See what happens in the following code?

Ruby
1

see what happens in the following code ???

class BookInStock

attr_reader :isbn

attr_accessor :price , :isbn

def initialize(isbn, price)
@isbn = isbn
@price = Float(price)
end

def price_in_cents
Integer(price*100 + 0.5) + @price
end

def price_in_cents=(cents)
puts price
price = cents / 100.0 + price
puts price
p price
@price = price
end
def imp
puts “ISBN = #{isbn}”
end

…

end
book = BookInStock.new(“isbn1”, 33.80)
puts “Price = #{book.price}”
puts “Price in cents = #{book.price_in_cents}”
book.price_in_cents = 1234
puts “Price = #{book.price}”
puts “Price in cents = #{book.price_in_cents}”
book.imp

2

I changed your code a bit.

class BookInStock

attr_reader :isbn

attr_accessor :price , :isbn

def initialize(isbn, price)
@isbn = isbn
@price = Float(price)
end

def price_in_cents
Integer(price*100 + 0.5) + @price
end

def price_in_cents=(cents)
puts price
price = cents.to_f / 100.0 + price.to_f
puts price
p price
@price = price
end
def imp
puts “ISBN = #{isbn}”
end

…

end

book = BookInStock.new(“isbn1”, 33.80)
puts “Price = #{book.price}”
puts “Price in cents = #{book.price_in_cents}”
book.price_in_cents = 1234
puts “Price = #{book.price}”
puts “Price in cents = #{book.price_in_cents}”
book.imp

You had a nil. Either in cents or in price variable.

Also you use a local variable called price and an
accessor method price for @price.

Are you sure that this does not confuse you?

It would confuse me. Whenever I would write code
that is complex for my brain to understand, then
by definition I classify it as wrong and simplify
the code. This is just how my brain works, it is
so lazy that it does not ever want to guess.