已完成功能

1.完成秒／分／时的依次显示并正确计数；

2.秒／分／时各段个位满10正确进位，秒／分能做到满60向前进位；

3.定时闹钟：实现整点报时，又扬声器发出报时声音；

4.时间设置，也就是手动调时功能：当认为时钟不准确时，可以分别对分／时钟进行调整；

-Has completed the function 1. Completed second/min/when followed by display and count right　2. Second/min/h over the paragraphs个10-bit binary right, second/minute can do to advance the age of 60-bit　3. Timer alarm clock : realize the whole point timekeeping and timekeeping voices from loudspeakers　4. time settings, which is manually adjusted when the function: When the clock does not consider accurate, they can separately on the sub/clock adjustment