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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