Private Inheritance

#include <iostream>
using namespace std;

class Device {
public:
    void showType() {
        cout << "Generic Device\n";
    }
};
class Actuator : private Device
{
public:
void showActuator()
{
    showType();
    cout<<"Actuator Device";
}
};
int main() {
    Actuator a;
    a.showActuator();  // should print both lines
    return 0;
}