subject.hpp

来自「深入浅出设计模式（书配套c++源代码)。包含20个设计模式的c++实现。」· HPP 代码 · 共 21 行

#ifndef	_HFDP_CPP_OBSERVER_SUBJECT_HPP_
#define _HFDP_CPP_OBSERVER_SUBJECT_HPP_

#include "WeatherStation.hpp"

namespace HeadFirstDesignPatterns {
namespace Observer {

class Subject {

	protected: virtual ~Subject() = 0 {
	};
	public: virtual void registerObserver( Observer* o ) = 0;
	public: virtual void removeObserver( Observer* o ) = 0;
	public: virtual void notifyObservers() const = 0;
};

} // namespace Observer
} // namespace HeadFirstDesignPatterns

#endif