[文本处理] 批处理命令findstr /v /g:的问题的困惑

@echo off
findstr /l /v /g:需要删除内容1.txt "a.txt" >"c.txt"
pause >nul
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findstr /L /v /g:
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@echo off
findstr /v /l /g:b.txt "a.txt"|findstr .
pause
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C:\Users\Administrator\Desktop\test1>type a.txt b.txt test.bat

a.txt


@Echo Off
Title Reg Converter v1.1 & Color 1A
cd %systemroot%\system32
call :IsAdmin

REM ; 由 Total Uninstall 产生
REM ;【窗口位置：“左300”、“上150”】
Reg.exe add "HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\MpsSvc\Parameters\PortKeywords\DHCP" /v "Collection" /t REG_BINARY /d "" /f
Reg.exe add "HKEY_USERS\S-1-5-21-3291519012-2868546545-2290023086-500\Console" /v "WindowPosition" /t REG_DWORD /d "9830700" /f
Exit

:IsAdmin
Reg.exe query "HKU\S-1-5-19\Environment"
If Not %ERRORLEVEL% EQU 0 (
 Cls & Echo You must have administrator rights to continue ...
 Pause & Exit
)
Cls
goto:eof

b.txt


Title Reg Converter v1.1 & Color 1A
cd %systemroot%\system32
call :IsAdmin

REM ; 由 Total Uninstall 产生
REM ;【窗口位置：“左300”、“上150”】

:IsAdmin
Reg.exe query "HKU\S-1-5-19\Environment"
If Not %ERRORLEVEL% EQU 0 (
 Cls & Echo You must have administrator rights to continue ...
 Pause & Exit
)
Cls
goto:eof

test.bat


@echo off
findstr /v /l /g:b.txt "a.txt"|findstr .
pause


C:\Users\Administrator\Desktop\test1>test.bat
@Echo Off
Reg.exe add "HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\MpsSvc\Parameters\PortKeywords\DHCP" /v "Collection" /t REG_BINARY /d "" /f
Reg.exe add "HKEY_USERS\S-1-5-21-3291519012-2868546545-2290023086-500\Console" /v "WindowPosition" /t REG_DWORD /d "9830700" /f
Exit
请按任意键继续. . .
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