Chapter 11.8, Problem 11.34CP

Explanation of Solution

Function object:

• When an object of the class overloads the function call operator then it is called as function object.
• Function object is similar to a function and whose parameters can be passed to other functions.
• When an instance of class overloads the function call operator ()then it is is called as “functor” or “function object”.
• Function call operator carries any number of arguments.

Example:

The below code illustrates the function object usage:

//class definition

class ProductFunctor

{

public:

//overload the function operator

int operator()( int a, int b)

{

//return product

return a*b;

}

};

The below illustrates how an object to the function objects are created and used:

//creating object for the function object

ProductFunctor Product1;

//creating function object...