#include <iostream>

class Base {
    virtual void dummy() {
    }
};

class Derived1: public Base {
};

class Derived2: public Base {
};

int main() {
    // objects
    Base base;
    Derived1 derived1;
    Derived2 derived2;

    // pointers
    Base* pbase;
    Derived1* pderived1;

    // pbase points to Derived1 object
    pbase = &derived1; // ok: derived-to-base
    pderived1 = dynamic_cast<Derived1*> (pbase);
    if (pderived1)
        std::cout << "dynamic_cast succ" << std::endl;
    else
        std::cout << "dynamic_cast NOT succ" << std::endl;

    // pbase points to Derived2 object;
    // attempt to dynamic cast to Derived1 object
    pbase = &derived2; // ok: derived-to-base
    pderived1 = dynamic_cast<Derived1*> (pbase);
    if (pderived1)
        std::cout << "dynamic_cast succ" << std::endl;
    else
        std::cout << "dynamic_cast NOT succ" << std::endl;
}