Convert Url to IP address in C++.

Convert Url to IP address in C++.


//Convert Url to IP address in C++.
#include <iostream>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <stdlib.h>
//#include<<errno.h>
#include <string.h>
#include <unistd.h>
#include <netdb.h>
#include <unistd.h>
#include <stdio.h>

using namespace std;

int hostname_to_ip(char * hostname , char* ip); // url to ip

int main(){
    char hn[] = "www.google.com";
    char *hostname = hn;
    char ip[100];
    hostname_to_ip(hostname, ip);
    printf("%s resolved to %s" , hostname , ip);
    return 0;
}

int hostname_to_ip(char * hostname , char* ip)
{
struct hostent *he;
struct in_addr **addr_list;
int i;

if ( (he = gethostbyname( hostname ) ) == NULL)
{
// get the host info
herror("gethostbyname");
return 1;
}

addr_list = (struct in_addr **) he->h_addr_list;

for(i = 0; addr_list[i] != NULL; i++)
{
//Return the first one;
strcpy(ip , inet_ntoa(*addr_list[i]) );
return 0;
}

return 1;
}