错误 3 错误 C2440：“正在初始化”：无法从“void *”转换为“Socket *”

Question

I have problem when I implamante default constructor but I have error

Error 3 error C2440: 'initializing' : cannot convert from 'void *' to 'Socket *' Webserver.h 164 1 Project2_SocketLib

Socket.h
    //SOCKET Accept(sockaddr* clientInfo,int* clientInfoSize)
    SOCKET Accept()
    {
        static int size = sizeof(sockaddr);
        return accept(this->hSocket, 0,0);
    }
Webserver.h
    Webserver(short port_to_listen,request_func rf,HWND Hwnd, WPARAM wParam, LPARAM lParam)
    {
        Socket in(port_to_listen,"INADDR_ANY", true, Hwnd, true);

        //request_func = rf;

        while (1) {
            Socket* ptr_s =(void*) in.Accept();

            unsigned ret;
            _beginthreadex(0,0,Request, ptr_s,0,&ret);
        }

    }

Answer 1

Why you are explicitly type casting to void *

 Socket* ptr_s =(void*) in.Accept();

Should be,

Socket sock = in.Accept();

Accept returns SOCKET. No need to convert it to void * or Socket *

Answer 2

我希望这会奏效

Socket* ptr_s =static_cast<Socket*>( in.Accept());

Answer 3

In C++, unlike in C, a void* can't be implicitly converted to a pointer to object. Instead, you should cast directly to the target pointer type:

Socket* ptr_s = reinterpret_cast<Socket*>(in.Accept());

Note: Prefer C++-style casts over C-style casts. They are more explicit in their intent and they are easier to search for.