Guess number

guess_number.rb

# an approach to
#   * http://vipprog.net/wiki/exercise.html#d082e883

# tested Ruby 1.9.3

$VERBOSE = true

right = rand 100

loop do
  puts "Can you guess the number that I'm thinking of?"

  case Integer(gets)
  when right
    puts 'Great!'
    break
  when ->answer{answer < right}
    puts 'small'
  when ->answer{answer > right}
    puts 'big'
  end
end