A function object is
A) an instance of a class that has exactly one member function and no member variables.
B) an object of a class that has any number of member functions, but no member variables.
C) an object of a class that overloads the function call operator ().
D) an object that has a member variable that is a pointer to a function.
E) None of the above

Question

Quizplus · Accepted Answer

A function object is an object of a class that overloads the function call operator (). This allows instances of the class to be called like functions, hence the name "function object." Options A and B are not fully accurate as they do not require the class to overload the function call operator. Option D is not accurate as the function pointer is not a member variable of the object itself. Option E is not accurate as there is a correct answer.

A Function Object Is