[2:28pm]  <mccoy@brahms> m time3.h
// TIME3.H 
// Declaration of the Time class.
// Member functions defined in TIME3.CPP

// prevent multiple inclusions of header file
#ifndef TIME3_H  
#define TIME3_H 

class Time {
public:
   Time(int = 0, int = 0, int = 0);  // constructor

   // set functions
   void setTime(int, int, int);  // set hour, minute, second
   void setHour(int);     // set hour
   void setMinute(int);   // set minute
   void setSecond(int);   // set second

   // get functions
   int getHour();         // return hour
   int getMinute();       // return minute
   int getSecond();       // return second

   void printMilitary();  // output military time
   void printStandard();  // output standard time

private:
   int hour;              // 0 - 23
   int minute;            // 0 - 59
   int second;            // 0 - 59
};

#endif

---------------------------------------------------------

[2:40pm]  <mccoy@brahms> cat time3.cpp 
// TIME3.CPP 
// Member function definitions for Time class.
#include "time3.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.
void Time::setTime(int h, int m, int s)
{
   hour = (h >= 0 && h < 24) ? h : 0;
   minute = (m >= 0 && m < 60) ? m : 0;
   second = (s >= 0 && s < 60) ? s : 0;
}

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

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

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

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

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

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

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

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

---------------------------------------------------------

[2:42pm]  <mccoy@brahms> cat fig6_10.cpp 
// FIG6_10.CPP 
// Demonstrating the Time class set and get functions
#include <iostream.h>
#include "time3.h"

main()
{
   Time t;
   void incrementMinutes(Time &, const int);

   t.setHour(17);
   t.setMinute(34);
   t.setSecond(25);

   cout << "Result of setting all valid values:" << endl 
        << "  Hour: " << t.getHour()
        << "  Minute: " << t.getMinute()
        << "  Second: " << t.getSecond() << endl << endl;

   t.setHour(234);      // invalid hour set to 0
   t.setMinute(43);
   t.setSecond(6373);   // invalid second set to 0

   cout << "Result of attempting to set invalid hour and"
        << " second:" << endl << "  Hour: " << t.getHour()
        << "  Minute: " << t.getMinute()
        << "  Second: " << t.getSecond() << endl << endl;

   t.setTime(11, 58, 0);
   incrementMinutes(t, 3);

   return 0;
}

void incrementMinutes(Time &tt, const int count)
{
   cout << "Incrementing minute " << count
        << " times:" << endl << "Start time: ";
   tt.printStandard();

   for (int i = 1; i <= count; i++) {
      tt.setMinute((tt.getMinute() + 1) % 60);

      if (tt.getMinute() == 0)
         tt.setHour((tt.getHour() + 1) % 24);

      cout << endl << "minute + 1: ";
      tt.printStandard();
   }

   cout << endl;
}

---------------------------------------------------------

[2:43pm]  <mccoy@brahms> CC fig6_10.cpp time3.cpp 
fig6_10.cpp:
time3.cpp:
[2:43pm]  <mccoy@brahms> a.out
Result of setting all valid values:
  Hour: 17  Minute: 34  Second: 25

Result of attempting to set invalid hour and second:
  Hour: 0  Minute: 43  Second: 0

Incrementing minute 3 times:
Start time: 11:58:00 AM
minute + 1: 11:59:00 AM
minute + 1: 12:00:00 PM
minute + 1: 12:01:00 PM