此文件是基于89c52单片机的温度时钟c程序。使用到温度传感器ds18b20和时钟芯片ds1302。时间可调，闹铃时唱歌。-This document is based on the temperature of 89c52 microcontroller clock c program. Use to the temperature sensor ds18b20 and clock chip ds1302. The adjustable alarm when singing.