.net工具类分享一个简单的随机分红包的实现方式_.net

.net工具类分享一个简单的随机分红包的实现方式

废话不多说，直接上代码

    /// <summary>
    /// 分红包
    /// </summary>
    public class randommoney
    {
        public randommoney(double totalmoney, int totalcount)
        {
            remainmoney = totalmoney;
            remaincount = totalcount;
        }
        /// <summary>
        /// 剩下的金额
        /// </summary>
        private double remainmoney { get; set; }
        /// <summary>
        /// 剩下的次数
        /// </summary>
        private double remaincount { get; set; }

        private random r = new random();
        /// <summary>
        /// 获取当次红包的金额
        /// </summary>
        /// <returns></returns>
        public double getrandommoney()
        {
            if (remaincount < 1)
                throw new exception("红包已经抢完了");

            if (remaincount == 1)//最后一次
            {
                remaincount--;
                return (double)math.round(remainmoney * 100) / 100;
            }
            double min = 0.01;
            double max = remainmoney / remaincount * 2;
            double money = r.nextdouble() * max;//随机收取本次金额
            money = money <= min ? 0.01 : money;//判断最小值
            money = math.floor(money * 100) / 100;
            remaincount--;//红包个数递减
            remainmoney = remainmoney - money;//计算剩余金额
            return money;//返回本次领取金额
        }
    }

下面写个demo测试一下。

    class program
    {
        static void main(string[] args)
        {
            double totalmoney = 200;
            int totalcount = 10;
            randommoney random = new randommoney(totalmoney, totalcount);
            for (int i = 0; i < totalcount; i++)
            {
                console.writeline($"第{i + 1}个红包:{random.getrandommoney()}元");
            }
            console.readkey();
        }
    }

上面的案例是一个200块钱的红包分10份，打印结果如下