电子钟实现调时秒表闹钟功能通过4个按键进行功能划分，使用2个不同的定时器一个用来进行时钟和秒表的设置一个用来进行闹钟的声音提醒功能-Alarm Clock stopwatch function through four key functional division of tune, the use of two different timers used for clock and a stopwatch used to set a reminder alarm sounds