功能:// 这个程序使用SW1（P0.0）、SW2（P0.1）、SW3（P3.6）、SW4（P3.7）作为中断输入，

//并将其定义的数字在数码管上显示出来。



版本:V1.0

注：SW4===P3.7 SW3===P3.6 SW2===P0.1 SW1===P0.0 SW4中,SW4是电路板上的标号,4是人为定义按键对应的键值.

P4.0作数码管的位选择口, P5口作数码管的段选择口

-Function ://This program uses SW1 (P0.0), SW2 (P0.1), SW3 (P3.6), SW4 (P3.7) as an interrupt input,// ​ ​ and define the number on the digital control displayed. Version: V1.0 Note: SW4 === P3.7 SW3 === P3.6 SW2 === P0.1 SW1 === P0.0　SW4 in, SW4 is a circuit board labeling, four man-made Define a push to the corresponding key. P4.0 as digital bits select Port, P5 port for digital tube segment selector mouth