Destructor Order Inheritance

Question

Problem: Destructor Order Inheritance. Solve this hands-on electronics task on EWskills.

Accepted Answer

#include 
using namespace std;

// Base driver class
class BaseDriver {
public:
    BaseDriver() {
        cout << "Base driver initialized" << endl;
    }

    ~BaseDriver() {
        cout << "Base driver destroyed" << endl;
    }
};

// Derived driver class
class DerivedDriver : public BaseDriver {
public:
    DerivedDriver() {
        cout << "Derived driver initialized" << endl;
    }

    ~DerivedDriver() {
        cout << "Derived driver destroyed" << endl;
    }
};

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

    DerivedDriver driver;

    return 0;
}

Explanation & Logic Summary:
When an object goes out of scope, C++ destroys it in reverse order of construction.
The derived class is destroyed first, followed by the base class.

Firmware Relevance & Real-World Context:
In embedded systems:

Derived drivers often release device-specific resources (disable peripheral, stop DMA)
Base drivers release shared resources (clocks, buses, power domains)

Destructor order guarantees that:

Hardware is shut down safely
Shared resources are not released before dependent peripherals

138. Destructor Order Inheritance