Protected Access

#include <iostream>
using namespace std;

class BaseDevice {
protected:
    int id;   // declare protected int id
    };

    class DerivedDevice : public BaseDevice {
    public:
        void setId(int newId) {   // sets the value of id
                id = newId;
                    }

                        void printId() {          // prints the value of id
                                cout << "Device ID: " << id << endl;
                                    }
                                    };

                                    int main() {
                                        DerivedDevice d;
                                            d.setId(101);
                                                d.printId();
                                                    return 0;
                                                    }