[Foreigner]

Тогда так:

Код:

@echo off
setlocal

for /f "tokens=*" %%i in (1.txt) do call:0 %%i

set "result=%result:/=\%"
echo %result%

goto:eof

:0

if not "%2"=="" (set "p=%~1" && set res="%~1\%3") else (set res="%p%\%1")
if defined result (set result=%result% %res%) else (set result=%res%)