中国DOS联盟

@echo off

setlocal enabledelayedexpansion

set RowNum=0

>"b.txt" echo 000~050

for /f "usebackq delims=" %%a in ("a.txt") do (

  set /a RowNum+=1

  >>"b.txt" echo %%a

  set /a mod=RowNum%%50

  if !mod! equ 0 (

    set /a BgnNum=RowNum+1

    set BgnTmp=100!BgnNum!

    set BgnTmp=!BgnTmp:~-3!

    set /a EndNum=RowNum+50

    set EndTmp=100!EndNum!

    set EndTmp=!EndTmp:~-3!

    >>"b.txt" echo !BgnTmp!~!EndTmp!

  )

)

move /y "b.txt" "a.txt"

@echo off&setlocal enabledelayedexpansion

for /f "delims=" %%i in ('type a.txt') do (

     set /a n+=1,m=n+49,v=n%%50

     if !n! equ 1 (

        echo 001~050>a.txt

        ) else (

        if !v! equ 1 echo !n!~!m!>>a.txt

      )

      echo %%i>>a.txt

)

start a.txt