笔试题--红包算法，给定一个红包总金额和分红包的人数，输出每个人随机抢到的红包数量。

    //最少分得红包数
    private static final double min = 1;
    //最多分得红包数占比
    private static final double percentMax = 0.3;

    public void allocateMoney(double money, int peopleNum) {
        double minMoney = min;
        double maxMoney = percentMax * money;
        int shareMoney = 0;
        double sum = 0;
        for (int i = 0; i < peopleNum; i++) {
            minMoney = minMoney > money - maxMoney * (peopleNum - i - 1) ? minMoney : (money - maxMoney * (peopleNum - i - 1));
            maxMoney = maxMoney < money - minMoney * (peopleNum - i - 1) ? maxMoney : (money - minMoney * (peopleNum - i - 1));
            shareMoney = (int) Math.floor((maxMoney - minMoney) * Math.random() + minMoney);
            money = money - shareMoney;
            sum += shareMoney;
            System.out.println("第" + (i + 1) + "个人抢到:" + shareMoney + "元");
        }
        System.out.println("要分配的红包总额为:" + sum + "元");
    }