Explain public derivation, C/C++ Programming

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Public derivation

Public derivations are much more common than private derivations. In this situation:

The private members inherited from the base class are inaccessible to new members' functions in the derived class.
The public members inherited from the base class might be accessed by new members functions in the derived class and by instances of the derived class.

e.g.

class base

{

private :

int number;

};

class derived : public base

{

public :

void f()

{

++number; // Private base member not

accessible

}

};

The compiller error message is ' base :: number ' is not accessible in the function derived::f();

Here, only if the number is public then you can access it.

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