Console.WriteLine("请输入闹钟的日期时间");            DateTime s = Convert.ToDateTime(Console.ReadLine());            while (true)            {                Console.Clear();                Console.WriteLine(DateTime.Now.ToString("yyyy年MM月dd日 hh时mm分ss秒"));                if (s.ToString("yyyyMMddhhmmss").Equals(DateTime.Now.ToString("yyyyMMddhhmmss")))                {                    Console.WriteLine("时间到了！\a\a\a\a\a\a\a\a\a\a\a...");                    Console.WriteLine("是否要关闭闹钟，关闭请输入Y，否则请按N");                    string c = Console.ReadLine();                    if (c.ToUpper() == "Y")                    {                        break;                    }                    else if (c.ToUpper() == "N")                    {                        s = s.AddSeconds(59);     //59秒后再响                    }                    else                    {                        Console.WriteLine("输入错误！");                        break;                    }                }                Thread.Sleep(1000);            }