说明：  红外遥控器是由发射部分和接收部分组成的，它的基本功能是在发射部分按一个键，在接收部的数码管上显示对应的键（0~9）。
(Infrared remote control is part of the launching and receiving components, and its basic function is to launch some of the press of a button, the Digital Department in the receiving tube to show the corresponding keys (0 ~ 9).)