说明： 这个是基于单片机的,万年历的设计.可以计算出闰年.还可以整点报时,响6秒,自动停止.并且可以手动调整时间 (This is based on single-chip, calendar design. Leap year can be calculated. Can also be the whole point timekeeping, sounding six seconds, automatically stop. And can manually adjust the time)
