windows socket 学习写的

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必须先启动一个选择服务器再 启动一个选择客服端  然后不能两个同时选择接受。。。。真吭人是吧没办法 啊

#pragma once#define  MSG_SIZE 100//消息的最大值#include <iostream>#include <string>#include <vector>#include <WinSock2.h>#pragma comment(lib,"wsock32.lib")using namespace std;class YdcSocket{public:YdcSocket(){}void InitYdcSocket(bool isServer){//初始化套接字动态库if ( WSAStartup(MAKEWORD(2,2),&wsd)!=0 ){ErrorMsg.push_back("WSAStartup failed!");}if (isServer){//创建套接字sServer = socket(AF_INET,SOCK_STREAM ,IPPROTO_TCP);if (INVALID_SOCKET == sServer){ErrorMsg.push_back("socket failed!");}//服务器套接字地址addrServ.sin_family = AF_INET;cout<<"正在启动服务器"<<endl;addrServ.sin_port = htons(4999);addrServ.sin_addr.s_addr = INADDR_ANY;Bind();Listen();Accept();}else{//创建套接字sClient = socket(AF_INET,SOCK_STREAM ,IPPROTO_TCP);if (INVALID_SOCKET == sServer){ErrorMsg.push_back("socket failed!");}//服务器套接字地址addrServ.sin_family = AF_INET;cout<<"正在启动客服端"<<endl;addrServ.sin_port = htons((short)4999);addrServ.sin_addr.s_addr = inet_addr("127.0.0.1");Connect();}}~YdcSocket(void){}public:void strat(){while (1){cin.clear();int n = 0;cout<<"1 发送 2 接收 其他 查看错误日志"<<endl;cin>>n;switch (n){case 1://发送cout<<"请输入你要发送的消息"<<endl;cin>>msg;Send();break;case 2://接收msg = "";cout<<"你将接收消息"<<endl;Recv();cout<<"你接受到的消息是:"<<msg<<endl;break;default:ShowError();break;}}}void Recv(){ZeroMemory(buf,MSG_SIZE);if (SOCKET_ERROR == recv(sClient,buf,MSG_SIZE,0)){ErrorMsg.push_back("非法关闭 failed!");closesocket(sServer);closesocket(sClient);WSACleanup();}else if (retVal == 0){ErrorMsg.push_back("正常关闭 failed!");closesocket(sServer);closesocket(sClient);WSACleanup();}msg = buf;}void Send(){cout<<strlen(msg.c_str());if (SOCKET_ERROR == send(sClient,msg.c_str(),strlen(msg.c_str()),0)){ErrorMsg.push_back("send failed!");closesocket(sClient);WSACleanup();}}private:vector<string>ErrorMsg;//错误消息stringmsg;//消息char buf[MSG_SIZE];//发送的消息WSADATAwsd;//WSADATA变量SOCKETsServer;//服务器套接字SOCKETsClient;//客服端套接字SOCKADDR_INaddrServ;//服务器地址intretVal;//还回值private:void Bind(){if (SOCKET_ERROR == ::bind(sServer,(LPSOCKADDR)&addrServ,sizeof(SOCKADDR_IN))){ErrorMsg.push_back("1 failed!");::closesocket(sServer);WSACleanup();}}void Listen(){if (::listen(sServer, SOMAXCONN) == SOCKET_ERROR){ErrorMsg.push_back("2 failed!");::closesocket(sServer);WSACleanup();}}void Accept(){cout<<"等待客服"<<endl;int m_addrLen = sizeof(addrServ);sClient = ::accept(sServer,(SOCKADDR*)&addrServ, &m_addrLen);if (sClient == INVALID_SOCKET){ErrorMsg.push_back("3 failed!");::closesocket(sClient);WSACleanup();}}void Connect(){//这里需要if (SOCKET_ERROR == ::connect(sClient, (LPSOCKADDR)&addrServ, sizeof(SOCKADDR_IN) ) ){ErrorMsg.push_back("4 failed!!");::closesocket(sClient);WSACleanup();}}void ShowError(){for (int i =0 ; i < ErrorMsg.size() ; i++){cout<<ErrorMsg.at(i)<<endl;}}};

// Socket类.cpp : 定义控制台应用程序的入口点。//#include "stdafx.h"#include "YdcSocket.h"int _tmain(int argc, _TCHAR* argv[]){YdcSocket y;int n;cout<<"请输入 1 选择为服务器  0 为客服端"<<endl;cin>>n;y.InitYdcSocket(n);y.strat();system("pause");return 0;}

然后呢我就想要是能否有多人随意点就好了想发就发想收就收那该多好啊。。

就想到了多线程结果发现这个是阻塞的（好乱的）

就找到了

winsock I/O模型

。。。简单的就是select 模型：了呵呵再写写