tmplinshi

@echo off
setlocal enabledelayedexpansion
for /f "delims==" %%i in (' "set # 2>nul" ') do set %%i=
for /f "tokens=4 delims==" %%i in (a.txt) do (
    set n=%%i
    set #!n:~0,4!=#
)
(for /f "delims=#=" %%i in (' set # ') do echo %%i) >b.txt
复制代码

tmplinshi

@echo off
setlocal enabledelayedexpansion
for /f "delims==" %%i in (' "set # 2>nul" ') do set %%i=
for /f "tokens=*" %%i in (a.txt) do (
    set str=%%i
    set str=!str:* ip=!
    set #!str:~1,4!=#
)
(for /f "delims=#=" %%i in (' set # ') do echo %%i) >b.txt
复制代码

tmplinshi

2 楼的代码我改过几次。你重新复制下 5 楼的代码试试。