【1】什么是装饰模式？

装饰模式：动态地给一个对象添加一些额外的职责。

【2】装饰模式代码示例：

代码如下：

1 #include 
      
        2 #include 
       
         3 using namespace std; 4  5 class Person 6 { 7 private: 8     string m_strName; 9 public:10     Person(string strName)11     {12         m_strName = strName;13     }14 15     Person(){}16 17     virtual void show()18     {19         cout << "装扮的是:" << m_strName << endl;20     }21 };    22 23 class Finery : public Person24 {25 protected:26     Person *m_component;27 public:28     void decorate(Person* component)29     {30         m_component = component;31     }32     virtual void show()33     {34         m_component->show();35     }36 };37 38 class TShirts : public Finery39 {40 public:41     virtual void show()42     {43         m_component->show();44         cout << "T shirts" << endl;45     }46 };47 48 class BigTrouser : public Finery49 {50 public:51     virtual void show()52     {53         m_component->show();54         cout << "Big Trouser" << endl;55     }56 };57 58 int main()59 {60     Person *p = new Person("小李");61     BigTrouser *bt = new BigTrouser();62     TShirts *ts = new TShirts();63         64     bt->decorate(p);65     ts->decorate(bt);66     ts->show();67 68     return 0;69 }
       
      

 

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