37singleinherit.cpp

#include <iostream>
using namespace std;

class base
{
    int data1; // private data of base class, not inheritable

public:
    int data2;
    void setData();
    int getData1();
    int getData2();
};
void base ::setData()
{
    data1 = 10;
    data2 = 9;
}
int base ::getData1()
{
    return data1;
}
int base ::getData2()
{
    return data2;
}
class derived : public base
{
    int data3;

public:
    void process();
    void display();
};

void derived ::process()
{
    data3 = data2 * getData1(); // since data1 is not inherited, we can access it through getData1() function that is inherited
}
void derived ::display()
{
    cout << "The Value of data1 is : ";
    cout << getData1() << endl;
    cout << "The Value of data2 is : " << data2 << endl;
    cout << "The Value of data3 is : " << data3 << endl;
}
int main()
{
    derived d1;
    d1.setData(); // if the visibility mode is set to private, we can't directly call this function as it will be private for derived class object
    d1.process(); // to acccess above function in private mode, insert it in this to access
    d1.display();
    return 0;
}