How to get the child class in inheritance?

hi,
if I have a store for renting videos .. and I have Video class (parent) and two (child) classes DVD and Cassete which they are extend the video class.
And the user wants to rent a DVD which is the child, how do I do that? can I write just getDVD() as simple as that or maybe I need to use a keyword like "getinstance of DVD " or something I don't know how to do this.
class Video have attributes like title, date of production and director.
I'm not good in inheritance help please.
thanks

georgemc wrote:
DrLaszloJamf wrote:
Post a SSCCE: http://mindprod.com/jgloss/sscce.html
You're not the boss of me ;-)Actually, I haven't stopped to count, but most of the time the poster never bothers to write a sample program. If fact, if I weren't such a softie, I would make that an absolute requirement for any further help. Too often, you are just shooting in the dark and 50 replies later the question is still vague.

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Edited by: user9530489 on Sep 14, 2011 1:40 PM

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