Multilevel Driver Initialization

#include <iostream>
using namespace std;

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

class CoreDriver
{
public:
    CoreDriver()
    {
        cout << "Core driver initialized\n";
    }
};

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

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

// 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 SpiDriver : public CommDriver
{
private:
    int speed;

public:
    SpiDriver(int s) : speed(s) 
    {
        cout << "SPI driver initialized\n";
    };

    void print()
    {
        cout << "SPI speed " << speed << "\n";
    }
};

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

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

    return 0;
}

Solving Approach