tut38_private.cpp

// Single Inheritance Deep Dive : Examples + Code

#include <iostream>
using namespace std;

class Base
{
    int data1; // private by default and is not inheritable.
public:
    int data2;
    void setData();
    int getData1();
    int getData2();
};

void Base :: setData (void){
    data1 = 10;
    data2 = 20;
}

int Base :: getData1(){
    return data1;
}

int Base :: getData2(){
    return data2;
}

class Derived : private Base { // class is being derived privatelly
    int data3;
public:
    void process();
    void display();
};

void Derived :: process(){
    setData();
    data3 = data2 * getData1();
}

void Derived :: display(){
    cout<<"Value of data 1 is "<<getData1()<<endl;
    cout<<"Value of data 2 is "<<data2<<endl;
    cout<<"Value of data 3 is "<<data3<<endl;
}

int main(){
    Derived der;
    // der.setData();
    der.process();
    der.display();
    return 0;
}