example3_virtual_destructors.cpp

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#include <iostream>

class Base {
public:
    Base() {
        std::cout << "Base constructor called." << std::endl;
    }
    virtual ~Base() {  // Virtual destructor
        std::cout << "Base destructor called." << std::endl;
    }
};

class Derived : public Base {
public:
    Derived() {
        std::cout << "Derived constructor called." << std::endl;
    }
    ~Derived() {
        std::cout << "Derived destructor called." << std::endl;
    }
};

int main() {
    Base* basePtr = new Derived();
    delete basePtr;  // Correctly calls Derived's destructor followed by Base's destructor

    return 0;
}