Standard Function Objects

Other than the function objects that we considered in Some Predefined Function Objects, STL provides a number of different predefined function objects. Since they're fairly intuitive to use (as you've seen in Function Objects - in a Nutshell), they do not require much explanation (names like multiplies and divide are self-explanatory).

Name	Description	Unary/binary	Operator
plus	Returns the sum of the two operands passed to it	binary	+
minus	Returns the sum of subtracting the second operand from the first	binary	-
multiplies	Returns the product of the two operands passed to it	binary	*
divides	Returns the result of dividing the second operand from the first	binary	/
modulus	Returns the result of applying the modulus operator to the two operands.	binary	%
negate	Returns the negated value of the operand passed to it	unary	-
equal_to	Returns true if the two parameters are equal	binary	==
not_equal_to	Returns true if the two parameters are not equal	binary	!=
greater	Returns true if the first parameter is greater than the second	binary	>
less	Returns true if the first parameter is less than the second	binary	<
greater_equal	Returns true if the first parameter is greater than or equal to the second	binary	>=
less_equal	Returns true if the first parameter is less than or equal to the second	binary	<=
logical_and	Returns the result of and-ing the two parameters passed to it	binary	&&
logical_or	Returns the result of or-ing the two parameters passed to it	binary	||
logical_not	Returns the result of not-ting the parameter passed in	binary	!