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Junaid2pac

Mon Jun 25, 2007 6:22 pm


Help in deriving a class

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Can someone explain how to derive a class and explain the use for it???

Thank


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wtd

Tue Jun 26, 2007 11:19 am


RE:Help in deriving a class

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The question you should be asking is "what is polymorphism, and why should I care?"


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Junaid2pac

Tue Jun 26, 2007 12:40 pm


Re: Help in deriving a class

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That was actually my next question

So ya...Any guidance will be helpful


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Junaid2pac

Tue Jun 26, 2007 1:01 pm


Re: Help in deriving a class

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K i kinda have a good idea of polymorphism and understand downcasting, but don't understand y u would upcast to the base class


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wtd

Tue Jun 26, 2007 2:09 pm


RE:Help in deriving a class

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An elephant is a mammal, but a mammal is not necessarily an elephant.  

There are things an elephant can do that all mammals cannot, and if you only know you have a mammal, then you can't flex its trunk.