c++socket accept问题

Question

 /*创建socket*/
void CreateServer(SOCKET &Socket, SOCKET &serverocket, char* ipaddress, int port){
    //初始化 DLL
    WSADATA wsaData;
    WSAStartup(MAKEWORD(2, 2), &wsaData);
    if (serverocket == NULL){

        Socket = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP);
        //绑定套接字
        sockaddr_in sockAddr;
        memset(&sockAddr, 0, sizeof(sockAddr));  //每个字节都用0填充
        sockAddr.sin_family = PF_INET;  //使用IPv4地址
        sockAddr.sin_addr.s_addr = inet_addr(ipaddress);  //具体的IP地址
        sockAddr.sin_port = htons((short)port);  //端口
        bind(Socket, (SOCKADDR*)&sockAddr, sizeof(SOCKADDR));
        //进入监听状态
        listen(Socket, 20);
        SOCKADDR clntAddr;
        int nSize = sizeof(SOCKADDR);
        cout << "Wait connection" << endl;

        serverocket = accept(Socket, (SOCKADDR*)&clntAddr, &nSize);
    }
}

不知道为什么accept不能够阻塞，原来的这段代码能够实现，但现在在一点没变的情况下不能阻塞了，求大神指点，不胜感激。

Answer 1

返回的是如果是INVALID_SOCKET, 调用下WSAGetLastError看啥错误