代理模式 C++ 實現

[cpp]
#include<iostream>  
#include<string>  
#include<cstdlib>  
 
using namespace std; 
/*
代理模式 ：追女生問題（大話設計模式中的案例） 
*/ 
 
/*共同的接口*/ 
  
class givegift 
{ public: 
  virtual void givedolls() = 0; 
  virtual void giveflowers() = 0; 
  virtual void givechocolate() = 0;     
}; 
 
class schoolgirl  
{ 
  private: 
        string name; 
  public: 
        void set_name(string name) 
        { 
          this->name = name; 
        } 
         
       string get_name() 
        { 
          return name;     
        } 
}; 
 // 追求者   
class pursuit: public givegift 
{ 
  schoolgirl mm; 
  public: 
        pursuit(schoolgirl mm) 
        { 
          this->mm = mm; 
        }     
         
        void givedolls() 
        { 
          cout <<mm.get_name()<<"送你洋娃娃"<< endl;     
        } 
         
        void giveflowers() 
        { 
          cout <<mm.get_name()<<"送你花兒"<< endl;     
        } 
         
        void givechocolate() 
        { 
          cout <<mm.get_name()<<"送你巧克力"<< endl;     
        } 
}; 
//代理   
class proxy: givegift 
{ 
  pursuit *gg; 
  public: 
    proxy(schoolgirl *mm) 
    { 
      gg = new pursuit(*mm);          
    }     
     
    void givedolls() 
    { 
      gg->givedolls();     
    } 
     
    void giveflowers() 
    { 
      gg->giveflowers();     
    } 
     
    void givechocolate() 
    { 
      gg->givechocolate();     
    } 
}; 
//相當於客戶端   
int main() 
{ 
  schoolgirl *jiaojiao = new schoolgirl(); 
  jiaojiao->set_name("李嬌嬌:"); 
   
  proxy *daili = new proxy(jiaojiao); 
   
  daili->givedolls(); 
  daili->giveflowers(); 
  daili->givechocolate(); 
  system("pause"); 
    return 0; 
} 

#include<iostream>
#include<string>
#include<cstdlib>

using namespace std;
/*
代理模式 ：追女生問題（大話設計模式中的案例）
*/

/*共同的接口*/
 
class givegift
{ public:
  virtual void givedolls() = 0;
  virtual void giveflowers() = 0;
  virtual void givechocolate() = 0;   
};

class schoolgirl
{
  private:
        string name;
  public:
        void set_name(string name)
        {
          this->name = name;
        }
       
       string get_name()
        {
          return name;   
        }
};
 // 追求者
class pursuit: public givegift
{
  schoolgirl mm;
  public:
        pursuit(schoolgirl mm)
        {
          this->mm = mm;
        }   
       
        void givedolls()
        {
          cout <<mm.get_name()<<"送你洋娃娃"<< endl;   
        }
       
        void giveflowers()
        {
          cout <<mm.get_name()<<"送你花兒"<< endl;   
        }
       
        void givechocolate()
        {
          cout <<mm.get_name()<<"送你巧克力"<< endl;   
        }
};
//代理
class proxy: givegift
{
  pursuit *gg;
  public:
    proxy(schoolgirl *mm)
    {
      gg = new pursuit(*mm);        
    }   
   
    void givedolls()
    {
      gg->givedolls();   
    }
   
    void giveflowers()
    {
      gg->giveflowers();   
    }
   
    void givechocolate()
    {
      gg->givechocolate();   
    }
};
//相當於客戶端
int main()
{
  schoolgirl *jiaojiao = new schoolgirl();
  jiaojiao->set_name("李嬌嬌:");
 
  proxy *daili = new proxy(jiaojiao);
 
  daili->givedolls();
  daili->giveflowers();
  daili->givechocolate();
  system("pause");
    return 0;
}

總結：

這個模式就是用代理者將對代理者進行包裝，並且繼承共同的接口；其中GoF 對其定義是：

為其它對象提供一種代理以控制對這個對象的訪問。