#include <iostream>

class B
{
    public:
        B() { a = 0; b = 1; c = 2; }
        friend class A;
        int a;

    protected:
        int b;

    private:
        int c;

};

class C : public B
{
};

class A
{
    public:
        B b;
        C c;

        void test()
        {
            std::cout <<b.a <<";;" <<b.b <<";;" <<b.c <<std::endl;
            std::cout <<c.a <<";;" <<c.b <<";;" <<c.c <<std::endl;
        }
};

int main()
{
    A a;

    a.test();
}