time.cpp

是有关C++编程原理教程的例子程序,全,应该对大家有所帮助

// Fig. 9.9: Time.cpp
// Member-function definitions for class Time.
#include <iostream>
using std::cout;

#include <iomanip>
using std::setfill;
using std::setw;

#include "Time.h" // include definition of class Time from Time.h

// Time constructor initializes each data member to zero;
// ensures that Time objects start in a consistent state
Time::Time( int hr, int min, int sec ) 
{ 
   setTime( hr, min, sec ); // validate and set time
} // end Time constructor

// set new Time value using universal time; ensure that
// the data remains consistent by setting invalid values to zero
void Time::setTime( int h, int m, int s )
{
   setHour( h ); // set private field hour
   setMinute( m ); // set private field minute
   setSecond( s ); // set private field second
} // end function setTime

// set hour value
void Time::setHour( int h )
{
   hour = ( h >= 0 && h < 24 ) ? h : 0; // validate hour
} // end function setHour

// set minute value
void Time::setMinute( int m )
{
   minute = ( m >= 0 && m < 60 ) ? m : 0; // validate minute
} // end function setMinute

// set second value
void Time::setSecond( int s )
{
   second = ( s >= 0 && s < 60 ) ? s : 0; // validate second
} // end function setSecond

// return hour value
int Time::getHour()
{
   return hour;
} // end function getHour

// return minute value
int Time::getMinute()
{
   return minute;
} // end function getMinute

// return second value
int Time::getSecond()
{
   return second;
} // end function getSecond

// print Time in universal-time format (HH:MM:SS)
void Time::printUniversal()
{
   cout << setfill( '0' ) << setw( 2 ) << getHour() << ":"
      << setw( 2 ) << getMinute() << ":" << setw( 2 ) << getSecond();
} // end function printUniversal

// print Time in standard-time format (HH:MM:SS AM or PM)
void Time::printStandard()
{
   cout << ( ( getHour() == 0 || getHour() == 12 ) ? 12 : getHour() % 12 )
      << ":" << setfill( '0' ) << setw( 2 ) << getMinute()
      << ":" << setw( 2 ) << getSecond() << ( hour < 12 ? " AM" : " PM" );
} // end function printStandard

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