C++观察模式 学习案例

一个类变化 其他类也跟着变化 将制动通知其他对象 并作出反应

#define _CRT_SECURE_NO_WARINGS
#include <iostream>
#include <list>
using namespace std;
class AbstracHero {
public:
	virtual void Update() = 0;


};
class HeroA :public AbstracHero
{
public:
	HeroA()
	{
		cout << "英雄A正在攻击BOSS" << endl;

	}
	virtual void Update()
	{
		cout << "英雄A停止攻击BOSS"<<endl;

	}


};
class HeroB :public AbstracHero
{
public:
	HeroB()
	{
		cout << "英雄B正在攻击BOSS" << endl;

	}
	virtual void Update()
	{
		cout << "英雄B停止攻击BOSS" << endl;
	}
};
class AbstracBoss
{

public:
	virtual void addHero(AbstracHero *hero) = 0;
	virtual void deleteHero(AbstracHero *hero) = 0;
	virtual void notify() = 0;
};
class BossA:public AbstracBoss
{

public:
	virtual void addHero(AbstracHero *hero)
	{
		pHeroList.push_back(hero);
	}
	virtual void deleteHero(AbstracHero *hero)
	{
		pHeroList.remove(hero);
	}

	virtual void notify()
	{
		for (list<AbstracHero*>::iterator it = pHeroList.begin(); it != pHeroList.end(); it++)
		{
			(*it)->Update();
		}	
	}
public :
	list<AbstracHero *>pHeroList;
};
void test01()
{
	AbstracHero *heroA = new HeroA;
	AbstracHero *heroB = new HeroB;

	//创建目标
	AbstracBoss *Boss = new BossA;
	Boss->addHero(heroA);
	Boss->addHero(heroB);
	Boss->deleteHero(heroA);
	Boss->notify();
}
int main()
{

	test01();
	getchar();
	return 0;
}