int main(int argc, char *argv[])
{
ConcreteSubject *sub = new ConcreteSubject();
Observer *o1 = new ConcreteObserverA(sub);
Observer *o2 = new ConcreteObserverB(sub);
sub->SetState("old");
sub->Notify();
sub->SetState("new"); // 也可以由Observer调用
sub->Notify();
return 0;
}
int main()
{
ConcreteSubject* sub = new ConcreteSubject();
Observer* o1 = new ConcreteObserverA(sub);
Observer* o2 = new ConcreteObserverB(sub);
sub->SetState("old");
sub->Notify();
sub->SetState("new");
sub->Notify();
system("pause");
return 0;
}
int main(int argc, char *argv[])
{
ConcreteSubject *sub = new ConcreteSubject();
Observer *obs1 = new ConcreteObserverA(sub);
Observer *obs2 = new ConcreteObserverB(sub);
sub->SetState("old");
sub->Notify();
sub->SetState("new");
sub->Notify();
delete obs2;
delete obs1;
delete sub;
return 0;
}
int main() {
ConcreteSubject * subject = new ConcreteSubject();
subject->Attach(new ConcreteObserver(subject, "zhaohua"));
subject->Attach(new ConcreteObserver(subject, "lichao"));
subject->SetState("Doc Yang comes here !!!");
subject->Notify();
return 0;
}