Windows下C++服务端和客户端Socket通信简单代码

<pre name="code" class="cpp">// Client.cpp : Defines the entry point for the console application.//#include "stdafx.h"#include "winsock2.h"#include <iostream>#pragma comment(lib, "ws2_32.lib")using namespace std;BOOLRecvLine(SOCKET s, char* buf);//读取一行数据int main(int argc, char* argv[]){const int BUF_SIZE = 64;WSADATAwsd;//WSADATA变量SOCKETsHost;//服务器套接字SOCKADDR_INservAddr;//服务器地址charbuf[BUF_SIZE];//接收数据缓冲区charbufRecv[BUF_SIZE];intretVal;//返回值//初始化套结字动态库if (WSAStartup(MAKEWORD(2,2), &wsd) != 0){cout << "WSAStartup failed!" << endl;return -1;}//创建套接字sHost = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);if(INVALID_SOCKET == sHost){cout << "socket failed!" << endl;WSACleanup();//释放套接字资源return  -1;}//设置服务器地址servAddr.sin_family =AF_INET;servAddr.sin_addr.s_addr = inet_addr("127.0.0.1");servAddr.sin_port = htons((short)4999);intnServAddlen  = sizeof(servAddr);//连接服务器retVal=connect(sHost,(LPSOCKADDR)&servAddr, sizeof(servAddr));if(SOCKET_ERROR == retVal){cout << "connect failed!" << endl;closesocket(sHost);//关闭套接字WSACleanup();//释放套接字资源return -1;}while(true){//向服务器发送数据ZeroMemory(buf, BUF_SIZE);cout << " 向服务器发送数据:  ";cin >> buf;retVal = send(sHost, buf, strlen(buf), 0);if (SOCKET_ERROR == retVal){cout << "send failed!" << endl;closesocket(sHost);//关闭套接字WSACleanup();//释放套接字资源return -1;}//RecvLine(sHost, bufRecv);recv(sHost, bufRecv,5 , 0);// 接收服务器端的数据， 只接收5个字符cout << endl <<"从服务器接收数据：" << bufRecv;}//退出closesocket(sHost);//关闭套接字WSACleanup();//释放套接字资源return 0;}

// Server.cpp : Defines the entry point for the console application.//#include "stdafx.h"#include "winsock2.h"#pragma comment(lib, "ws2_32.lib")#include <iostream>using namespace std;int _tmain(int argc, char* argv[]){ const int BUF_SIZE = 64; WSADATA wsd; //WSADATA变量 SOCKET sServer; //服务器套接字 SOCKET sClient; //客户端套接字 SOCKADDR_IN addrServ;; //服务器地址 char buf[BUF_SIZE];//接收数据缓冲区 char sendBuf[BUF_SIZE];//返回给客户端得数据 int retVal; //返回值 //初始化套结字动态库 if (WSAStartup(MAKEWORD(2,2), &wsd) != 0) {  cout << "WSAStartup failed!" << endl;  return 1; } //创建套接字 sServer = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);  if(INVALID_SOCKET == sServer) {  cout << "socket failed!" << endl;  WSACleanup();//释放套接字资源;  return -1; } //服务器套接字地址  addrServ.sin_family = AF_INET; addrServ.sin_port = htons(4999); addrServ.sin_addr.s_addr = INADDR_ANY;   //绑定套接字 retVal = bind(sServer, (LPSOCKADDR)&addrServ, sizeof(SOCKADDR_IN)); if(SOCKET_ERROR == retVal) {   cout << "bind failed!" << endl;  closesocket(sServer);//关闭套接字  WSACleanup(); //释放套接字资源;  return -1; } //开始监听  retVal = listen(sServer, 1); if(SOCKET_ERROR == retVal) {  cout << "listen failed!" << endl;    closesocket(sServer);//关闭套接字  WSACleanup(); //释放套接字资源;  return -1; } //接受客户端请求 sockaddr_in addrClient; int addrClientlen = sizeof(addrClient); sClient = accept(sServer,(sockaddr FAR*)&addrClient, &addrClientlen); if(INVALID_SOCKET == sClient) {  cout << "accept failed!" << endl;    closesocket(sServer);//关闭套接字  WSACleanup(); //释放套接字资源;  return -1; } while(true){  //接收客户端数据  ZeroMemory(buf, BUF_SIZE);  retVal = recv(sClient, buf, BUF_SIZE, 0);  if (SOCKET_ERROR == retVal)  {   cout << "recv failed!" << endl;     closesocket(sServer);//关闭套接字   closesocket(sClient);//关闭套接字     WSACleanup(); //释放套接字资源;   return -1;  }  if(buf[0] == '0')   break;  cout << "客户端发送的数据: " << buf <<endl;    cout << "向客户端发送数据: " ;  cin >> sendBuf;    send(sClient, sendBuf, strlen(sendBuf), 0); } //退出 closesocket(sServer);//关闭套接字 closesocket(sClient);//关闭套接字 WSACleanup(); //释放套接字资源; return 0;}