Question

Assume a class named Dollars exists. Write the headers for member functions that overload the prefix and postfix + + operators for that class.

Short answer

Question: Provide the headers for the member functions that overload the prefix and postfix ++ operators for a class named Dollars. Answer: ```cpp Dollars& operator++(); // Header for Prefix ++ Operator Dollars operator++(int); // Header for Postfix ++ Operator ```

Step-by-step solution

Understanding the Prefix and Postfix Operators

Prefix operator (++x) increments the value of x and then returns it, while postfix operator (x++) increments the value of x but returns the value before incrementing. We will need to create distinct member functions for both forms of the operator.

Header for Prefix ++ Operator Overloading Function

To create a header for a member function that overloads the prefix ++ operator, define a function with the 'operator++' name and no arguments. Return a reference to the class object (Dollars&), as the result should be an increment of the original object. ```cpp Dollars& operator++(); ```

Header for Postfix ++ Operator Overloading Function

To create a header for a member function that overloads the postfix ++ operator, define a function with the 'operator++' name and one integer argument. The integer argument is not used directly; it's just to differentiate between the prefix and postfix versions of the operator. Return an object of the class (Dollars), as the result should be a temporary class object holding the value before incrementing it. ```cpp Dollars operator++(int); ``` Our result is the headers of the member functions that overload the prefix and postfix ++ operators for the Dollars class: ```cpp Dollars& operator++(); // Header for Prefix ++ Operator Dollars operator++(int); // Header for Postfix ++ Operator ```