Client::Client(){
    cout << "Client is da *wink*";
    server = socket(AF_INET, SOCK_STREAM, 0);
    if (server == -1){
        perror("socket() failed");
        return;
    }
}

der fehler:

D:\Eigene Dateien\codeblocks\Socket\Client.h:21: error: `AF_INET' undeclared (first use this function)
D:\Eigene Dateien\codeblocks\Socket\Client.h:21: error: (Each undeclared identifier is reported only once for each function it appears in.)
D:\Eigene Dateien\codeblocks\Socket\Client.h:21: error: `SOCK_STREAM' undeclared (first use this function)
D:\Eigene Dateien\codeblocks\Socket\Client.h:21: error: `socket' undeclared (first use this function)
D:\Programme\CodeBlocks\bin\..\lib\gcc\mingw32\3.4.4\..\..\..\..\include\WinSock.h:450: error: `SOCKET socket(int, int, int)' used prior to declaration
:: === Build finished: 5 errors, 0 warnings ===

was muss ich hier anders machen??

achso includes etc passiern in einem header:

#include "Server.h"
#include "Client.h"
#include <sys/types.h>
#include <WinSock.h>
#include <windows.h>
#include <stdio.h>
#include <cstdio>
#include <iostream>
#include <winsock.h>
void initWinsock();

int initWinSock(){
    WSADATA wsa;
    if (WSAStartup(MAKEWORD(1, 1), &wsa))
    {
        printf("WSAStartup() failed, %lu\n", (unsigned long)GetLastError());
        return EXIT_FAILURE;
    }
    return 0;
}