c语言单片机液晶屏电子时钟，显示时分秒、年月日、星期。矩阵按键控制，可修改、添加或删除闹钟、切换秒表。-SCM c language LCD electronic clock, display minutes and seconds, date, day of week. Matrix button control, you can modify, add, or delete an alarm, switch stopwatch.