virtual inhirtence

class B
{
public:
    B(char c = 'a') : m_c(c) {}
public:
    char get_c() const { return m_c; }
    void set_c(char c) { m_c = c; }
private:
    char m_c;
};
class C
    : virtual public A
    , public B  ///Can be virutal
{ };
class D
    : virtual public A
    , public B  //Can be Virtual
{ };
class E
    : public C   //Can be Virtual
    , public D   // Can be virtual
{ };
int main()
{
    E e;
   // C &c = e;
    D &d = e;
    C &c = e;
    std::cout << c.get_c() << d.get_n();
    c.set_n(3);
    d.set_c('b');//d is not inherited virtually. So, it won't set it ..
    std::cout << c.get_c() << d.get_n() << std::endl;// a2a3
    return 0;
}
                                                                                                                                                                                    58,1          Bot