Protected Inheritance

#include <iostream>
using namespace std;

// Base class
class Device {
public:
    void showType() {
        cout << "Generic Device" << endl;
    }
};

// Derived class with protected inheritance
class Sensor : protected Device {
public:
    void showSensor() {
        showType();           // Can access showType() because inheritance is protected
        cout << "Sensor Device" << endl;
    }
};

int main() {
    Sensor s;
    s.showSensor();           // Can call only showSensor(), not showType() directly
    return 0;
}