38protectedmode.cpp

#include <iostream>
using namespace std;

class base
{
    // What is protected mode or member?
    // protected members are the members that act similar to private members but can be inherited, i.e. they can't be accessed but inherited
protected:
    int a;

private:
    int b;
};
class derived : protected base
{
    int c;

public:
};
/*
Table of mode and derivation

MODE        |   Private Derivation  |   Public Derivation   |   Protected Derivation

Private     |   not inherited       |   not inherited       |   not inherited
Public      |   private             |   public              |   protected
Protected   |   private             |   protected           |   protected
*/
int main()
{
    base k;
    cout << k.a; // here a can't be accessed as it is protected
    derived j;
    cout << j.a; // even in derived class, a can't be accessed as it is protected
    return 0;
}