模拟温度采集监测系统，该系统底层数据是由随机数发生器产生的20~40之间的随机数，可以有华氏和摄氏两种显示模式，可以设定温度上限，当温度超限时。

-Analog temperature acquisition and monitoring system, which the underlying data is a random number between 20 to 40 by a random number generator, there can be Fahrenheit and Celsius two display modes, you can set the temperature limit, when the temperature gauge.