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| • |
Binary
operators have either a single argument if they are
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overloaded
as members (the first operand corresponds to
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the
implicit this pointer and is therefore an object of the
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class
in which it is defined)
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Or,
binary operators have two operands if they are
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overloaded
as non-members
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(where
there is no implicit first operand)
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In
this latter case, it is typical to declare the operators as
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friends
of the class(es) they apply to -- so that they can
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have
access privileges to the private/protected data
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members
without going thru the public client interface.
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