a. cannot be used as a base class b. results in read-only objects c. must have a virtual destructor d. none of the above which letter is correct? thanks!

the chicken crosses at midnight..

c or d.

AFAIK there is no rule in the C++ language that says "If Thou Maketh A Class With A Protected Constructor, Thine Destructor Must Be Virtual", but since a class with a protected constructor is most likely an ADT from which you are deriving other useful classes, it is probably a good idea.

Let us know how you did on your test/homework...



Dire Wolf
www.digitalfiends.com

hehe, sure, it''s a 60 item test, anyway pls, i want a sure answer, anyone?

d would be my answer....

Well it''s a crap question. There is no requirement in the C++ language that a class with a protected constructor should have a virtual destructor, but in 99% of cases it is common sense. (off the top of my head, I can''t think of any cases where it isn''t common sense, can anyone else?)

So the correct answer depends on your teacher. If he is

a) a tosser who learnt C++ from ''Teach Yourself C++ in 21 days'' and is giving you questions directly out of the book, then the answer is probably c.

or

b) a tosser who actually knows and understands the syntax, but wants to ask you a trick question. In this case, the answer is d.

I''d put my money on c, even though technically d is the correct answer.

There''s nothing wrong with TYSC++I21D - it just has a bad title.

Once there was a time when all people believed in God and the church ruled. This time is called the Dark Ages.

How about

e) Is used to create Singleton classes.

okey am just gonna answer....awwwwuuhhh shoot! D!