获得本机IP

//gethostbyname

 

int _tmain(int argc, _TCHAR* argv[])
{
 WSADATA wsa;
 struct in_addr addr;
 hostent* host;

 

 if(WSAStartup(MAKEWORD(2,2), &wsa) != 0)
 {
  printf("load lib faild. err#:%d/n", WSAGetLastError());
  return 1;
 }

 

 host = gethostbyname("");

 

 printf("%s/n", host->h_name);
 printf("%d/n", host->h_addr_list[0]);
 
// memcpy(&addr.s_addr, host->h_addr_list[0], host->h_length);
 addr.s_addr = *(u_long*)host->h_addr_list[0];
 printf("%s/n", inet_ntoa(addr));

 WSACleanup();
 return 0;
}