简单抢红包实现

red_package.rb

require 'bigdecimal'

def getRandomMoney(remainSize, remainMoney) 
    if remainSize == 1
      remainSize -= 1
      return remainMoney.floor(2)
    end

    min   = 0.01
    max   = remainMoney / remainSize * 2.0
    money = rand * max
    money = money < min ? 0.01 : money
    money = money.floor(2)
    # remainSize -= 1
    # remainMoney -= money
        
    money
end

n = 10
money = BigDecimal.new(100)

10.times do
  t = getRandomMoney(n, money)
  puts t.to_f
  
  n -= 1
  money -= t
end