How to construct an object derived from class ostream in g++ version 3

["Edwin Chan/Toronto/IBM" <edwinc@ca.ibm.com>]

 Here's a test file to show what I really meant.

#include <iostream.h>
class PageStream: virtual public ios, public ostream{
public:
   PageStream();
};
PageStream::PageStream(){}
int main(){return 0;}

This is the error message:

t.cpp: In constructor `PageStream::PageStream()':
t.cpp:11: no matching function for call to `std::basic_ostream<char,
std::char_traits<char> >::basic_ostream()'
/.../torolab.ibm.com/fs/projects/vabld/run/gcc/3.0.3/include/g++-v3/bits/std_ostream.h:177:

candidates are: std::basic_ostream<_CharT, _Traits>::basic_ostream(const
std::basic_ostream<_CharT, _Traits>&) [with _CharT = char, _Traits =
std::char_traits<char>]
/.../torolab.ibm.com/fs/projects/vabld/run/gcc/3.0.3/include/g++-v3/bits/std_ostream.h:67:

std::basic_ostream<_CharT, _Traits>::basic_ostream(std::basic_streambuf
<_CharT, _Traits>*) [with _CharT = char, _Traits = std::char_traits<char>]

What is required to match the function call? Is there something missing in
the constructor?

Thank you for your acknowledgement.