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| • |
Because
derived classes inherit the members of the base
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classes,
one class' design can be based on existing
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members
from another class.
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Think
of this as using building blocks.
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Instead
of starting from scratch with each class that we
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design,
we can extend one class from another, reusing an
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existing
class and reducing the need to reinvent.
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New
member functions can be added without modifying
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the
base class itself. And, a derived
class can change the
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inherited
base class client interface by specifying data
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members
and member functions of the same name, hiding
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those
inherited from the direct or indirect base classes.
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