I've recently been reading about virtual and over-riding class methods, and wondered what the difference really is, and whether it matters to use either.
I know the virtual functions enable the function to do different things in different classes, but surely you can just over-ride the function and get the same effect?
Dunno if it would be too much to ask for an example of where each would be appropriate, thanks!
There most certainly is a difference.Code:#include <iostream> struct base { virtual void f() const { std::cout << "base::f()" << std::endl; } void g() const { std::cout << "base::g()" << std::endl; } }; struct derived : public base { virtual void f() const { std::cout << "derived::f()" << std::endl; } void g() const { std::cout << "derived::g()" << std::endl; } }; int main() { base foo; derived bar; foo.f(); foo.g(); bar.f(); bar.g(); base* ptr = &bar; ptr->f(); ptr->g(); }
*edit*
And here is a very relevant link: It's legal, but it ain't moral.
Cheers
Last edited by Zach L.; 08-21-2005 at 09:51 AM.
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alright, thanks. Oh and cheers for the link, should minimise the need to post om here asking about inheritance again, hehe
