#include <iostream>
#include <typeinfo>
using namespace std;

class A {
    public:
        virtual void fx() {
            cout << "A::fx" << endl;
        }
};

class B: public A {
    public:
        void fx() {
            cout << "B::fx" << endl;
        }
};

class C: public A {
    public:
        void fx () {
            cout << "C::fx" << endl;
        }
};

void f(A* p, A& r) {
    if ((bool)(B& pr = dynamic_cast <B&> (r))) {
        cout << "using of pp" << endl;
    } else {
        cout << "NULL" << endl;
    }
            cout << "STILL HERE" << endl;
    B* pp = dynamic_cast <B*> (p);
}

void g() {
    try {
        cout << "f(new B, *new B) - correct using" << endl;
        f(new B, *new B);
        cout << "f(new C, *new C) - incorrect using" << endl;
        f(new C, *new C);
        cout << "STILL HERE" << endl;
    }
    catch(bad_cast) {
        cout << "Bad_cast" << endl;
    }
}

int main() {
    g();
    return 0;
}