using System;
/// <remarks> ThreeClocks shows how to construct 3 clocks
///   synchronized to count seconds, minutes, and hours. </remarks>

public class ThreeClocks
{ 
  Clock hours;
  Clock minutes; 
  Clock seconds; 

  public ThreeClocks()
  { hours = new Clock(0);
    minutes = new Clock(0);
    seconds = new Clock(0);
  }

  public void tick()
  { seconds.tick();
    if ( seconds.getTime() == 60 )  // one full minute?
          { minutes.tick();
            seconds.reset(0);
          }
    if ( minutes.getTime() == 60 )  // one full hour?
          { hours.tick();
            minutes.reset(0);
          }
   }

   public string getTime()
   { return
        hours.getTime().ToString("00") + ":" 
           + minutes.getTime().ToString("00") + ":"
               + seconds.getTime().ToString("00");
   }
}