#include <iostream>
#include <string>
#include <netdb.h>
#include <arpa/inet.h>

using namespace std;
const int BUFFER_SIZE{1000};

int main() {
    int i;
    string hostname;
   
    cout << "Enter the host name :";
    cin >> hostname;
    cout << endl;

    struct hostent * result{ gethostbyname(hostname.c_str())};

    if (result != nullptr) {

        cout << "The h_name field is  " << result->h_name << endl;

        if (result->h_aliases[0] != nullptr) {
            cout << "AKA: " << endl;
            i = 0;
            while (result->h_aliases[i] != nullptr) {
                cout << "\t" << result->h_aliases[i] << endl;
                ++i;
            }
        }

        if (result->h_addrtype == AF_INET) {
           cout << "\tThis is IPV4" << endl;
        } else if (result->h_addrtype == AF_INET6) {
           cout << "\tThis is IPV6" << endl;
        } else {
           cout << "\tUnknown address type " << endl;
        }

        cout << "\tThe address is " << result->h_length << " bytes." << endl;

        i = 0;
        char buffer[BUFFER_SIZE];

        while (result->h_addr_list[i] != nullptr) {
            cout << "\tThere is an address " << 
                 inet_ntop(result->h_addrtype, result->h_addr_list[i], 
                           buffer, BUFFER_SIZE)
                 << endl;
            ++i;
        }

    } else {
       herror("gethostbyname: ");
    }

    return 0;
}