China DOS Union

Hello, expert:
I'll skip the polite talk. I have a question for you and hope to get your answer.
I made a boot disk (USB flash drive), and I want to make a batch file in it. After this batch file runs, a selection menu appears; after choosing the corresponding item, it executes the corresponding program. How should I write it?

Appendix
@echo off
path=%RAMD%:\;a:\;%CDROM%:\
cls
echo 1 dm
echo 2 diskgen
echo 0 quit
echo Please choose
choice/c

IF ERRORLEVEL 0 goto QUIT
IF ERRORLEVEL 1 goto 1
IF ERRORLEVEL 2 goto 2
goto QUIT
================It always gives an error here.
:1
path=a:\DM\
a:\DM\DM.com
goto QUIT

:2
path=a:\diskgen\
a:\diskgen\diskgen.exe
goto QUIT

:QUIT
echo.

Hehe, this is a problem with the IF ERRORLEVEL statement.
You should judge starting from the larger one.
Specifically:
IF ERRORLEVEL 2 goto 2
IF ERRORLEVEL 1 goto 1
IF ERRORLEVEL 0 goto QUIT
......

Or, after selecting the corresponding data, set an environment variable, and then use:
IF %environment variable%==""
to execute the corresponding program.

Thanks

Learn how to ask questions first.

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