简易温度采集与控制

代码说明：

说明：  蓝桥杯第五届初赛赛题，温度采集与控制，除了基础的数码管显示、继电器和蜂鸣器的控制、LED灯的控制以外，难度增加的部分体现在需要使用矩阵键盘，以及DS18B20的调用。(In the 5th preliminary competition of Blue Bridge Cup, besides the basic digital tube display, the control of relays and buzzers, and the control of LED lights, the increasing difficulty is reflected in the need to use matrix keyboard and the call of DS18B20.)