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This
change requires that the client program catch and
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handle
the error and determine how to handle it.
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The
class no longer performs error processing.
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This
approach gives the client program control of how
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errors
are handled and the type of error messages
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provided.
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To
detect when new fails, we use the regular form of new.
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If
new cannot allocate the necessary space, it
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automatically
throws an exception of type bad_alloc. If
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the
index is out of bounds, we throw an exception instead
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of
returning.
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Therefore,
we do not need a dummy integer to return. But,
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we do
need to define a type for the exception that is
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thrown
(bad_index structure).
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