c++ 中介者模式-优快云博客

本文介绍了一种使用C++实现的中介者模式，通过一个QQ群聊天的例子展示了如何利用该模式来组织多个对象间的交互。主要实现了基本的Colleage类及派生的Monitor、Secretary、StudentA和StudentB等角色类，并通过Mediator类协调这些角色之间的通信。

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#include <iostream>

#include <vector>

#include <string>


using namespace std;


class Colleage

{

private:

   string name;

        string content;

public:

  Colleage(string n = " "):name(n){};

 void set_name(string name)

  {

           this->name = name;

   }

   string get_name()

   {

           return this->name;

   }

   void set_content(string content)

    {

           this->content = content;

     }

   string get_content()

        {

           if(content.size() != 0)

                     return content;

             else return "Copy that";

    }

   virtual void talk(){};


};


class Monitor : public Colleage

{

public:

     Monitor(string n = ""):Colleage(n){};

       virtual void talk()

 {

           cout<<"班长 "<<get_name()<<" 说："<<get_content()<<endl;

  }

};


class Secretary : public Colleage

{

public:

    Secretary(string n = ""):Colleage(n){};

     virtual void talk()

 {

           cout<<"团支书 "<<get_name()<<" 说："<<get_content()<<endl;

       }

};


class StudentA : public Colleage

{

public:

     StudentA(string n = ""):Colleage(n){};

      virtual void talk()

 {

           cout<<"学生 A "<<get_name()<<" 说："<<get_content()<<endl;

        }

};


class StudentB : public Colleage

{

public:

     StudentB(string n = ""):Colleage(n){};

      virtual void talk()

 {

           cout<<"学生 B "<<get_name()<<" 说："<<get_content()<<endl;

        }

};


class Mediator

{

public:

       vector<Colleage*> studentList;

        virtual void add_student(Colleage *student)

 {

           studentList.push_back(student);

     };

  virtual void notify(Colleage *student){};    

};


class QQMediator : public Mediator

{

public:

       virtual void notify(Colleage *student)

      {

           student->talk();

             for(int i = 0 ; i < studentList.size() ; ++i)

                {            

                       if(student != studentList[i])

                       {

                           studentList[i]->talk();

                      }

           }

   };      

};



int main()

{

   QQMediator qq;

      Monitor *studentMonitor = new Monitor("Foxx");

      Secretary *studentSecretary = new Secretary("TC");

  StudentA *studentA = new StudentA("Jack");

  StudentB *studentB = new StudentB("Frank");        


     qq.add_student(studentSecretary);

   qq.add_student(studentA);

   qq.add_student(studentB);     


  studentMonitor->set_content("明天开始放假！");

        qq.notify(studentMonitor); 


     system("pause");

    return 0;

}