中国DOS联盟

@echo off & setlocal EnableDelayedExpansion
set file=c:\a.txt
for /f "usebackq" %%a in ("%file%") do (
  set str=000000000%%a
  if not defined . (
    set .= & >"%file%" echo !str:~-10!
  ) else (
    >>"%file%" echo !str:~-10!
  )
)

@echo off
set "var=0000000000"
for /f "delims=" %%a in ('more +10^<%~fs0') do (
  set "str=%%a"
  setlocal enabledelayedexpansion
  set "str=%var%!str!"
  echo !str:~-10!
  endlocal
)
pause&goto :eof
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@echo off&setlocal enabledelayedexpansion
for /f  %%a in ('^more ^<a.txt') do (
set txt=000000000%%a
echo !txt:~-10,10!>>a1.txt
)
del /q a.txt&ren a1.txt a.txt