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This code demonstrates the order of constructors and destructors invocation
when member variable of a derived class is defined. The invocation order
follows the rule:

1) with simple or multiple inheritance constructors are invoked in top-down
order, from constructor of the most base class to constructor of derived class
for which variable is defined;

2) destructors, for the same classes, are invoked in opposite down-top order,
from destructor of derived class for which class variable is defined to most
base class destructor invocation;

This sample, for simplicity, takes 2 classes: CBase and CDerived, publicly
derived from CBase;