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

Answer: The headers for overloading the prefix and postfix ++ operators for the Dollars class are: 1. Prefix ++ operator: `Dollars& operator++();` 2. Postfix ++ operator: `Dollars operator++(int);`

Step-by-step solution

Header: Overloading Prefix \(++\) Operator

To overload the prefix \(++\) operator for the Dollars class, we need to define a member function inside the class called operator++. To distinguish prefix and postfix versions, prefix operators do not require any parameters. The header for the prefix operator will be: ```cpp Dollars& operator++(); ``` This means that we are defining a member function that takes no arguments and returns a reference to a Dollars object.

Header: Overloading Postfix \(++\) Operator

To overload the postfix \(++\) operator for the Dollars class, we need to define another member function called operator++ inside the class. For the differentiation between prefix and postfix versions, postfix operators take an int parameter that is not used, but it is there to help the C++ compiler identify the correct version of the function. The header for the postfix operator will be: ```cpp Dollars operator++(int); ``` This means that we are defining a member function that takes an int as input and returns a Dollars object (not a reference).