设计模式---观察者模式（C++实现）

不念不忘少年蓝@ 2022-07-14 02:55 140阅读 0赞

![20161108234520954][]  
\#include "stdafx.h"  
\#include <iostream>  
\#include <list>  
\#include <numeric>  
\#include <algorithm>  
using namespace std;  
//  
//  
// Generated by StarUML(tm) C++ Add-In  
//  
// @ Project : Untitled  
// @ File Name : INotifier.h  
// @ Date : 2016-11-8  
// @ Author : richard.liu  
//  
//  
  
class TecherListenner \{   
public:  
 virtual void onTecherComming() = 0;  
\};  
  
class INotifier \{   
public:  
 virtual void addListenner(TecherListenner\* listenner) = 0;  
 virtual void removeListenner(TecherListenner\* removeListenner) = 0;  
 virtual void notify() = 0;  
\};  
  
class TecherNotifier : public INotifier \{   
public:  
 list<TecherListenner\*> m\_listenners;  
 void addListenner(TecherListenner\* listenner);  
 void removeListenner(TecherListenner\* listenner);  
 void notify();  
\};  
  
void TecherNotifier::addListenner(TecherListenner\* listenner) \{   
 m\_listenners.push\_back(listenner);   
\}  
  
void TecherNotifier::removeListenner(TecherListenner\* listenner) \{   
 m\_listenners.push\_back(listenner);   
\}  
  
void TecherNotifier::notify() \{   
 list <TecherListenner\*> ::iterator it = m\_listenners.begin();   
 for (; it != m\_listenners.end(); ++ it)   
 \{   
 (\*it)->onTecherComming();  
 \}   
\}  
  
  
class XiaoZhang : public TecherListenner \{   
public:  
 void onTecherComming();  
 void stopCopyWork();  
 void copyHomeWork();  
\};  
  
void XiaoZhang::onTecherComming() \{   
 stopCopyWork();  
\}  
  
void XiaoZhang::stopCopyWork() \{   
 cout << "stop copy homework" << endl;  
\}  
  
void XiaoZhang::copyHomeWork() \{   
 cout << "copy homework now" << endl;  
\}  
  
int main(int argc, char\* argv\[\])  
\{   
 TecherNotifier monitor;   
 XiaoZhang xz;   
 monitor.addListenner(&xz);   
 xz.copyHomeWork();   
 monitor.notify();   
 printf("Hello World!\\n");  
 return 0;

转自 http://blog.csdn.net/lbaihao/article/details/53091097

[20161108234520954]: /images/20220714/d5b326e1f78b48b5bbf9bd5c8e27de76.png