how to read a .txt file without change character of .txt file , it only change the first and last numeric data of the .txt file

Dear user,i have text file like this text file='005t01.txt'

in this file class=005; trial=01; i enter the class and trial values only so how to open the above text file.

Answer 1

[Azzi Abdelmalek]

class='005'
trial='01'
filename=sprintf('%st%s.txt',class,trial)