Re: anti-standard code can compile -- about template class

I have tried if we try to instantise the code I posted in my original
question, it can not compile. Here is my code. Does this compile error
because of VC will look for global i other than base class i? I do not know
why if the class is instantised, still the global i other than base class i
is looked for?

here is the compile error message. It is appreciated if you could review my
code and comment?

1>d:\visual studio 2008\projects\test_template4\test_template4\main.cpp(20)
: error C2065: 'i' : undeclared identifier
1> d:\visual studio 2008\projects\test_template4\test_template4\main.cpp(20)
: while compiling class template member function 'int Derived<T>::get_i(void)'
1> with
1> [
1> T=int
1> ]
1> d:\visual studio 2008\projects\test_template4\test_template4\main.cpp(25)
: see reference to class template instantiation 'Derived<T>' being compiled
1> with
1> [
1> T=int
1> ]

[Code]

#include <iostream>

using namespace std;

template <typename T> struct Base {
public:
    Base (int _i): i (_i)
    {

    }

    int i;
};

template <typename T> struct Derived : public Base<T> {
public:
    Derived (int _i) : Base<T> (_i)
    {
    }
    int get_i() { return i; }
};

int main()
{
    Derived<int> d (200);
    cout << d.get_i() << endl; // output 200
    return 0;
}
[/Code]

regards,
George