// Pantea Aria


// Struct and Enum


// Imagine you are designing a program for a small library system.  
// Each book has:  
//   - an ID number (int)  
//   - a price (double)  
//   - a category (enum book_type) that can be 
//           FICTION, NONFICTION, or TEXTBOOK  
//
// 0 for FICTION  
// 1 for NONFICTION  
// 2 for TEXTBOOK  
//
// Task:  
// Define an enum and a struct to represent a book.  
// Then, create a book with ID 101, price 59.99, and category TEXTBOOK.  
// Finally, print the book’s details.