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Hiding
alternative functions behind a common interface is
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called
polymorphism (a Greek term which means "many
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forms").
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Polymorphism
allows multiple implementations of a
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member
function to be defined, each implementing
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different
behavior.
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Member
function overloading is one form of
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polymorphism.
Member function hiding is another.
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One
of the most powerful forms of polymorphism is
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member
function overriding. With overriding, applications
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can
be independent of derived classes by using only base
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class
member functions to perform operations on derived
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classes.
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