Question

Create a Ruby class Book1. Each book is characterized by the instance variables authnr rf t class . For this class create the initializer and the method show1 that displays the instance variables of the Bookl. class Create the class Book2 that inherits properties from the class Bookl and ad variables publisher and price. Write the following Book2 methods e read2 that prompts the user and reads from the keyboard all data for Book e show2 that displays all instance variables of the class Book2 Write a main displays all of them using show2. ds a new instance d thern program that reads from the keyboard an array of 3 books (objects of Book),

Answer 1

class Book1

#initialize method is like a constructor to initialize object variables

     def initialize(title,author)

                @title=title

                @author=author

     end

# declaration of show1 method to display object variable's values

     def show1

               puts "Book title="+@title

               puts "Author name="+@author

     end

end

class Book2 < Book1
  
     def initialize

    puts "Hello derived class Book2"

    end
   

# read2 method to read input from user using gets method

    def read2
  
    puts "Enter publisher"
  
    @publisher=gets
  
    puts "Enter price"
  
    @price=gets
  

    end

   def show2

               puts "Publisher Name="+@publisher

               puts "Price="+@price

     end

end

# Super class and sub class object creation

b1=Book1.new("Harry Potter","J.k.Rowling")

b1.show1

b2=Book2.new

b2.read2

b2.show2