初学者写的初级程序，用PIC单片机制作的LED数字钟，并设置有时间控制，如报警、对电器设备实行定时开关机。注译非常详细，供初学者学习参考。该程序已用于实际。-Primary program for beginners wrote, produced using PIC microcontroller LED digital clock, and set the time control, such as the police, to implement a timer switch electr