设计模式---观察者模式（C++实现）_staruml(tm) c++ add-in-优快云博客

本文介绍了一个简单的观察者模式实现案例，通过定义教师监听者接口和通知者接口，并使用列表存储监听者，当触发通知时遍历列表调用监听者的回调方法。

摘要生成于 C知道，由 DeepSeek-R1 满血版支持，前往体验 >

#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.youkuaiyun.com/lbaihao/article/details/53091097