说明：  本程序基于51单片机实现了实现电流、电压测量和功率的计算，并通过按键设置报警值，过压过流声光报警功能。
(The program based on 51 single-chip to achieve the realization of current, voltage measurement and power calculation, and through the key to set the alarm value, over-voltage over-current sound and light alarm.)