Re: array bound is not an integer constant

Hello,

Consider next example (consisting of 3 source and 2 header files) :

/////// fda0.hpp
#ifndef FDA0
#define FDA0
extern const unsigned int TOTAL_SIZE;
#endif

/////// fda0.cpp
#include "fda0.hpp"
const unsigned int TOTAL_SIZE( 10 );

/////// fda1.hpp
#ifndef FDA1
#define FDA1
#include "fda0.hpp"
struct A
{
    void print();
    unsigned int buffer[ TOTAL_SIZE ];
};
#endif

/////// fda1.cpp
#include "fda1.hpp"
#include <iostream>
void A::print()
{
    for ( unsigned int i=0; i < TOTAL_SIZE; ++ i )
    {
        std::cout<<buffer[i]<<" ";
    }
    std::cout<<std::endl;
}

/////// fda2.cpp
#include "fda1.hpp"
int main()
{
    A a;
    a.print();
}

I am using g++ 4.3.0 to compile it as:
g++ fda0.cpp fda1.cpp fda2.cpp
and the error I am getting is next:
g++ fda1.cpp fda0.cpp fda2.cpp
In file included from fda1.cpp:3:
fda1.hpp:11: error: array bound is not an integer constant
fda1.cpp: In member function ?void A::print()?:
fda1.cpp:11: error: ?buffer? was not declared in this scope
In file included from fda2.cpp:3:
fda1.hpp:11: error: array bound is not an integer constant

What is the cause of this error and how to fix it?