[Promise don't come easy]
I should have known all along.
There was something wrong.
I just never read between the lines.
Then I woke up one day and found you on your way.
Leaving nothing but my heart behind.
What can I do to make it up to you.
Promises don't come easy.
But tell me if there's a way to bring you back home to stay.
Well I'd promises anything to you.
I've been walkin' around with my head hanging down.
Wondrin' what I'm gonna do.
'Cause when you walked out that door.
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                          [Promise don't come easy]
                        I should have known all along.
                          There was something wrong.
                     I just never read between the lines.
              Then I woke up one day and found you on your way.
                     Leaving nothing but my heart behind.
                     What can I do to make it up to you.
                          Promises don't come easy.
         But tell me if there's a way to bring you back home to stay.
                      Well I'd promises anything to you.
             I've been walkin' around with my head hanging down.
                         Wondrin' what I'm gonna do.
                    'Cause when you walked out that door.
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sed -e :a -e "s/^.\{1,77\}$/ & /;ta" a.txt
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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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@echo off
copy /y 1.txt 2.txt>nul
echo.>>2.txt&echo end>>2.txt
for /f "tokens=1,2* delims=: " %%i in ('findstr /n /o .* 2.txt') do (
    set "_%%i=%%j"&set ".%%i=%%k"
　　if %%i geq 2 call :lp %%i
)
del /q 2.txt&pause>nul&goto :eof
:lp
set /a n=%1-1
set /a num=_%1-_%n%-2
set /a kl=(80-num)/2
for /l %%i in (1,1,%kl%) do set /p= <NUL
call,set /p=%%.%n%%%<NUL&ECHO.
 
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for /f "tokens=1,2* delims=: " %%i in ('findstr /n /o .* 2.txt') do (
...
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@echo off
for /l %%i in (1,1,80) do call,set "kong=%%kong%% "
for /f "delims=" %%i in (1.txt) do (
     set "str=%%i%kong%"
     call,set "str=%%str:~,80%%"
     call,set "str=%%str:%%i=%%"
     call,set "str=%%str:  = %%"
     call,echo %%str%%%%i
)
pause>nul
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@echo off
for /f "delims=" %%i in (a.txt) do (
    set v=%%i
    set str=%%i
    set n=0
    call :lp
)
pause&exit/b
:lp
    set /a n+=1
    set v=%v:~1%
    if not "%v%"=="" (goto lp) else (goto next)
:next
    set /a m=(77-%n%)/2
    for /l %%j in (1 1 %m%) do set /p= <nul
    echo %str%
goto :eof
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@echo off&setlocal enabledelayedexpansion
for /f "delims=" %%a in (a.txt) do (set "str=%%a"
      for /l %%b in (1,1,40) do (if "!str:~78!" equ "" set "str= !str! ")
      echo,!str:~,79!
)
pause
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"""
python文本内容居中显示.py
http://bbs.bathome.net/thread-1289-1-1.html
2016年5月2日 04:51:33 codegay
"""

with open("a.txt") as f:
    txt=[r.strip() for r in f]
    w=max([len(r) for r in txt])+10
    [print(r.center(w)) for r in txt]
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@echo off
setlocal enabledelayedexpansion
set "kong=    "
for /f "delims=" %%a in (a.txt) do (
	setlocal
	for %%b in (%%a) do set /a n+=1
	set /a num=80-n*4
	set /a num=num/8
	for /l %%c in (1,1,!num!) do set/p=%kong%<nul
	set/p=%%a<nul
	for /l %%c in (1,1,!num!) do set/p=%kong%<nul
	echo;
	endlocal	
)
pause
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@echo off
setlocal enabledelayedexpansion
for /l %%i in (1,1,40) do set "space=!space! "
for /f "tokens=1* delims=:" %%a in ('findstr /o .* 1.txt') do (
    if defined num2 (
        set /a "num1=(%%a-!num2!)/2"
        call echo,%%str:~!num1!%%
    )
    set num2=%%a
    set str=!space!%%b
)
pause
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