Re: Need some design idea input

This may seem like a really dumb question, but I am having a design
hiccup that I can't seem to get past. It all resides on currently
existing classes that I am trying to inherit from and create children
to. However, this is the problem I can't seem to get around. Here's
the problem:

class Parent1
{
public:

    //constructors, etc...

    virtual void DoThis();
    virtual void DoThat();

private:

    Parent2* pBase;
};

class Parent2
{
public:

   //constructors, etc...

   virtual void ParseThis();
   virtual void ParseThat();
};

Although, the classes I have are more complicated than this.

Let's say I want to create a child class from Parent2 that add more
methods and may or may not re-define ParseThis/ParseThat. What I
really need are new methods. I then need to create a type of this
child that has these new methods. However, I can't just store it in
pBase because then I can't access the new methods. The only thing I
can think of that is possible is to create a new Parent1 object that
has a new data member for the parent2 child, but then that leaves a
dangling pBase that I don't want to have to worry about. Not only
that, but if DoThis() and DoThat() call methods from pBase, I need to
redefine EVERY method in Parent1 that accesses this pointer and re-do
all the code using a new variable name. This may seem like a really
elementary problem (even though I can't remember ever having to conquer
something like this before...), and I'm sure there must be some better
way of doing this. I was thinking of templates somehow, but I can't
see how that would fix the problem...

Any help or pointers on some design ideas would be greatly appreciated!

--Chris