Re: inheritance scope

[Maurizio Loreti]

Gav <gav@cs.york.ac.uk> writes:

> hi,
> 
> could someone tell me why this program (which results in a compilation
> error) shouldn't compile (i.e. is it a gcc thing or is it a strict part of
> c++), and how i can make it compile without having to put C:: before foo()
> in main()?
> 
> essentially i want the foo() from A to be overloaded as i would expect if it
> was actually inserted into C.
> 
> thanks, gav
> 
> #include <iostream>
> class A
> {  public: void foo() { std::cerr << "A::foo(int)" << std::endl; }
> };
> class C : public A
> {  public: void foo(int) { std::cerr << "C::foo(int)" << std::endl; }
> } c;
> int main()
> {  c.foo();
>    return 0;
> }
> 

ah, since we are here...  class from which you derive, like A, should
have a virtual destructor declared.  and make A:foo() virtual, too.
good programming habits should be used also in toy snippets (from
kernighan & pike, iirc :-)

-- 
Maurizio Loreti                         http://www.pd.infn.it/~loreti/mlo.html
Dept. of Physics, Univ. of Padova, Italy              ROT13: ybergv@cq.vasa.vg