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  1. # your code goes here
  2. class Foo
  3. 	attr_accessor :num
  4. 	def initialize
  5. 		@num = 1
  6. 	end
  7. 	def inc
  8. 		puts num.class
  9. 		puts num
  10. 		num = (num + 1)
  11. 	end
  12. end
  13.  
  14. puts Foo.new.inc
Runtime error #stdin #stdout #stderr 0s 6316KB
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stdin
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Standard input is empty
stdout
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Integer
1
stderr
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prog.rb:10:in `inc': undefined method `+' for nil:NilClass (NoMethodError)
	from prog.rb:14:in `<main>'
https://ideone.com/capCor
language:
Ruby (ruby 2.5.5)
created:
4 years ago
visibility:
public

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