) ;
} ;

void Time::display( void )
{
	cout.fill( '0' ) ;
	cout
		<< ( hour > 12 ? hour - 12 : ( hour == 0 ? 12 : hour ) ) << ':'
		<< setw( 2 ) << minute << ':'
		<< setw( 2 ) << second
		<< ( hour < 12 ? "am" : "pm" ) ;
	cout.fill( ' ' ) ;
}

// ---------------------------------------- main function
int main()
{
	time_t curtime = time( NULL ) ;
	tm tim = *localtime( &curtime ) ;

	Time now ;
	Date today ;

	now.hour = tim.tm_hour ;
	now.minute = tim.tm_min ;
	now.second = tim.tm_sec ;

	today.month = tim.tm_mon ;
	today.day = tim.tm_mday ;
	today.year = tim.tm_year + 1900 ;

	cout << "At the tone it will be " ;
	now.display() ;
	cout << " on " ;
	today.display() ;
	cout << '\a' << endl ;

	return 0 ;
}