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An
overloaded operator's operands are defined the same as
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arguments
are defined for functions.
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The
arguments represent the operator's operands.
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Unary
operators have a single argument and binary
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operators
have two arguments.
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When
an operator is used, the operands become the actual
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arguments
of the "function call".
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Therefore,
the formal arguments must match the data
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type(s)
expected as operands or a conversion to those types
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must
exist.
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I
recommend that unary operators always be overloaded as
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members,
since the first argument must be an object of a
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class (except....as discussed in class)
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