China DOS Union

set a=123
set b=1234
How to replace the same parts in b with 0 using variable a?
Is it like this? How to write variable A?
echo %b:a=0%

The code is as follows:

@echo off

setlocal enabledelayedexpansion

set a=123

set b=1234

set "b=!b:%a%=0!"

echo %b%

pause

If
set a=123
set b=1234
And finally, how to write the code so that echo %b% displays 0004?

Originally posted by weilong888 at 2006-10-11 09:33:
If
set a=123
set b=1234
And finally, how to make echo %b% display 0004?
How should this code be written?

Change set "b=!b:%a%=0!" to set "b=!b:%a%=000!" to achieve it.

It is also possible to use environment variables without enabling delay, but there are relatively large limitations:

set "a=123"

set "b=1234"

echo %b:%a%=000% | findstr .