String replacement in batch file
You can use the following little trick:
set word=table
set str="jump over the chair"
call set str=%%str:chair=%word%%%
echo %str%
The call
there causes another layer of variable expansion, making it necessary to quote the original %
signs but it all works out in the end.
You can use !, but you must have the ENABLEDELAYEDEXPANSION switch set.
setlocal ENABLEDELAYEDEXPANSION
set word=table
set str="jump over the chair"
set str=%str:chair=!word!%