time6.cpp

经典vc教程的例子程序

// Fig. 7.8: time.cpp 
// Member function definitions for Time class.
#include "time6.h"
#include <iostream.h>

// Constructor function to initialize private data.
// Calls member function setTime to set variables.
// Default values are 0 (see class definition).
Time::Time( int hr, int min, int sec ) 
   { setTime( hr, min, sec ); }

// Set the values of hour, minute, and second.
Time &Time::setTime( int h, int m, int s )
{
   setHour( h );
   setMinute( m );
   setSecond( s ); 
   return *this;   // enables cascading
}

// Set the hour value
Time &Time::setHour( int h )
{
   hour = ( h >= 0 && h < 24 ) ? h : 0;

   return *this;   // enables cascading
}

// Set the minute value
Time &Time::setMinute( int m )
{
   minute = ( m >= 0 && m < 60 ) ? m : 0;

   return *this;   // enables cascading
}

// Set the second value
Time &Time::setSecond( int s )
{
   second = ( s >= 0 && s < 60 ) ? s : 0;

   return *this;   // enables cascading
}

// Get the hour value
int Time::getHour() const { return hour; }

// Get the minute value
int Time::getMinute() const { return minute; }

// Get the second value
int Time::getSecond() const { return second; }

// Display military format time: HH:MM:SS
void Time::printMilitary() const
{
   cout << ( hour < 10 ? "0" : "" ) << hour << ":"
        << ( minute < 10 ? "0" : "" ) << minute;
}

// Display standard format time: HH:MM:SS AM (or PM)
void Time::printStandard() const
{
   cout << ( ( hour == 0 || hour == 12 ) ? 12 : hour % 12 ) 
        << ":" << ( minute < 10 ? "0" : "" ) << minute 
        << ":" << ( second < 10 ? "0" : "" ) << second
        << ( hour < 12 ? " AM" : " PM" );
}