c++ 责任链模式

#include <iostream>  

#include <string>  

using namespace std;  


// 请求  

class Request  

{  

public:  

 int m_nNumber;  

};  


// 管理者  

class Manager  

{  

public:  

       Manager(string temp) { name = temp; }  

     void SetSuccessor(Manager* temp) { manager = temp; }  

      virtual void GetRequest(Request* request) = 0;  

protected:  

    Manager* manager;  

 string name;  

};  


// 经理  

class CommonManager : public Manager  

{  

public:  

     CommonManager(string strTemp) : Manager(strTemp) {}  

       virtual void GetRequest(Request* request);  

};  


void CommonManager::GetRequest(Request* request)  

{  

       if (request->m_nNumber>=0 && request->m_nNumber<1000)  

 {  

         cout << name << " 处理了请求: " << request->m_nNumber << endl;  

        }  

 else  

      {  

         manager->GetRequest(request);  

      }  

}  


// 总监  

class Majordomo : public Manager  

{  

public:  

     Majordomo(string strTemp) : Manager(strTemp) {}  

   virtual void GetRequest(Request* request);  

};  


void Majordomo::GetRequest(Request* request)  

{  

   if (request->m_nNumber <= 5000)  

     {  

         cout << name << " 处理了请求: " << request->m_nNumber << endl;  

        }else  

     {  

         manager->GetRequest(request);  

      }  

}  


//总经理    

class GeneralManager: public Manager    

{    

public:    

       GeneralManager(string name):Manager(name) {}    

    virtual void GetRequest(Request* request)  //总经理可以处理所有请求    

  {         

          cout << name << " 处理了请求: " << request->m_nNumber << endl;          

        }    

};  


int main(){  


      Manager* common = new CommonManager(" 经理");  

 Manager* major = new Majordomo("李总监");  

      GeneralManager* general  = new GeneralManager("赵总");  

  common->SetSuccessor(major);  

       major->SetSuccessor(general);  

      Request* rq = new Request();  


  rq->m_nNumber = 999;  

       common->GetRequest(rq);  


        rq->m_nNumber = 4999;  

      common->GetRequest(rq);  


        rq->m_nNumber = 6999;  

      common->GetRequest(rq);  


        delete rq;  

        delete major;  

     delete common;  

    delete general;  


       system("pause");

    return 0;  

}  

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