Access Specifier Example in C++

This code defines two classes Base and Derived where Derived is derived from Base class publicly. The Base class has private, protected, and public data members and a member function funBase() which initializes and displays the sum of a, b, and c.

The Derived class does not have any data members or member functions but inherits the Base class's public and protected data members. In the main function, an object of Base class is created named b. The funBase() function of Base class is called using the b object which initializes and displays the sum of a, b, and c.

The code tries to access the private data member a and protected data member b of the Base class outside the class, which is not allowed. The c data member of Base class can be accessed outside the class.

Source Code

#include<iostream>
using namespace std;
class Base
{
private:
    int a;
protected:
    int b;
public:
    int c;
    void funBase()
    {
        a=10;
        b=5;
        c=15;
        cout<<"Result :"<<a+b+c;
    }
};
class Derived:public Base
{
public:
    void funDerived()
    {
       // a=10;
        b=5;
        c=15;
    }
};
int main()
{
    Base b;
    b.funBase();
 
//    b.a=10; Private
   // b.b=5;  Protectd
    b.c=20;
}

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Output

Result :30

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