[cs23021] on project 7

[Mikhail Nesterenko]

* The accountant should print the "position" of the number entered not
  the "index". That is, if 5 is entered, the 5th number should be
  printed.

* In the project, you have to override overload insertion in derived
  class. This is not trivial. So instead, you can assume that

  Date has function print() that prints the contents of the object

  This function has to be overridden in BDate class. Your project does
  NOT have now to work with the example program provided in the
  repository.

thanks,
--
Mikhail