装饰模式 Decorate

// Decorator.cpp : Defines the entry point for the console application.
//

#include "stdafx.h"
#include <iostream>
#include <STRING>
using namespace std;

class Cake{
public:
    Cake():name("cake"){}
    virtual ~Cake(){}
    virtual string getname(){
        return name;
    }
public:
    string name;
};

class MikeCake:public Cake{
public:
    MikeCake(){
        this->name = "Milkcake";
    }
    MikeCake(string str){
        this->name = str;
    }
};

class Decorate:public Cake{
public:
    Decorate(Cake * p):pcake(p){}
    virtual ~Decorate(){
    };
protected:
    Cake *pcake;
};

class FlowerDecorate:public Decorate{
public:
    FlowerDecorate(Cake * p):Decorate(p){
        name = (string("flowered --> ")+=p->getname());
    }

};

class FruitDecorate:public Decorate{
public:
    FruitDecorate(Cake * p):Decorate(p){
        name = (string("fruited --> ")+=p->getname());
    }


};

int main(int argc, char* argv[])
{
    Cake * pcake = new MikeCake("cake1");
    cout<<pcake->getname()<<endl;
    cout<<FlowerDecorate(pcake).getname()<<endl;
    cout<<FruitDecorate(&FlowerDecorate(pcake)).getname()<<endl;
    delete pcake;
    return 0;
}