Who is right GCC or Visual C++

Hi,

The following code compiles fine on Visual C++ in a default created
project.

But it gives an error on GCC saying that
  "since at() doesn't depend on any template parameters it should be
available".
(I don't exactly know what that means either, but it can't seem to
find the at() function.)

I compiled using GCC (on Fedora Core 6) with the following command
line:

g++ test.cpp -o test

I doubt the code is correct, but I'm not sure why. Anyone any ideas?
Or is it the compiler that is wrong?

The code is:

// test.cpp
#include <iostream>
#include <vector>
#include <stdexcept>

// Entry
struct Entry {
  int number;
};

// Range checking vector
template< class T > class Vec : public std::vector< T > {
public:
  Vec () : std::vector< T > () { }
  Vec (int s) : std::vector< T > (s) { }

  // Range checking by using the at () method, which throws
out_of_range
  T& operator[] (int i) { return at (i); }
  const T& operator[] (int i) const { return at (i); }
};

int main (int argc, char** argv)
{
  try {
     Vec< Entry > vphone_book (1000);
    int j = vphone_book[1001].number;
  }
  catch (std::out_of_range e) {
    std::cout << "On the range checked vector, an exception is thrown"
<< std::endl;
  }

  return 0;
}

BTW. This is an example derived from chapter 3 of the C++ Programming
Language (Special Edition)

Thanks in advance,
Kind regards,
Roel.

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