>>612
if文の不具合は引用符絡みのようなので
それを削除して書き直しました

@echo off
call :set_arg arg
if not defined arg goto :eof
for %%f in (%arg%) do echo "%%~nxf"
pause & goto :eof

:set_arg
setlocal enabledelayedexpansion
set a=!cmdcmdline!
set /a b=0,n=0
set "s=" & set "c=/" & set "e= " & set "d=""
:x1
if not !a:~%b%^,1!==!c! set /a b+=1 & goto x1
:x2
if !a:~%b%^,1!==!d! set /a n+=1
if !n! equ 3 set /a b+=2 & goto x3
set /a b+=1 & goto x2

下に続く