c++之桥接模式

桥接模式

定义：把抽象部分和它的实现部分分离，使得它们都可以独立的变化

栗子场景：华山派和崆峒派先后获得了武林秘籍辟邪剑谱和九阴真经，于是开始苦练此功..

UML类图

代码：

#include<iostream>

using namespace std;
class Sects;

//功夫
class Kungfu
{
public:
	virtual void practice() = 0;
};

//九阴真经
class JiuyinZj :public Kungfu
{
public:
	virtual void practice()
	{
		cout << "@九阴真经。注：玄门内功，至阴至柔" << endl;
	}
};

//辟邪剑谱
class PixieJp :public Kungfu
{
public:
	virtual void practice()
	{
		cout << "@辟邪剑谱，注：欲练此功，必先自宫" << endl;
	}
};


//门派 
class Sects{
public:
	Sects() :m_kungfu(nullptr){}

	void setMartialarts(Kungfu* m)
	{
		this->m_kungfu = m;
	}
	Kungfu* getKungfu()
	{
		return m_kungfu;
	}
	virtual void practice() = 0;
private:
	Kungfu *m_kungfu;	//桥接
};

//华山
class HuaShan :public Sects
{
public:
	void practice()
	{	
		getKungfu()->practice();
	}
};

//崆峒
class KongTong :public Sects
{
public:
	void practice()
	{
		getKungfu()->practice();
	}
};

//客户端
int main()
{
	Sects *sects = new HuaShan;
	cout << "华山派弟子正在练习：" << endl;
	sects->setMartialarts(new JiuyinZj);
	sects->practice();

	sects->setMartialarts(new PixieJp);
	sects->practice();

	sects = new KongTong;
	cout << "崆峒派弟子正在练习：" << endl;
	sects->setMartialarts(new JiuyinZj);
	sects->practice();

	sects->setMartialarts(new PixieJp);
	sects->practice();
	if (sects)
	{
		delete sects;
		sects = nullptr;
	}

	return 0;
}

效果：