WTF

class A
{
public:
    virtual void test () const
    {
        std::cout << "A::test()" << std::endl;
    }
    int i = 0;
};

class B :
    public A
{
public:
    virtual void test () const override
    {
        std::cout << "B::test()" << std::endl;
    }
    int i = 1;
};
int main ()
{
    using namespace std;
    {
        A *a = new A ();
        a->test ();
        cout << a->i << endl;
        B *b = static_cast<B *> (a);
        b->test ();
        cout << b->i << endl;
    }
    cin.get ();
    return 0;
}