545810831

我来试下
@echo off
setlocal enabledelayedexpansion
::假如每行字符不超过100
set m=100
:sta
set /a m=!m!-1
for /f "delims=" %%i in (1.txt) do (
set a=%%i
for /l %%a in (0 1 100) do (
if not "!a:~%%a,1!"=="" set  b=%%a
)
if !m! equ !b!  if not "!a:~%m%,1!"=="" echo !a!
)
if !m! gtr 0 goto sta
pause

545810831

@echo off
setlocal enabledelayedexpansion
::假如每行字符不超过100
set m=100
:sta
set /a m=!m!-1
for /f "delims=" %%i in (1.txt) do (
set a=%%i
for /l %%a in (0 1 100) do (
if not "!a:~%%a,1!"=="" set  b=%%a
)
if !m! equ !b!  if not "!a:~%m%,1!"=="" echo !a!
)
if !m! gtr 0 goto sta
pause
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