Eugene Wee wrote:
Hi,
On Thu, Oct 22, 2009 at 12:08 PM, Ireneusz Szpilewski <irek@szpilewski.opole.pl> wrote:
What if MyHeart has SingMySong() method while Heart does not? How can I access it?
Since we are on the topic of RTTI, you could just use say, dynamic_cast to convert the Heart* to a MyHeart* and thus call SingMySong(). On the other hand, maybe Heart should have such a virtual function instead, if it is supposed to be used polymorphically.
But we were to do a transplant in C++. I'll try my best, I set up my classes: class MyHeart: public rtti_base, // can do dynamic_cast public Heart, // it is human heart public MySongSinger // it can SingMySong() { // }; class Me: public rtti_base, // can do dynamic_cast public Human // I am a Human, hospital can do Human->SwapHearts(Heart* newheart); { //... rtti_base* heart; // initialized to new MyHeart }; I am ready and waiting in the hospital for a dead person heart. BANG!!! Fortunately (for me) there was a car accident and we have 2 bodies: Joe dead_joe; AlienHumanoid dead_alien; What to do next? Ireneusz Szpilewski