WinSockDNS-Oceniane_1

// WinSockDNS-Oceniane_1.cpp : Defines the entry point for the console application.
//

#include "stdafx.h"
#include <winsock.h>
#include <conio.h>
#include <Windows.h>
#include <locale.h>
#include <iostream>
#pragma comment(lib,"WS2_32.lib")

using namespace std;


class DNS {
private:
    char buff[255];
    void showError() {
        char text[1024];
        FormatMessageA(FORMAT_MESSAGE_FROM_SYSTEM, 0, WSAGetLastError(), 0, text, sizeof(text), NULL);
        printf("%s\n", text);
    }
public:
    DNS() {
        WSADATA ws;
        int result = WSAStartup(MAKEWORD(1, 0), &ws);
        if (result != 0)
        {
            printf("Błąd inicjalizacji funkcji WSAStartup\n");
            return;
        }
        showError();
        result = gethostname(buff, sizeof(buff));
        if (result != 0) {
            printf("Błąd inicjalizacji funkcji gethostname\n");
            return;
        }
        printf("Nazwa hosta: %s\n", buff);
    }

    ~DNS() {
        WSACleanup();
        showError();
    }

    void getIP(char *hostname){
        HOSTENT *h = gethostbyname(hostname);
        if (h != 0)
        {
            int i = 0;
            while (h->h_addr_list[i] != 0)
                printf("[%d]: %s\n", i, inet_ntoa(*(in_addr*)h->h_addr_list[i++]));
        }
        showError();
    }
};

int main()
{
    setlocale(LC_ALL, "pl-PL");
    char hostname[255];
    DNS d;
    do {
        printf("Podaj nazwe domeny: ");
        cin >> hostname;
        d.getIP(hostname);
        _getch();
        system("cls");
    }
    while (hostname != "\n");
    d.~DNS();
    system("PAUSE");
    return 0;
}