批处理：变量截取 和 返回值赋值

读取 (reg query "HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced" /v HideFileExt 的返回值) 判断最后一个字符 是数字 1 or 0

---------------------------------这是他的返回值

HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced
HideFileExt REG_DWORD 0x1

@echo off
setlocal enabledelayedexpansion
for /f "skip=1 tokens=3 delims= " %%i in ('reg query "HKCU\Software\Microsoft\Windows\CurrentVersion\Explorer\Advanced" /v HideFileExt') do (
set bian=%%i
set bian=!bian:~-1,1!

)