Merge 3 text files line by line using batch file. The lines contains specials char. and spaces

Question

Hello i want to merge 3 text files line by line using batch file. The lines contains specials char. and spaces. if file has only one line the code below works but if we have mu

Answer 1

I just copied the answer from this site and extended it to 3 files. I can't provide a more precise solution without further details...

@echo off
setlocal EnableDelayedExpansion
rem First file is read with FOR /F command
rem Second file is read via standard handle 3
rem Third file is read via standard handle 4
3< b.txt 4< c.txt (for /F "delims=" %%a in (a.txt) do (
   rem Read next line from b.txt
   set /P lineB=<&3
   rem Read next line from c.txt
   set /P lineC=<&4
   rem Echo lines of three files
   echo %%a,!lineB!,!lineC!
))