裝飾模式和適配器模式

1、裝飾模式

  動態的給一個對象添加一些額外的職責;

  側重于功能的擴展：對其功能可以自由的增加或者減少;

2、具體實現

  (1)、代碼實現

#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<<"可以飛"<<endl;
        }
    private:
        Car *m_car;

};

//功能可以自由自在的組合,功能很強大!!!      
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、適配器模式

  適配器是將2個不同的對象進行連接和組合！

  將一個類的接口轉換成客戶希望的另外一個接口,

4、具體實現

  (1)、代碼如下

#include<iostream>
using namespace std;

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

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

    private:
};

class Adapter : public Current18 { //適配器,要滿足客戶的需求;
    public:
        Adapter(Current220 *current){
            m_current = current;
        }   
        virtual void useCurrent18(){
            cout<<"適配器 適配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)、運行結果