c++ public vs private inheritancce

Question

I don't understand and i really don't get public vs private inheritance in classes. Suppose we have the following code:

class A {
    int A_a;
protected:
    int A_b;
public:
    int A_c;
};
class B : public A {
    int B_a;
protected:
    int B_b;
public:
    int B_c;
};

class C : private A {
    int C_a;
protected:
    int C_b;
public:
    int C_c;
};

I know it has to be with access rights over vars and funcs, but doing all the tests i really can grasp it and i don't know when to apply public or private inheritance;

This is not a site for explaining the basic semantics of a programming language - that's what textbooks are for. Which C++ textbook are you using? — , Oct 31 '18 at 22:38
Sorry, i know. But my english in sometimes missleading and im using this old book in pdf "Object-Oriented Programming in C++, Fourth Edition". — Lucas, Oct 31 '18 at 23:27

score -1 · Accepted Answer · answered Oct 31 '18 at 22:50

Here is simple sheme (base class -> derived clas) how visibility of class members change with different types of inheritance:

Public inheritance:

public -> public
protected -> protected
private -> private

Protected inheritance:

public -> protected
protected -> protected
private -> private

Private inheritance:

public -> private
protected -> private
private -> private

Here you have few simple examples https://www.tutorialspoint.com/cplusplus/cpp_inheritance.htm

c++ public vs private inheritancce

1 Answers1