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@echo off
setlocal enabledelayedexpansion
for /f "delims=" %%a in ('type 1.txt') do (
   set "str=%%a"&set "n=0"
   call :count
)
echo.&pause&exit
:count
set "var=!str:~%n%,1!"
set /a "n+=1"
if not "!str:~%n%,1!"=="" (goto :count)
set /a "m=%n%/2"
set /a "mm=40-%m%"
for /l %%c in (1 1 %mm%) do (call set "kong=%%kong%% ")
echo %kong%%str%
set "kong="
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哈哈,看了版主的代码终于知道findstr /o的用法了,收获不小啊,非常感谢!!!

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for /f "tokens=1,2* delims=: " %%i in ('findstr /n /o .* 2.txt') do (
...
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好像delims=:就行了吧,空格没有必要吧.