I've class C1, C2 and C3. C1 should be abstract, and all functions
should be defined like normal, no-virtual functions. It don't have to
have constructor.
C2 is C1 with constructor.
C3 is C2 with constructor(both take long time and one exclude second)
and additional functions and members.
Haw do it, when I've not pure-virtual function?
I use g++.
Regards.
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