TCP服务器/客户端

        TCP客户端源程序
        #include   <stdio.h>
        #include   <winsock2.h>
        #pragma   comment(lib,   "WS2_32.lib")

        #define   BUF_SIZE         1024
        #define   SERVER_IP       "127.0.0.1"
        #define   SERVER_PORT   5678

        int   main(int   argc,   char*   argv)
        {
                WSADATA   wsaData;
                SOCKADDR_IN   serverAddr;
                SOCKET   socketC;
                char   sendbuf[BUF_SIZE]   =   "Hello   TCP   World!";

                WSAStartup(MAKEWORD(1,1),   &wsaData);

                socketC   =   socket(AF_INET,   SOCK_STREAM,   IPPROTO_TCP);

                serverAddr.sin_family   =   AF_INET;
                serverAddr.sin_port   =   htons(SERVER_PORT);
                serverAddr.sin_addr.s_addr   =   inet_addr(SERVER_IP);

                connect(socketC,   (SOCKADDR*)&serverAddr,   sizeof(serverAddr));

                send(socketC,   sendbuf,sizeof(sendbuf),   0);

                closesocket(socketC);

                WSACleanup();

                return 0:
        }


        TCP服务器端源程序
        #include   <stdio.h>
        #include   <winsock2.h>
        #pragma   comment(lib,   "WS2_32.lib")

        #define   BUF_SIZE         1024
        #define   SERVER_IP       "127.0.0.1"
        #define   SERVER_PORT   5678

        int   main(int   argc,   char**   argv)
        {
                WSADATA   wsaData;
                SOCKET     socketL;     //   socket   for   listening
                SOCKET     socketC;     //   socket   for   Communication
                SOCKADDR_IN   serverAddr;
                int   nRet   =   -1;
                char   recvbuf[BUF_SIZE];

                WSAStartup(MAKEWORD(1,1),   &wsaData);

                socketL   =   socket(AF_INET,   SOCK_STREAM,   IPPROTO_TCP);

                serverAddr.sin_family             =   AF_INET;
                serverAddr.sin_port                 =   htons(SERVER_PORT);
                serverAddr.sin_addr.s_addr   =   htonl(INADDR_ANY);

                bind(socketL,   (SOCKADDR*)&serverAddr,   sizeof(serverAddr));

                listen(socketL,   5);

                socketC   =   accept(socketL,   NULL,   NULL);
                if   (socketC   !=   INVALID_SOCKET)
                {
                        nRet   =   recv(socketC,   recvbuf,   sizeof(recvbuf),   0);
                        if   (nRet   >   0)
                                printf("%s   ",   recvbuf);
                }

                closesocket(socketC);
                closesocket(socketL);

                WSACleanup();

                return   0;
        }