Problem with protected fields in base class in c++

Question

I have a base class, say BassClass, with some fields, which I made them protected, and some pure virtual functions. Then the derived class, say DerivedCla

Answer 1

This works:

#include 

struct Base {
virtual void print () const = 0;
protected:
int val;
};

struct Derived : Base {
void print () { std::cout << "Bases's val: " << val << std::endl; }
};