[文本处理] BAT怎么批量删除文本指定行冒号后的内容

@Echo Off&SetLocal EnableDelayedExpansion
Set "Value=1"		//定义一个递增的变量
Set "Line=4"		//定义要处理的行数
For /F "tokens=1,* delims=:" %%A In (1.txt) Do (
	if !Value! Equ %Line% (Echo %%A)Else (Echo %%A:%%B)
	Set /A Value+=1
)
Pause>Nul
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@echo off
for /f "delims=" %%a in ('dir /a-d /b *.txt') do (
  (for /f "usebackq delims=" %%b in ("%%a") do (
    set/a n+=1&set str=%%b
    setlocal enabledelayedexpansion
    if !n! neq 4 (echo,!str!
    ) else (
      for %%c in (":!str:*:=!") do echo,!str:%%~c=!
    )
    endlocal
  ))>$
  move $ "%%a"&set "n="
)
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@echo off
For /r %%i in (*.txt) do (sed -i '4 s/:.*//' "%%~fi")
pause
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