static void ShowAlarm(object sender, ClockArgs now) //设置每过一分钟闹钟触发一次
 {
     if (now.Second == 0)
     {
         Console.WriteLine($"Alarm! DingRing! DingRing! DingRing! DingRing! DingRing!");
     }
 }
        public void TikTok()
        {
            this.second++;   //时间前进1s
            if (this.second >= 60)
            {
                this.second = this.second % 60;
                this.minute++;
                if (this.minute >= 60)
                {
                    this.minute = this.minute % 60;
                    this.hour++;
                    if (this.hour >= 24)
                    {
                        this.hour = this.hour % 24;
                    }
                }
            }
            ClockArgs args = new ClockArgs()
            {
                Hour = this.hour, Minute = this.minute, Second = this.second
            };

            Tick(this, args);
            Alarm(this, args);
        }
 //事件处理方法
 static void ShowTick(object sender, ClockArgs now)
 {
     Console.WriteLine($"TikTok! Time is {now.Hour}:{now.Minute}:{now.Second}");
 }