time.cpp

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// Tutorial 15: Time.cpp
// Member-function definitions for class Time.
#include <iostream> // required to perform C++ stream I/O
#include <iomanip>  // required for parameterized stream manipulators 

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

using namespace std; // for accessing C++ Standard Library members

// Time constructor initializes each data member and ensures
// that all Time objects start in a consistent state
Time::Time() 
{ 
   // initialize each value
   setHour( 12 );
   setMinute( 0 );
   setSecond( 0 ); 

} // end Time default constructor

// Time constructor initializes each data member to values 
// specified in the parameter list
Time::Time( int hourValue, int minuteValue, int secondValue ) 
{ 
   // initialize each value
   setHour( hourValue );
   setMinute( minuteValue );
   setSecond( secondValue ); 

} // end Time overloaded constructor

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

} // end function getHour

// sets new hour value, performs validity checks on the data value 
// and sets invalid values to 12.
void Time::setHour( int hourValue )
{
   // update hour value
   if ( hourValue > 0 && hourValue < 13 )
   {
      hour = hourValue; // use hourValue if it is in the valid range
   } // end if
   else // otherwise, set hour to 12
   {
      hour = 12;
   } // end else

} // end function setHour

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

} // end function getMinute

// sets new minute value, performs validity checks on the data value 
// and sets invalid values to 0.
void Time::setMinute( int minuteValue )
{
   // update minute value
   if ( minuteValue >= 0 && minuteValue < 60 )
   {
      minute = minuteValue; // use minuteValue if within valid range
   } // end if
   else // otherwise, set minute to 0
   {
      minute = 0;
   } // end else

} // end function setMinute

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

} // end function getSecond

// sets new second value, performs validity checks on the data value 
// and sets invalid values to 0.
void Time::setSecond( int secondValue )
{
   // update second value
   if ( secondValue >= 0 && secondValue < 60 )
   {
      second = secondValue; // use secondValue if within valid range
   } // end if
   else // otherwise, set second to 0
   {
      second = 0;
   } // end else

} // end function setSecond

// display Time
void Time::displayTime()
{
   cout << setfill( '0' ) << setw( 2 ) << getHour() << ":"
        << setw( 2 ) << getMinute() << ":"
        << setw( 2 ) << getSecond() << flush;

} // end function displayTime

// increments the current time by one second
void Time::tick()
{
   // increment time by one second
   setSecond( ( getSecond() + 1 ) % 60 );

   // update minutes if seconds was previously 59
   if ( getSecond() == 0 )
   {
      setMinute( ( getMinute() + 1 ) % 60 );

      // update hours if minutes previously was 59
      if ( getMinute() == 0 )
      {
         setHour( ( getHour() % 12 ) + 1 );
      } // end if

   } // end if

} // end function tick

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