#pragma once#ifndef CHAINOFRESPONSIBILITY_H #define CHAINOFRESPONSIBILITY_H #include <stdio.h> // 抽象基類,定義一個處理請求的接口 class Handler { public: Handler(Handler *pSuccessor = NULL); virtual ~Handler(); // 純虛函數,由派生類實現 virtual void HandleRequest() = 0; protected: Handler* m_pNextHandler; //if pNextHandler is null,handler it itself }; class ConcreateHandler1 : public Handler { public: ConcreateHandler1(Handler *pNextHandler = NULL) : Handler(pNextHandler){} virtual ~ConcreateHandler1(){} virtual void HandleRequest(); }; class ConcreateHandler2 : public Handler { public: ConcreateHandler2(Handler *pNextHandler = NULL) : Handler(pNextHandler){} virtual ~ConcreateHandler2(){} virtual void HandleRequest(); }; #endif
#include "StdAfx.h" #include "chainofresponsibility_impl.h"#include <iostream> Handler::Handler(Handler *pNextHandler /* = NULL*/) : m_pNextHandler(pNextHandler) { } Handler::~Handler() { delete m_pNextHandler; m_pNextHandler = NULL; } void ConcreateHandler1::HandleRequest() { if (m_pNextHandler) { std::cout <<"HandleRequest not by ConcreateHandler1,Transfer Next\n";m_pNextHandler->HandleRequest(); } else { std::cout << "HandleRequest by ConcreateHandler1\n"; } }void ConcreateHandler2::HandleRequest() { if (m_pNextHandler) { std::cout <<"HandleRequest not by ConcreateHandler2,Transfer Next\n";m_pNextHandler->HandleRequest(); } else { std::cout << "HandleRequest by ConcreateHandler2\n"; } }
// ChainOfResponsibility.cpp : 定義控制臺應用程序的入口點。 //#include "stdafx.h"#include "chainofresponsibility_impl.h" #include <stdlib.h> //使多個對象都有機會處理請求,從而避免請求的發送者和接收者之間的耦合關系. //將這些對象連成一條鏈，并沿著這條鏈傳遞該請求,直到有一個對象處理它為止. int _tmain(int argc, _TCHAR* argv[]) {// p2::handlerequest-->p1::handlerequestHandler *p1 = new ConcreateHandler1(/*pNextHandler*/); Handler *p2 = new ConcreateHandler2(p1); p2->HandleRequest(); delete p2; system("pause");return 0; }

總結

以上是生活随笔為你收集整理的设计模式-行为-职责链的全部內容，希望文章能夠幫你解決所遇到的問題。

如果覺得生活随笔網站內容還不錯，歡迎將生活随笔推薦給好友。