Re: vb6 style "implements interface"

From:

Triple-DES <DenPlettfrie@gmail.com>

Newsgroups:

comp.lang.c++

Date:

Wed, 27 Feb 2008 05:24:32 -0800 (PST)

Message-ID:

<885bbfe8-ecf6-4ac3-ab69-0d31f27edae7@k2g2000hse.googlegroups.com>

On 27 Feb, 13:46, mick.mcma...@gmail.com wrote:

Hi, i need some help, i'm new-ish to c++ but was an experienced VB6
programmer.

I am trying to do something in c++ along the lines of something i did
a couple of years ago in vb.

Basically, i have loads classes, and want to store them in some sort
of array/container and enumerate through them and call a couple of
methods. I don't need to know which one i'm calling.

In VB i use an shell class and with all the methods that i wanted to
call. then created my other classes implementing the shell interface.
I stored them all in a collection and went through them by creating a
class varible of the interface type and then storing the class from
the collection into it and calling the methods.

I've spent a couple of days looking now, and it's either impossible or
i just don't know the teminolgy for how to do it.

Any help much appreciated.

Mick.

Sounds to me like polymorphism achieved through public inheritance.

class I // the "interface class"
{
public:
  virtual void f() const = 0;
  virtual void g() const = 0;
};

class S // a subclass
{
public:
  void f() { }
  void g() { }
};

It shouldn't be too hard to find more info on the subject. Just google
"c++ OOP" or something similar.

DP