cmd - replace specific lines of two files -

alright. have 2 files file1 , file2

file1

line1 helloa hellob line2 

file2

line3 helloc hellod helloe line4 

i want replace hello lines in file1 of file2, lines together, ideas?

can done using statement?

for /f "tokens=1,* delims==" %%a in ('find "hello" ^< file2') set helloa=%%b 

thanks in advance answers

try this:

@echo off &setlocal /f "tokens=1*delims=:" %%i in ('^<file2.txt findstr /n "hello"') set "#%%i=%%j" (for /f "delims=" %%i in (file1.txt) (     set "line=%%i"     setlocal enabledelayedexpansion     if not "!line!"=="!line:hello=!" (         endlocal         if not defined flag (             /f "tokens=1*delims==" %%a in ('set "#"') echo(%%b             set "flag=true"         )     ) else (          echo(!line!         endlocal     ) ))>output.txt 

output in output.txt.

edit: improved behaviour concerning delayed expansion.