日々の破片

_ 3桁の数当て

a = [rand(9) + 1, rand(10), rand(10)]
loop do
  line = gets
  if line =~ /\A(\d)(\d)(\d)\Z/
    b = [$1.to_i, $2.to_i, $3.to_i]
    eats = 0
    bytes = 0
    0.upto(2) do |i|
      if b[i] == a[i]
        eats += 1
      else
        bytes += 1 if b[i] == a[i - 1] || b[i] == a[(i + 1 > 2) ? 0 : i + 1]
      end
    end
    puts "eats:#{eats}, bytes:#{bytes}"
    exit if eats == 3
  else
    puts 'enter 3 digits number'
  end
end