C++编程TCP服务端的代码

#include //包含套接字的;

#include

void main()

{

    WORD wVersionRequested;

        WSADATA wsaData;

        int err;

        wVersionRequested = MAKEWORD( 1, 1);

        err = WSAStartup( wVersionRequested, &wsaData );

        if ( err != 0 )

    {

         return;

    }

        if ( LOBYTE( wsaData.wVersion ) != 1 ||HIBYTE( wsaData.wVersion ) != 1 ) 

    {                          

        WSACleanup( );

        return; 

    }

        SOCKET sockServer=socket(AF_INET,SOCK_STREAM,0);

        SOCKADDR_IN addrServer;

    addrServer.sin_addr.S_un.S_addr =htonl(INADDR_ANY);                

                            //网络字节序；INADDR_ANY对任何IP地址都有兴趣；

    addrServer.sin_family=AF_INET;

    addrServer.sin_port=htons(3000);                                   

                            //htons 转换字节长度；

    //addrServer.sin_zero=

    bind(sockServer,(SOCKADDR*)&addrServer,sizeof(SOCKADDR)) ;         

                             //(SOCKADDR*)强制类型转换；

    listen(sockServer,3);                                              

                             //监听最大个数int backlog；

    SOCKADDR_IN addrClient;

    int length=sizeof(SOCKADDR);

    while(1)                    //设置死循环；

    {

      SOCKET sockconnt= accept(sockServer,(SOCKADDR*)&addrClient,&length);  

      char recebuffer[100];                                            

                               //存放我们说话的字符；

      sprintf(recebuffer,"you receive the word: %s",inet_ntoa(addrClient.sin_addr)); 

                                //接收的是网路字节序，转化我们能看        

    得懂的实际的字节序，并存到buffer中；客户端的网际地址转化成IP地址；

    char sendbuffer[100];

        recv(sockconnt,recebuffer,100,0);

        send(sockconnt,sendbuffer,100,0);

        printf("%s",recebuffer);

        closesocket(sockconnt);

    }

}