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16. Assuming that properly overloaded the *operator to perform multiplication for a Number class, and that a, b, and c are three members of the Number class, which expression is legal?
a*b
a*b*c
Both (a) and (b)
None of these
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17. When an operator is used alone with a single variable argument, the operator is called
unique
unary
alone
allocated
18. If an operator is normally defined to be only unary, then one
may overload it to be binary
must overload it to be binary
may not overload it to be binary
may not overload it
19. When you overload an operator for use with your classes, you
Must use the overloaded operator for the usual purpose
should use the overloaded operator for the usual purpose
may not use the overloaded operator for the usual purpose
may not overload operators that have a usual purpose
20. When you overload operators, you may change
associativity
precedence
binary operators to unary ones
none of these
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