域名到IP的转换

/************************************************************************/
/* 域名到IP的转换 */
/************************************************************************//

#include <winsock2.h>
#include <stdio.h>

#pragma comment(lib,"ws2_32.lib")

const char str[20]={0};
char *hostIP=0;

void main()
{
//初始化库，没他不行
WSADATA wsa;
if (WSAStartup(MAKEWORD(2,2),&wsa)!=0)
{
printf("Winsock Initialization failed. ");
return;
}

//gethostbyname获得域名对应的IP
hostent *hp = gethostbyname(str);
if (hp)
{
//inet_ntoa把IP转换成文本型
hostIP = inet_ntoa(*(struct in_addr *)*hp->h_addr_list);
printf("host IP:%s ",hostIP);

}
}