说明：   文通过ALTERA公司的quartus II软件，用Verilog HDL语言完成多功能数字钟的设计。主要完成的功能为：计时功能，24小时制计时显示；通过七段数码管动态显示时间；校时设置功能，可分别设置时、分、秒；跑表的启动、停止 、保持显示和清除。
(Through the ALTERA company quartus II software, using Verilog HDL language to complete the design of multi-function digital clock. The main function of the completion are: time function, 24-hour time display through the Seven-Segment LED dynamic display time school settings function, can be set hours, minutes, seconds the stopwatch to start, stop, and maintain display and removal.)