十五、装饰模式

装饰模式：动态的给一个对象添加一些额外职责

#include<iostream>
#include<string>
using namespace std;
//抽象接口 手机
class Phone
{
public:
	Phone(){}
	virtual void ShowDecorate(){}
};
//具体类 苹果
class Iphone:public Phone
{
	string m_name;
public:
	Iphone(string name):m_name(name){}
	virtual void ShowDecorate()
	{
		cout<<m_name<<"的装饰"<<endl;
	}
};
//抽象接口 装饰类
//装饰类
class DecoratorPhone : public Phone
{
private:
	Phone *m_phone;  //要装饰的手机
public:
	DecoratorPhone(Phone *phone): m_phone(phone) {}
	virtual void ShowDecorate() { m_phone->ShowDecorate(); }
};
//具体的装饰类
class DecoratorPhoneA : public DecoratorPhone
{
public:
	DecoratorPhoneA(Phone *phone) : DecoratorPhone(phone) {}
	void ShowDecorate() 
	{ 
		DecoratorPhone::ShowDecorate(); 
		AddDecorate();
	}
private:
	void AddDecorate()
	{
		cout<<"增加挂件"<<endl;
	} //增加的装饰
};
//具体的装饰类
class DecoratorPhoneB : public DecoratorPhone
{
public:
	DecoratorPhoneB(Phone *phone) : DecoratorPhone(phone) {}
	void ShowDecorate()
	{ 
		DecoratorPhone::ShowDecorate(); 
		AddDecorate();
	}
private:
	void AddDecorate()
	{ 
		cout<<"屏幕贴膜"<<endl;
	} //增加的装饰
};

int main()
{
	Phone *iphone = new Iphone("6300");
	Phone *dpa = new DecoratorPhoneA(iphone); //装饰，增加挂件
	Phone *dpb = new DecoratorPhoneB(dpa);    //装饰，屏幕贴膜
	dpb->ShowDecorate();
	return 0;
}