1、装饰模式

  动态的给一个对象添加一些额外的职责;

  侧重于功能的扩展:对其功能可以自由的增加或者减少;


2、具体实现

  (1)、代码实现

#include<iostream>
using namespace std;

class Car{
    public:
        virtual void show() = 0;
    private:

};

class RunCar : public Car{
    public:
        virtual void show(){
            cout<<"可以跑"<<endl;
        }   
    private:
};

class SwimCarDriver : public Car{
    public:
        SwimCarDriver(Car *car){
            m_car = car;
        }   
        virtual void show(){
            m_car->show();
            cout<<"可以游泳"<<endl;
        }
    private:
        Car *m_car;

};

class FlyCarDriver : public Car{
    public:
        FlyCarDriver(Car *car){{
            m_car = car;
        }
        virtual void show(){
            m_car->show();
            cout<<"可以飞"<<endl;
        }
    private:
        Car *m_car;

};

//功能可以自由自在的组合,功能很强大!!!      
int main(void){
    Car *mycar = NULL;
    mycar = new RunCar;

    mycar->show();

    cout<<"--------------------------------"<<endl;
    FlyCarDriver *flycar = new FlyCarDriver(mycar);
    flycar->show();
    cout<<"--------------------------------"<<endl;
    SwimCarDriver *swimcar = new SwimCarDriver(flycar);
    swimcar->show();

    return 0;
}


3、适配器模式

  适配器是将2个不同的对象进行连接和组合!

  将一个类的接口转换成客户希望的另外一个接口,


4、具体实现

  (1)、代码如下

#include<iostream>
using namespace std;

class Current18{
    public:
        virtual void useCurrent18() = 0;
    private:
};

class Current220{
    public:
        void useCurrent220(){
            cout<<"我是220V,欢迎使用"<<endl;
        }   

    private:
};

class Adapter : public Current18 { //适配器,要满足客户的需求;
    public:
        Adapter(Current220 *current){
            m_current = current;
        }   
        virtual void useCurrent18(){
            cout<<"适配器 适配220V"<<endl;
            m_current->useCurrent220();
        }
    private:
        Current220 *m_current;
};

int main(void){
    Current220 *current220 = new Current220;

    Adapter *adapter = new Adapter(current220);

    adapter->useCurrent18();
    delete current220;

    return 0;
}

  (2)、运行结果

wKiom1hfK2ry26wbAABLeLTEz2s248.png-wh_50