🚀 go-pugleaf

The thing is that the assignment I am working with demands that I have a
base class A with two subclasses (B and C) and I need to make ONE list with
both B and C objects. A should be an abstract class. So I need to create an
A pointer which sometimes points on B objects and sometimes on C objects.
And on top of that I need an operator which can add two B objects. If I only
put the operator in class B it wont work if the pointers I try to add have
static type A and dynamic type B.

// Christopher
"Josh Sebastian" <curien@cox.net> skrev i meddelandet
news:rg49eusfujq9l0nq0m5dimtbenu36m0lor@4ax.com...
> On Thu, 16 May 2002 21:17:53 GMT, "Christopher Deli"
> <christopher@delinfo.com> wrote:
>
> >Hello!
> >
> >I have a problem which I'd need some help with, please.
> >If I have one class A which is inherited by another class B i.e. class B
:
> >public class A and I would like to make a virtual operator+ in both class
A
> >and B so I could do the following:
> >A *a, *b, *c
> >a = new B(...)
> >b = new B(...)
> >c = new B(...)
> >*c = *a + *b
> >So I make a pointer of type A which points on an objekt of type B. For
that
> >I'd need a virtual operator+ but I have no idea how to make it. Please
help!
> >The source code of a program which has the similar situation would be
> >perfekt! Thanks!
>
> If you did this, then *a + *b could mean something (very) different
> from *b + *a. That's not a good idea, generally. Perhaps you shouldn't
> use an overloaded operator, in this circumstance.
>
> Josh