函数指针用来处理消息分发

//在通信中可能经常会用到消息ID，处理不同的消息ID找去找对应的处理函数，我写了一个小例子，处理消息分发。

 

直接上代码啦

 

//头文件h

#include "stdafx.h"#include "iostream"using namespace std;#define MSG_FUN void (MsgDis::*test)(int)#define MSG_RUN (this->*test)#define FUN_NAME_ &MsgDis::class MsgDis{public:void MsgDisp(int para);void MsgDisp_2(int para);void MsgDisp_3(int para);void runMsgFunction(int msgCode){switch(msgCode){case 1:{//不加这个括号就会出错MSG_FUN = &MsgDis::MsgDisp;MSG_RUN(10);break;}//不加这个括号就会出错case 2:{MSG_FUN = &MsgDis::MsgDisp_2;MSG_RUN(20);break;}case 3:{MSG_FUN = &MsgDis::MsgDisp_3;MSG_RUN(30);break;}default:{cout<<"No function for you"<<endl;break;}}}};

 

//实现文件cpp

#include "stdafx.h"#include "MsgDispatch.h"#include "iostream"using namespace std;void MsgDis::MsgDisp(int para){cout<<"hi boy ..this is MsgDisp, param is :/t"<<para<<endl;}void MsgDis::MsgDisp_2(int para){cout<<"hi boy ..this is MsgDisp___2, param is :/t"<<para<<endl;}void MsgDis::MsgDisp_3(int para){cout<<"hi boy ..this is MsgDisp___3, param is :/t"<<para<<endl;}

 

//测试文件

// CPlusPlus.cpp : 定义控制台应用程序的入口点。//#pragma once#include "stdafx.h"#include "iostream"#include <assert.h>#include "MsgDispatch.h"using namespace std;int _tmain(int argc, _TCHAR* argv[]){MsgDis *msgDis = new MsgDis;msgDis->runMsgFunction(1);//根据消息ID找到对应的解析方法msgDis->runMsgFunction(2);msgDis->runMsgFunction(3);msgDis->runMsgFunction(4);getchar();return 0;}

 

参考了下这个：M$的文档