How do I accomplish renaming numbered files to its smaller number

[abdulbadii]

How do I accomplish renaming bulky indexed files to its smaller index number, with any kind of tools ?
That is to rename

1.c -> 0.c

2.c -> 1.c

...

7.c -> 6.c

8.c -> 7.c

9.c -> 8.c
...
...
(in large numbers of files.) Thank so much in advance

 

[Mr Evil]

There are some tools available for bulk renaming files, such as Ant Renamer.

If there are no gaps in your file names, e.g. you have a file for every number from 1-9 etc. then it's easy to do with the "enumeration" action in Ant Renamer. If there are gaps then I think it will still be possible by using the "regular expression" action, but it's complicated.

 

[abdulbadii]

I solve and answer mine. on Windows cmd.exe console:

cmd /v /k
for /f %x in ('dir /b ??.c') do (set/a t=%~nx-1 &ren %x !t!.c)

rename to greater number; dir in reversed and +1, i.e. use:

dir /b /o-n
t =%~nx-1

Much better is to get TCC/LE more improved and sensible cmd.exe duplicate

 

[abdulbadii]

I'd solve and answer mine. on Windows cmd.exe console type:

cmd /v /k
for /f %x in ('dir /b ??.c') do (set/a t=%~nx-1 &ren %x !t!.c)

rename to greater number; dir in reversed and +1, i.e. use:

dir /b /o-n
set/a t =%~nx+1

Much better to get TCC/LE more improved and sensible cmd.exe duplicate