Fix Lost Driver Data

Question

Problem: Fix Lost Driver Data. Solve this hands-on electronics task on EWskills.

Accepted Answer

#include 
using namespace std;

// Base driver class
class BaseDriver {
public:
    BaseDriver(int v) : baseConfig(v) {}

    void printBase() const {
        cout << "Base config " << baseConfig << endl;
    }

protected:
    int baseConfig;
};

// Derived driver class
class DerivedDriver : public BaseDriver {
public:
    DerivedDriver(int b, int d) : BaseDriver(b), derivedConfig(d) {}

    void printDerived() const {
        cout << "Derived config " << derivedConfig << endl;
    }

private:
    int derivedConfig;
};

// Base handler
void processDriver(const BaseDriver& driver) {
    driver.printBase();
}

// Overload for derived driver
void processDriver(const DerivedDriver& driver) {
    driver.printBase();
    driver.printDerived();
}

int main() {
    int baseVal, derivedVal;
    cin >> baseVal >> derivedVal;

    DerivedDriver driver(baseVal, derivedVal);
    processDriver(driver);

    return 0;
}

Explanation & Logic Summary:

Passing objects incorrectly can cause part of the object to be ignored.
Passing by reference avoids unnecessary copying.
Function overloading ensures the correct function is selected at compile time.
No virtual functions or dynamic memory are required.

Firmware Relevance & Real-World Context:

This problem reinforces:

Safe object passing in firmware
Preventing silent configuration loss
Compile-time polymorphism
Writing predictable, allocation-free C++ code

142. Fix Lost Driver Data