中国DOS联盟

@echo off&setlocal

for /f %%a in (1.txt) do if not defined pp (set/p=%%a <nul&set pp=1) else (set/p=%%a;<nul&set "pp=")

@echo off  

setlocal enabledelayedexpansion

set l=1

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

    set /a m=!l!%%2

    if !m!==1 set n= 

    if !m!==0 set n=;

    set /p=%%i!n!<nul

    set /a l+=1

)

echo,

pause