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Hi,

As I see the declaration :
Bid getNextBid(int trdId, int qty, int price, char type);
differs from definition :
Bid Trader::getNextBid() { ...
This is probably the reason.
I would change...

Hello,
Thank you for the good answers,I will probably use the boost library

MIchael.

Hello all,

I am planning a cross platform application,and going to use Qt library for
GUI.Also going to separate the UI from the actual code.So that in
the future I could change the GUI...

I would like to show the simplified case which describes my goal.In general there is
some system with feedback, and the difference between data collecting and the feedback
is just in parameters....

- shure, i just liked their way to "defence" themselves from unwanted deeper inheritance :-)

Gcdef,Amleto, thanks for your advise,
so after some googling I found a solution that seems nice - using private inheritance
and pure virtual functions at the base class.
...

Hello all,

I am looking for elegant way to call children's method from parent class,
is at possible at all?

Thanks