中国DOS联盟

@echo off
for /f "delims=" %%i in (a.txt) do set /a m+=1&set n=0&set str=%%i&call :lp %%str%%
pause>nul&goto :eof
:lp
set /a n+=1
set str=%str:~1%
if not "%str%"=="" goto lp
echo 第%m%行为%n%个字符 

@echo off
for /f "delims=" %%i in (a.txt) do set /a m+=1&set n=0&set str=%%i&call :lp %%str%%
pause>nul&goto :eof
:lp
set /a n+=1
set str=%str:~1%
if not "%str%"=="" goto lp
if %n% equ 80 ( echo 第%m%行是80个字符) else (echo 第%m%行不是80个字符)

@echo off
for /f "delims=" %%i in (a.txt) do call :lp "%%i"
pause>nul&goto :eof
:lp
set str=%~1
set /a m+=1
if not "%str:~79,1%"=="" (
  if "%str:~80,1%"=="" echo 第%m%行是80个字符
) else (echo 第%m%行不是80个字符)

@echo off
for /f "delims=" %%i in (a.txt) do call :lp "%%i"
pause>nul
exit

:lp
set len=
set /a m+=1
for /f "skip=1 delims=:" %%n in ('^(echo %1^&echo.^)^|findstr /o ".*"') do set/a len=%%n-5
echo 第 %m% 行 %len% 个字符
goto :eof

@echo off
for /l %%a in (1 1 80) do call set n=.%%n%%
for /f "delims=:" %%a in ('findstr /xn %n% a.txt') do echo 第 %%a 行是 80 个字节。
pause

@echo off&setlocal enabledelayedexpansion
::code 26933062 2008-04-20
set "var=^(type a.txt^&echo.^&echo.^)^|findstr /o .*"
for /f "tokens=1* delims=:" %%a in ('%var%') do (
   if defined n (
      set /a m=%%a-2-n
      set _!h!=第 !h! 行    有 !m! 字节
   )
   set /a n=%%a,h+=1
)
set /a h-=1,m-=1
set _!h!=第 !h! 行    有 !m! 字节
for /l %%a in (1 1 !h!) do echo !_%%a!
pause