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#ifndef DIGITALCLOCK_H
#define DIGITALCLOCK_H
//=========================================================
// ConcreteObserver class
//
// DigitalClock
//
// It is a ConcreteObserver class and is a child class of
// the Observer class.
//
// It is a digital clock observer. It attaches to a timer
// object of the type Subject at run time. The timer
// object calls DigitalClock member function Update()
// whenever there is a DigitalClock update required.
// DigitalClock obtain current time from the timer object
// by timer object's member functions GetHour(),
// GetMinutes, and GetSecond(). DigitalClock prints out
// the updated time.
//
//=========================================================
class ClockTimer;
class DigitalClock {
public:
void Draw(const ClockTimer &); // print updated time
};
#endif
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