This is a c project. In this project, with the use of HashLists, an imitation of a database is being created. After that, a menu appears in the user screen, and the user enter their choice. They can create an appointment by adding the name, one of the 3 provided services and the amount of money the customer has paid, they could also search for a…

An inverted index is an index data structure storing a mapping from content, such as words or numbers, to its locations in a database file, or in a document or a set of documents. The purpose of an inverted index is to allow fast full text searches, at a cost of increased processing when a document is added to the database.