Batch : Rename a file according to the dir command

Question

I have an issue to rename a file to a result of a dir. Example :

I have a folder name candidate in C drive and inside candidate folder there is below files :

1. something.txt
2. everything.doc
3. onething.bmp

When I dir , I will get the listing of the files.

In the folder will always be 1 txt file and 1 bmp file

How can I rename the BMP file so it will have the same name as the TXT file assuming that I use dir *.txt

In the example above how can I change onething.bmp to something.bmp

Thanks in advance for any answers

Answer 1

for %%X in ("*.txt") do (
 for %%Y in ("*.bmp") do (
  echo ren %%Y %%~nX%%~xY
 )
)

remove the echo if the output is what you need.

For explanation of %%~nX etc. see for /?