Simple Grading System in Batch File is as easy like you are doing it in C ++. But the difference is you don't need any kind of compiler to download and install. You can compile and run a batch file program using a CMD. You can see a batch program used as a calling program in most computer systems or program. Learning batch programming as most of the basic principle of programming.
Grading System in Batch File (Source Codes)
If you can't see the entire codes properly just highlight it all and copy it to your favorite text editor. Also you can even set your browser in view "Desktop Site" in mobile browsers.