Multilevel Driver Initialization

#include <iostream>
using namespace std;

// TODO 1: Create CoreDriver class
//         - Constructor prints "Core driver initialized"

// TODO 2: Create CommDriver class
//         - Publicly inherits from CoreDriver
//         - Constructor prints "Comm driver initialized"

// TODO 3: Create SpiDriver class
//         - Publicly inherits from CommDriver
//         - Constructor takes int speed
//         - Prints "SPI driver initialized"
//         - Stores speed
//         - Function prints "SPI speed <speed>"
class CoreDriver {
    public: 
        CoreDriver() {
            cout << "Core driver initialized" << endl;
        }
}; 

class CommDriver : public CoreDriver {
    public:
        CommDriver() {
            cout << "Comm driver initialized" << endl;
        }
};

class SpiDriver: public CommDriver{    
    private: 
        int speed; 
    public: 
        SpiDriver(int s) : speed(s) {
            cout << "SPI driver initialized" << endl;
        }
        void printSpeed() const {
        cout << "SPI speed " << speed << endl;
    }
};


int main() {
    int speed;
    cin >> speed;

    // TODO 4: Create SpiDriver object
    // TODO 5: Call function to print SPI speed
    SpiDriver spi(speed); 
    spi.printSpeed(); 

    return 0;
}

Solving Approach