public GMTConsoleClock(ClockSubject clockSubject)
{
// register with the clock subject for updates
this.clockSubject = clockSubject;
clockSubject.Attach(this);
}
public SecondsCountingConsoleClock(ClockSubject clockSubject)
{
// register with the clock subject for updates
this.clockSubject = clockSubject;
clockSubject.Attach(this);
}