各位老师们好，接受不到数据

//////////////////////////////////////////////////////

// select.cpp文件





#include <stdio.h>





#include <winsock2.h>

#pragma comment(lib, "WS2_32")    // 链接到WS2_32.lib



class InitWinSock

{

public:

    InitWinSock(BYTE minorVer = 2, BYTE majorVer = 2)

    {

        // 初始化WS2_32.dll

        WSADATA wsaData;

        WORD sockVersion = MAKEWORD(minorVer, majorVer);

        if(::WSAStartup(sockVersion, &wsaData) != 0)

        {

            exit(0);

        }

    }

    ~InitWinSock()

    {

        ::WSACleanup();

    }

};





#include <windows.h>

#include <process.h>









InitWinSock theSock;



FD_SET g_fdRead;



FD_SET g_allSet;        //全集



SOCKET g_sListen;







unsigned long _stdcall ThreadFun(void*)

{

    while(1)

    {



        g_fdRead=g_allSet;



        timeval  timeval;



        timeval.tv_sec=0;

        timeval.tv_usec=0;



        int nRet = ::select(0, &g_fdRead, NULL, NULL, &timeval);



        printf("%d\n",nRet);



        if(nRet<=0)

        {

            Sleep(500);

            continue;

        }



        //检测是否有新连接，或者有数据传输

        if(FD_ISSET(g_sListen,&g_allSet))

        {

            SOCKET stmp=NULL;

            sockaddr_in sockadd;

            int nLen=sizeof(sockaddr_in);



            stmp=accept(g_sListen,(sockaddr*)&sockadd,&nLen);



            FD_SET(stmp,&g_allSet);



        }



//可以运行到for 循环中!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!





        for(int i=0;i< g_fdRead.fd_count;i++)

        {



            if(FD_ISSET(g_fdRead.fd_array[i],&g_allSet))

            {



                SOCKET stmp=NULL;

                sockaddr_in sockadd;

                int nLen=sizeof(sockaddr_in);

                char buf[200];

                ZeroMemory(buf,sizeof(buf));

                recv(g_fdRead.fd_array[i],buf,sizeof(buf),0);



                printf("接受数据为：%s\n",buf);

            }

        



        }





        Sleep(500);



    } //end while





    return 0;



}





int main()

{

    



    USHORT nPort = 9585; // 此服务器监听的端口号



    // 创建监听套节字

    g_sListen = ::socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);

    sockaddr_in sin;

    sin.sin_family = AF_INET;

    sin.sin_port = htons(nPort);

    sin.sin_addr.S_un.S_addr = INADDR_ANY;

    // 绑定套节字到本地机器

    if(::bind(g_sListen, (sockaddr*)&sin, sizeof(sin)) == SOCKET_ERROR)

    {

        printf(" Failed bind() \n");

        return -1;

    }

    // 进入监听模式

    ::listen(g_sListen, 5);







    FD_ZERO(&g_allSet);



    FD_ZERO(&g_fdRead);





    FD_SET(g_sListen,&g_allSet);



    // HANDLE hThread=(HANDLE)_beginthreadex(NULL,0,ThreadFun,NULL,0,NULL);



    HANDLE hThread=CreateThread(NULL,0,ThreadFun,0,0,NULL);



    WaitForSingleObject(hThread,-1);



    CloseHandle(hThread);







    return 0;

}