Question

我创建一个套接字类，它有一个静态成员，用于创建不同类型的套接字（客户端和服务器）。这是界面：

    class Socket{
    public:
        int sendData(std::string _data);
        std::string receiveData();

        int closeSocket();

    protected:      
        Socket();
        virtual int initializeSocket() = 0;
        virtual int connectSocket() = 0;


    public:     // static members: Factory, etc.
        static Socket* createClientSocket(std::string _ip, std::string _port);
        static Socket* createServerSocket(std::string _port);

    protected:  
        WSADATA mWsaData;
        SOCKET mSocket;

        addrinfo *mResult, mHints;

孩子们：

- ＆GT;服务器：

    class ServerSocket: public Socket{
    private:
        ServerSocket(const std::string _port);
        ~ServerSocket();

        int acceptClient();

    private:
        SOCKET mClientSocket;

        std::string mPort;
    };  //  class ServerSocket

- ＆GT;客户端：

    class ClientSocket: public Socket{
    private:
        ClientSocket(const std::string _ip, const std::string _port);
        ~ClientSocket();

    private:
        addrinfo *mPtr;

        std::string mServerIp, mServerPort;
    };  //  class ClientSocket

但是在实现initializeSocket和其他成员时我得到错误“不允许继承的成员。就我而言，继承的类可以访问父类的public和protected memb。为什么会出现这个错误？

提前致谢：）

编辑：许多成员都会出现错误，例如在ServerSocket.cpp

中

int ServerSocket::initializeSocket(){  <<--- HERE in the name of the function appears 
    // Resolve the server address and port
    int iResult = getaddrinfo(NULL, mPort.c_str(), &mHints, &mResult);
    if ( iResult != 0 ) {
        printf("getaddrinfo failed with error: %d\n", iResult);
        WSACleanup();
        return 1;
    }

    //..... ETC....

    freeaddrinfo(mResult);

    iResult = listen(mSocket, SOMAXCONN);
    if (iResult == SOCKET_ERROR) {
        printf("listen failed with error: %d\n", WSAGetLastError());
        closesocket(mSocket);
        WSACleanup();
        return 1;
    }
    return 0;
   }

我在哪里写了“＆lt;＆lt; - HERE ......”

1>..\..\source\core\comm\ServerSocket.cpp(37): error C2509: 'initializeSocket' : member function not declared in 'BOViL::comm::ServerSocket'
1>          c:\programming\bovil\source\core\comm\ServerSocket.h(18) : see declaration of 'BOViL::comm::ServerSocket'

Answer 1

错误是派生类没有在声明中声明成员函数。

    class ClientSocket: public Socket{
    public:
        int sendData(std::string _data);  <<--- Add this

    private:
        ClientSocket(const std::string _ip, const std::string _port);
        ~ClientSocket();

        int initializeSocket(); <<--- Add this
        int connectSocket();  <<--- Add this

    private:
        addrinfo *mPtr;

        std::string mServerIp, mServerPort;
    };  //  class ClientSocket

等在另一个班级

cpp套接字，继承错误

1 个答案: