Multilevel Driver Initialization

#include <iostream>
using namespace std;

// Create CoreDriver class
// Constructor prints "Core driver initialized"
class CoreDriver {
public:
    CoreDriver() {
        cout << "Core driver initialized" << endl;
    }
};

// Create CommDriver class
// Publicly inherits from CoreDriver
// Constructor prints "Comm driver initialized"
class CommDriver : public CoreDriver {
public:
    CommDriver() {
        cout << "Comm driver initialized" << endl;
    }
};

// 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 sp) {
        cout << "SPI driver initialized" << endl;
        speed = sp;
    }
    void print() {
        cout << "SPI speed " << speed << endl;
    }
};

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

    // Create SpiDriver object
    SpiDriver spi(speed);
    // Call function to print SPI speed
    spi.print();

    return 0;
}