07 觀察者模式

#07 觀察者模式

#define _CRT_SECURE_NO_WARNINGS
#include <iostream>
#include<list>
using namespace std;

//抽象的英雄 抽象的觀察者
class AbstractHero{
public:
	virtual void Update() = 0;
};

//具體英雄  具體觀察者
class HeroA :public AbstractHero{
public:
	HeroA(){
		cout << "英雄A正在撸BOSS ..." << endl;
	}
	virtual void Update(){
		cout << "英雄A停止撸,待機狀态..." << endl;
	}
};

class HeroB :public AbstractHero{
public:
	HeroB(){
		cout << "英雄B正在撸BOSS ..." << endl;
	}
	virtual void Update(){
		cout << "英雄B停止撸,待機狀态..." << endl;
	}
};

class HeroC :public AbstractHero{
public:
	HeroC(){
		cout << "英雄C正在撸BOSS ..." << endl;
	}
	virtual void Update(){
		cout << "英雄C停止撸,待機狀态..." << endl;
	}
};

class HeroD :public AbstractHero{
public:
	HeroD(){
		cout << "英雄D正在撸BOSS ..." << endl;
	}
	virtual void Update(){
		cout << "英雄D停止撸,待機狀态..." << endl;
	}
};

class HeroE :public AbstractHero{
public:
	HeroE(){
		cout << "英雄E正在撸BOSS ..." << endl;
	}
	virtual void Update(){
		cout << "英雄E停止撸,待機狀态..." << endl;
	}
};


//觀察目标抽象
class AbstractBoss{
public:
	//添加觀察者
	virtual void addHero(AbstractHero* hero) = 0;
	//删除觀察者
	virtual void deleteHero(AbstractHero* hero) = 0;
	//通知所有觀察者
	virtual void notify() = 0; 
};


//具體的觀察者 BOSSA
class BOSSA : public AbstractBoss{
public:
	virtual void addHero(AbstractHero* hero){
		pHeroList.push_back(hero);
	}
	//删除觀察者
	virtual void deleteHero(AbstractHero* hero){
		pHeroList.remove(hero);
	}
	//通知所有觀察者
	virtual void notify(){
		for (list<AbstractHero*>::iterator it = pHeroList.begin(); it != pHeroList.end();it ++){
			(*it)->Update();
		}
	}
public:
	list<AbstractHero*> pHeroList;
};

void test01(){
	
	//建立觀察者
	AbstractHero* heroA = new HeroA;
	AbstractHero* heroB = new HeroB;
	AbstractHero* heroC = new HeroC;
	AbstractHero* heroD = new HeroD;
	AbstractHero* heroE = new HeroE;

	//建立觀察目标
	AbstractBoss* bossA = new BOSSA;
	bossA->addHero(heroA);
	bossA->addHero(heroB);
	bossA->addHero(heroC);
	bossA->addHero(heroD);
	bossA->addHero(heroE);


	cout << "heroC陣亡..." << endl;
	bossA->deleteHero(heroC);

	cout << "Boss死了...通知其他英雄停止攻擊，搶裝備..." << endl;
	bossA->notify();

}

int main(void){
	test01();
	return 0;
}