OPENFILE Book.txt FOR READ
DECLARE book_list : ARRAY[1:x] OF STRING

FOR line in book_file
	entries ← line.split
	WRITEFILE Book.txt, entries

CLOSEFILE Book.txt

REPEAT
	Book_found ← False
	Choice ← INPUT

if choice = 1
	THEN
	Book_name ← INPUT
	Book_author ← INPUT
	Book ← book_name, book_author
	WRITEFILE Book.txt, book
	OUTPUT Book_list

if choice = 2
	THEN
	Author ← INPUT
	FOR current_book in book_list
		IF current_book[1] = author
			OUTPUT Book title:,current_book[0]
			Book_found ← True
		IF NOT book_found
			OUTPUT No book found by the author.

if choice = 3
	THEN
	OUTPUT Ending Interface
	END

if choice = 4
	THEN
FOR Book in book_list
	Book_pub_date ← INPUT
	WRITEFILE Book, book_pub_date
	OUTPUT book_list

OPENFILE Book.txt FOR WRITE
FOR Book in Book_list
WRITEFILE Book_file book[0] + , + book[1]
LENGTH Book = 3
WRITEFILE Book_file(, + Book[2])

CLOSEFILE Book.txt