#include <iostream>

#include <typeinfo>



class Hond {

public:

	virtual ~Hond() {

	}

	virtual void blaf() const {

		std::cout<<"Blaf."<<std::endl;

	}

// ...

};



class SintBernard: public Hond {

public:

	SintBernard(int w=10): whisky(w) {

	}

	virtual void blaf() const {

		std::cout<<"Woef!"<<std::endl;

	}

	int geefDrank() {

		std::cout<<"Geeft drank."<<std::endl;

		int i(whisky);

		whisky=0;

		return i;

	};

// ...

private:

	int whisky;

};



void geefHulp(Hond& hr) {

	hr.blaf();

	try {

		SintBernard& sbr(dynamic_cast<SintBernard&>(hr));

		std::cout<<sbr.geefDrank()<<" liter."<<std::endl;

	} catch (std::bad_cast) {

		/* doe niets */

	}

}



int main() {

	SintBernard boris;

	geefHulp(boris);

	std::cin.get();

	Hond h;

	geefHulp(h);

	std::cin.get();

	return 0;

}



/*

Output:



Woef!

Geeft drank.

10 liter.



Blaf.



*/