Define a default constructor that initializes the fields author (string), year (integer), and title (string) with the default values "Void", -1, and "Void", respectively.
Ex: If the input is Luna 2011 Daisy, then the output is:
Default values:
Author: Void, Year: -1, Title: Void
After mutator methods:
Author: Luna, Year: 2011, Title: Daisy
Note: The class's print() method is called before and after the input is passed to the setters.