for /f "tokens=4 delims=. " %%a in (ip.txt) do set ip%%a=.
for /l %%a in (1 1 255) do if not defined ip%%a echo 不存在 %%a
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@echo off
for /f "tokens=4 delims=." %%a in (a.txt) do set _%%a=%%a
(for /l %%a in (1 1 255) do if not defined _%%a echo 10.1.17.%%a)>B.txt
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@echo off&setlocal ENABLEDELAYEDEXPANSION
for /l %%i in (1 1 255) do (findstr "^10\.1\.17\.%%i$" a.txt >nul||echo 10.1.17.%%i)
pause
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@echo off
for /l %%i in (1 1 255) do echo 10.1.17.%%i>>c.txt
findstr /v /G:b.txt c.txt>result.txt
del c.txt/q
pause
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