键盘扫描，并用数码管显示出来。有8个按键，没按下一个键表示一种数据

tvarThere 5 files in this directory: lumc.txt lumu.txt tar.m thr_est.m het_test.m readme.txt Make sure they are in the same directory. Set the working place of Matlab as this directory and run tar.m. When the process is finished,