require "#{Dir.pwd}/Book.rb"
class BookManager
def initialize()
@books = []
end
def addBook(author, title, isbn, pubYear, area, price)
@books.push(Book.new(author, title, isbn, pubYear, area, price))
end
def delBook(isbn)
@books.delete_if { |b| b.isbn == isbn }
end
def modBookAuthor(isbn, newAuthor)
@books.each { |b| b.author = newAuthor if b.isbn == isbn }
end
def modBookTitle(isbn, newTitle)
@books.each { |b| b.title = newTitle if b.isbn == isbn }
end
end