Question] How can I get ...?

[변용덕]

Hello .
I can't write English well. If sentence are wrong ,then i hope your understand.
 
I have problem.
My source code compile in gcc 2.95.3 on linux system. This code has no problem.
but I changed gcc 3.2.1 compiler. 
I have many error and  warning.
for example..
I define
   fstream file_;
 and function use file_ member variable
   return file_.rdbuf()->fd();

 warning message 
  no matching function for call to `std::basic_filebuf<char,std::char_traits<char> >::fd()'

...


so i need your help.
how can I solve this problem?
and what is changed c++ standard?

I need document and reference site.


thank you!!