Is it possible to change a C++ object's class after instantiation?

Question

I have a bunch of classes which all inherit the same attributes from a common base class. The base class implements some virtual functions that work in general cases, whilst eac

Answer 1

 #include 
class Base {
public:
    virtual void whoami() { 
        std::cout << "I am Base\n"; 
    }
};

class Derived : public Base {
public:
    void whoami() {
        std::cout << "I am Derived\n";
    }
};
Base* object;

int main() {
    object = new Derived; 
    object->whoami(); 
    Base baseObject;
    object = &baseObject;// this is how you change.
    object->whoami();
    return 0;
}

output:

I am Derived                                                                                                                     
I am Base