多功能电子钟；本程序在KEIL编译时必须安装有 浮点库文件 C51FPS.LIB 附加功能：指示灯，蜂鸣器，温度传感器，世界节日-Multi-functional electronic bell KEIL compiler of this procedure must be equipped with floating-point library file C51FPS.LIB Additional features: light, buzzer, temperature sensor