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DesignPattern/ObserverPattern/ObserverMain.cpp
34 строки
769 B
huihut
Design mode code comments are changed to English
16 дек 2020, 11:07
16 дек 2020, 11:07
3a9e212
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// // Created by xiemenghui on 2018/7/21. // #include "ObserverMain.h" void ObserverMain() { // Create Subject ConcreteSubject * pSubject = new ConcreteSubject(); // Create Observer IObserver * pObserver1 = new ConcreteObserver("Jack Ma"); IObserver * pObserver2 = new ConcreteObserver("Pony"); // Attach Observers pSubject->Attach(pObserver1); pSubject->Attach(pObserver2); // Change the price and notify the observer pSubject->SetPrice(12.5); pSubject->Notify(); // Detach Observers pSubject->Detach(pObserver2); // Change the state again and notify the observer pSubject->SetPrice(15.0); pSubject->Notify(); SAFE_DELETE(pObserver1); SAFE_DELETE(pObserver2); SAFE_DELETE(pSubject); }