C++ デザイン パターンのデコレーション モードの簡単な紹介

[code]int main(){
    //初始化person(人)组件类Component,如果只有一个ConereteComponent类而不需要抽象的Component类，那么可以直接让Decorator继承具体的Component类。
    concretePerson *cp = new concretePerson("Jarrett");

    //初始化具体服饰类(装饰类Decorate)
    concreteTshirts *Tshirts = new concreteTshirts;
    concreteTrouser *Trouser = new concreteTrouser;
    concreteShoes *Shoe = new concreteShoes;
    //concreteSuit *Suit = new concreteSuit;
    concreteHat *Hat = new concreteHat;

    //依次进行装饰
    Tshirts->decorate(cp);
    Trouser->decorate(Tshirts);
    Shoe->decorate(Trouser);
    //Suit->decorate(Shoe);
    //显示结果
    Shoe->show();
    std::cout << std::endl;
    //再装饰一次查看效果
    Hat->decorate(Shoe);
    Hat->show();

    return 0;
}

[code]//主类
class concretePerson{
private:
    std::string name;//人名
public:
    concretePerson(){}
    concretePerson(std::string n):name(n){} //构造方式
    virtual void show()const{
        std::cout << name << "&#39;s dress: ";
    }
};

//服饰类（装饰类主类）
class Finery: public concretePerson{
protected:
    concretePerson *cPerson;//重点是维护一个主体类对象
public:
    void decorate(concretePerson *cp){
        cPerson = cp;
    }
    void show()const{
        if(cPerson != NULL)
            cPerson->show();
    }
};

//具体服饰类Tshirts
class concreteTshirts: public Finery{
public:
  void show()const{
      Finery::show(); //调用基类方法
      std::cout << "Tshirts ";  //用此来修饰
  }
};

//具体服饰类Tshirts
class concreteTrouser: public Finery{
public:
  void show()const{
      Finery::show(); //调用基类方法
      std::cout << "Trouser ";  //用此来修饰
  }
};

//具体服饰类Tshirts
class concreteShoes: public Finery{
public:
  void show()const{
      Finery::show(); //调用基类方法
      std::cout << "Shoe ";  //用此来修饰
  }
};

//具体服饰类Tshirts
class concreteSuit: public Finery{
public:
  void show()const{
      Finery::show(); //调用基类方法
      std::cout << "Suit ";  //用此来修饰
  }
};

//具体服饰类Tshirts
class concreteHat: public Finery{
public:
  void show()const{
      Finery::show(); //调用基类方法
      std::cout << "Hat ";  //用此来修饰
  }
};