小编bon*_*316的帖子

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

def to_s
  #"ISBN: #{@isbn}, price: #{@price}"
end

b1 = BookInStock.new("isbn1", 3)
puts b1
b2 = BookInStock.new("isbn2", 3.14)
puts b2
b3 = BookInStock.new("isbn3", 5.67)
puts b3

def to_s不能做,我可以做以下吗？

b1 = BookInStock.new("isbn1", 3)
puts "#{isbn}, #{price}"

作为回应我感到空白.