ruby easyLottery.rb [大当たり確率(1/n)] [大当たり回数] example: $ ruby easyLottery.rb 300 10 (1/300の大当たり確率を10回当てるとき)

easyLottery.rb

def main()
  prob = ARGV[0].to_i
  hit = ARGV[1].to_i
  random = Random.new

  begin
    if !prob || prob == 0 || !hit || hit == 0 then
      raise "bad argument..."
    end

    # exec
    (1..hit).each do
      count = 0
      graph = ""
      loop do
        count = count + 1
        lot = random.rand(1..prob).to_i
        if lot == 1 then
          break
        end
      end
      division = count.div(100) + 1
      (1..division).each do
        graph << "■"
      end
      display_count = sprintf("% 5d", count)
      puts "#{display_count}: #{graph}"
    end
  rescue => e
    puts e.message
  end
end

main()