// File: ex3-4.cpp - the clock class

#include <iostream>
using namespace std;

class Clock
{
  private:
    int hours;
    int minutes;
    int seconds;
  public:
    void set(int h, int m, int s)
      {hours = h; minutes = m; seconds = s; return;}		// inline
    void increment(void);
    void display(int=0) const;
};

void Clock::increment (void)
{
  seconds++;
  minutes += seconds/60;
  hours += minutes/60;
  seconds %= 60;
  minutes %= 60;
  hours %= 24;
  return;
}

void Clock::display(int format) const
{
  if (format) { 			// use format hh:mm:ss AM/PM
    cout << (hours % 12 ? hours % 12:12) << ':'
  		   << (minutes < 10 ? "0" :"") << minutes << ':'
  		   << (seconds < 10 ? "0" :"") << seconds
         << (hours < 12 ? " AM" : " PM") << endl;
  }
  else {           		// use format hh:mm:ss (24 hour time)
    cout << (hours < 10 ? "0" :"") << hours << ':'
  		 << (minutes < 10 ? "0" :"") << minutes << ':'
  		 << (seconds < 10 ? "0" :"") << seconds << endl;
  }
}

int main(void)
{
  Clock c;
  c.set(23,59,55);
  for (int i = 0; i < 10; i++)
  {
    c.increment();
    c.display();
    c.display(1);
    cout << endl;
  }
  return 0;
}