decorator模式

#include <iostream>
using namespace std;

class compoent
{
public:
    compoent(){}
    virtual ~compoent(){}

    virtual void Operation(){};
};

class concretecompoent:public compoent{
    virtual void Operation(){cout<<"I can only do AAAAAAAAAAAAAA!!!!\n";};

};

class decorator:public compoent{
public:
virtual void Operation(){};
};

class concretedecorator1:public decorator{
public:
    compoent* p_com;
    concretedecorator1(compoent* var){
        p_com=var;
    }
    virtual void Operation(){
        p_com->Operation();
        cout<<"I can also do BBBBBBBBBBBBBB!!!!\n";
    }
};

class concretedecorator2:public decorator{
public:
    compoent* p_com;
    concretedecorator2(compoent* var){
        p_com=var;
    }
    virtual void Operation(){
        p_com->Operation();
        cout<<"I can also do CCCCCCCCCCCCCCC!!!!\n";
    }
};
int main()
{
    compoent* orign=new concretecompoent();
    orign->Operation();
    concretedecorator1* decor1=new concretedecorator1(orign);
    concretedecorator2* decor2=new concretedecorator2(decor1);
    concretedecorator1* decor3=new concretedecorator1(decor2);
    decor3->Operation();
    return 0;
}