bat 监视移动磁盘插入，并把盘符设为变量

@echo off&setlocal enabledelayedexpansion
for /f "delims=\" %%i in ('fsutil fsinfo drives^|find /v ""') do (
set var=%%i
set u=!var:~-2!
fsutil fsinfo drivetype !u!|find "可移动" && (echo !u!是盘
))
pause

@echo off&&setlocal enabledelayedexpansion
set line=0
for /f "tokens=*" %%a in (a.txt) do (
set /a line+=1
if !line! equ 2 (
set var=%%a
set realvar=!var:~-2,-1!
echo !realvar!
))
pause>nul

rem 接你的需求写的，你试下看