> You will need to implement pruning and grafting correctly if you're
> forced to use references.
Read the fine print, i can rewrite that particular header file.

And you need to implement construction
> properly (no assignment to 'data', use initialisation only).
Not needed now, but I'm not sure what you mean by this.

I changed the node data to be just float. Is there a way i can do it
better?

Thanks for your Victor.

Regards,
Ken