Winsock problem z gethostbyname

[mojprzyjaciel]

Witam zacząłem nauke winsocka, i wystąpiła pierwsza przeszkoda przy nauce ten błąd :

error C4996: 'gethostbyname': Use getaddrinfo() or GetAddrInfoW() instead or define _WINSOCK_DEPRECATED_NO_WARNINGS to disable deprecated API warnings.

a tu kod :

	if((host=gethostbyname("localhost"))==NULL)
	{
		std::cout << "Nie mozna rozpoznac nazwy hosta\r\n";
		WSACleanup();
		system("PAUSE");
		return 0;
	}

Niby problem powinien minąć po zmianie gethostbyname na getaddrinfo() lub GetAddrInfoW()

ale potem pojawia sie nastepny error 

Dla getaddrinfo
if ((host=getaddrinfo("localhost")) == NULL)
error C3861: 'getaddrinfo': identifier not found
IntelliSense: identifier "getaddrinfo" is undefined


Dla GetAddrIndoW
if ((host=GetAddrInfoW("localhost")) == NULL)
error C3861: 'GetAddrInfoW': identifier not found
IntelliSense: identifier "GetAddrInfoW" is undefined

Jak takie błędy naprawic?

 

Bilbioteki jakich używam : 

#include "stdafx.h"
#include <iostream>
#include <WinSock2.h>
#pragma comment(lib,"ws2_32.lib")

[Le petit nègre]

IntelliSense: identifier "GetAddrInfoW" is undefined

znaczy ze visual nie wie co to znaczy - rownie dobrze mozesz napisac int x = asdhasdjasdsa(1,2,3,4,5) i visual tez nie bedzie wiedzial co to - poszukaj w jakim includzie znajduje sie ta funkcja.

 

cytat z stackoverflow:

 

 

On Windows, instead of the includes you have mentioned, the following should suffice:

#include <winsock2.h>

#include <windows.h>

You'll also have to link to ws2_32.lib. It's kind of ugly to do it this way, but for VC++ you can do this via: #pragma comment(lib, "ws2_32.lib")

Some other differences between Winsock and POSIX include:

• You will have to call WSAStartup() before using any socket functions.

• close() is now called closesocket().

• Instead of passing sockets as int, there is a typedef SOCKET equal to the size of a pointer. You can still use comparisons with -1 for error, though Microsoft has a macro called INVALID_SOCKET to hide this.

• For things like setting non-blocking flags, you'll use ioctlsocket() instead of fcntl().

• You'll have to use send() and recv() instead of write() and read().