Question

如何用C语言获得本机IP地址

Answer 1

struct in_addr addr;
hostent *pHost = ::gethostbyname("localhost");//在此写入你自己电脑主机名字
switch (pHost->h_addrtype) {
case AF_INET:
printf("internet网络地址类型(AF_INET)\n");
break;
case AF_INET6:
printf("internet网络地址类型(AF_INET)\n");
break;
case AF_NETBIOS:
printf("netbios网络地址类型(AF_NETBIOS)\n");
break;
default:
printf("其它地址类型 %d\n", pHost->h_addrtype);
break;
}
printf("\t地址长度: %d(字节)\n", pHost->h_length);
addr.s_addr = *(u_long *) pHost->h_addr_list[0];
printf("\t第一个IP地址为: %s\n", inet_ntoa(addr));