Save filenames to textfile and add a string in front of line

Question

I would like to save the output of a list of files to a file (by using a Windows batch file). I know I can do this by the command dir /b *.* > start.txt, but for each line in the file "start.txt" I would like to add @@ in front of the file name. So the contents of start.txt should be:

@@filename1  
@@filename2
...

I know by using the command Echo I can add text. But how can I do this for each line that is written to the file?

Answer 1

Use the for parser on the output of dir:

(for /f "usebackq" %%l in (`dir /b \`) do echo @@%%l) > start.txt

Note the %% escaping - this is required when running inside a .bat/.cmd, which you presumably are.