通过域名获得主机IP地址:
#include <stdio.h>
#include <unistd.h>
#include <netdb.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
int main(int argc,char **argv)
{
struct hostent *hent;
int i;
hent = gethostbyname("baidu.com");
printf("hostname: %s\n address list: \n", hent->h_name);
for(i = 0; hent->h_addr_list[i]; i++)
{
printf("%s\n", inet_ntoa(*(struct in_addr*)(hent->h_addr_list[i])));
}
return 0;
}