Windows下C++服务端和客户端Socket通信简单代码

 "code" class="cpp">// Client.cpp : Defines the entry point for the console application.
 //
 #include "stdafx.h"
 #include "winsock2.h"
 #include
 #pragma comment(lib, "ws2_32.lib")
 using namespace std;
 BOOL    RecvLine(SOCKET s, char* buf);  //读取一行数据
 int main(int argc, char* argv[])
 {
     const int BUF_SIZE = 64;
     WSADATA         wsd;            //WSADATA变量
     SOCKET          sHost;          //服务器套接字
     SOCKADDR_IN     servAddr;       //服务器地址
     char            buf[BUF_SIZE];  //接收数据缓冲区
     char            bufRecv[BUF_SIZE];
     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
     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);
     int nServAddlen  = 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
 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 <

   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;
 }