/* * getaddrbyname.c * *  Created on: Dec 3, 2012 *      Author: fsxchen *      将域名转换为IP地址 */#include #include #include int main(int args, char **argv){	struct hostent *hptr;	char str[128];	if((hptr = gethostbyname(argv[1])) == NULL)	{		printf("Failed to get address\n");		return -1;	}	printf("It's ip address is %s\n",inet_ntop(hptr->h_addrtype, *hptr->h_addr_list, str, sizeof(str) ));	return 0;}

代码，比较简单，其实就是调用了一个函数，单数函数返回的结果处理十一个关键！gethostbyname()读取的是DNS的A记录！