[文本处理] 求教批处理把文件每几行就输出到一个文本里

@echo off
setlocal EnableDelayedExpansion
cd /d "%~dp0"
set /p var1=要切割的行数:
set /p var2=要生成最大文本数:
set src=1.txt
set linectr=0
set filectr=0

for /f "delims=" %%A in (%src%) do (
  if !linectr! equ 0 (
    set /a filectr+=1
    if !filectr! gtr %var2% goto break
    echo %%A>"txt!filectr!.txt"
  ) else (
    echo %%A>>"txt!filectr!.txt"
  )
  set /a linectr+=1
  if !linectr! geq %var1% set linectr=0
)

:break
endlocal
pause
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