How to access protected members in a derived class?

Question

From http://www.parashift.com/c++-faq-lite/basics-of-inheritance.html#faq-19.5

A member (either data member or member function) declared in a protecte

Answer 1

Well, if friend is ok, then this angle may as well be ok:

#include 

class X {
private:
    int var;
protected:
    virtual void fun() {
        var = 10;
        std::cout << "\nFrom X" << var;
    }

    static void Fun(X& x) {
        x.fun();
    }
};

class Y : public X {
private:
    int var;
public:
    virtual void fun() {
        var = 20;
        std::cout << "\nFrom Y" << var;
    }

    void call() {
        fun();
        X objX;
        objX.fun(); /* << ne-ne */
        Fun(objX); /* << ok */
    }
};

Of course, be mindful of the type you pass to X::Fun if you use this as-is.