@echo off
rem 假设每行均不超过100个字符
set /a m=1001,n=0,max=每行最多字符数=100
setlocal enabledelayedexpansion
for /f "delims=" %%a in ('type "大文本.txt"') do (
	set "str=%%a"
	set /a h=0
	for /l %%l in (0,1,%max%) do (
		if not "!str:~%%l,1!" equ "" (
			set /a n+=1,h+=1
		)
	)
	if !n! geq 200 (
		set /a m+=1,n=h
	)
	>>小文本!m:~-3!.txt echo %%a
)
endlocal
pause
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