Задание адреса gethostbyname

#include <cstdio>
#include <iostream>
 
#include <sys/socket.h>
#include <sys/types.h>
#include <netinet/in.h>
#include <netdb.h>
#include <arpa/inet.h>
 
using namespace std;
 
int main()
{
    cout << "----------------" << endl;
    cout << "|This is Client|" << endl;
    cout << "----------------" << endl << flush;
 
    sockaddr_in addres;
    hostent *he;
    //in_addr **addr_list;
    int sock;
    sock = socket(AF_INET, SOCK_STREAM, 0);
    if (sock == -1) {
        cout << "Socket initialization fault!" << flush;
        return 0;
    }
    addres.sin_family = AF_INET;
    addres.sin_port = htons(12345);
    addres.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
    //he = gethostbyname("192.168.2.15");
    //printf("Official name is: %s\n", he->h_name);
    //addr_list = (struct in_addr **)he->h_addr_list;s
    if (connect(sock, (struct sockaddr *)&addres, sizeof(addres)) == -1) {
        perror("Connection fault");
        return 0;
    }
    char s[1024];
    int l = recv(sock, s, 1024, 0);
    if (l < 0) {
        perror("recv");
        return 0;
    }
    s[l] = '\0';
    printf("l = %d, s = \"%s\"\n", l, s);
    close(sock);
    return 0;
}

struct hostent *hst;
struct sockaddr_in addr;
addr.sin_family      = AF_INET;
addr.sin_port        = htons(port);
 
if (inet_addr(host)!=INADDR_NONE)
      addr.sin_addr.s_addr = inet_addr(host);
else
      if (hst =gethostbyname(host))
         addr.sin_addr = *(struct in_addr *) hst->h_addr_list[0];
else 
{
         lg_write(0,"invalid address %s\n",host);
         c_release(sock);
         return 0;
}

struct hostent *hst;
struct sockaddr_in addr;
addr.sin_family      = AF_INET;
addr.sin_port        = htons(port);
 
if (inet_addr(host)!=INADDR_NONE)
      addr.sin_addr.s_addr = inet_addr(host);
else
      if ((hst =gethostbyname(host)) && hst->h_addrtype == AF_INET)
         addr.sin_addr = *(struct in_addr *) hst->h_addr_list[0];
else 
{
         lg_write(0,"invalid address %s\n",host);
         c_release(sock);
         return 0;
}