string manipulation and modification help

[Hilaire VERSCHUERE]

Hi

I would like to write a dos batch file to test a program several times
on different files.

I'v got something like this

prog.exe file.in > file.out

So i need to apply prog.exe to each file of my directory. I've got the
names of all the files (file.in) and I apply my prog to each one, and
I would like to construct the name of file.out using the name of
file.in and changing the extension.

So how can I do it ?

Thanks for answers.

Hilaire VERSCHUERE

[William Allen]

"Hilaire VERSCHUERE" wrote in message

> Hi
>
> I would like to write a dos batch file to test a program several times
> on different files.
>
> I'v got something like this
>
> prog.exe file.in > file.out
>
> So i need to apply prog.exe to each file of my directory. I've got the
> names of all the files (file.in) and I apply my prog to each one, and
> I would like to construct the name of file.out using the name of
> file.in and changing the extension.

Try something along these lines. The generated command
is ECHOed as a demo. Remove the ECHO.{demo!} and the
"quotes" around the command to activate it.

====Begin cut-and-paste (omit this line)
@ECHO OFF
IF (GOTO:)==(%1) %1%2 {Subroutine-Handler}

FOR %%F IN (*.IN) DO CALL %0 GOTO: _FSCAN %%F

GOTO EOF {=Subroutine-section-below=}
:_FSCAN (Usage: CALL %0 GOTO: _FSCAN FileSpec)
SET V=
:: Copy file to %V% extension
COPY %3 *.%%V%%>NUL
:: Grab base name of file in variable FN
FOR %%F IN (*.%%V%%) DO ECHO.SET FN=%%F>%TEMP%.\_FN.BAT
FOR %%C IN (CALL DEL) DO %%C %TEMP%.\_FN.BAT

:: Remove ECHO.{demo!} and "quotes" to activate command
ECHO.{demo!}" program.exe %3 > %FN%OUT "
SET FN=

:EOF {End-of-file}

====End cut-and-paste (omit this line)
Win9x GUI study/demo only. Cut-and-paste as Batch script (file with .BAT
extension). Lines that don't begin with 2 spaces have wrapped by mistake.

This screen capture shows operation. Remove the
ECHO.{demo!} and the "quotes" around the demo
command line in the above script to activate it.

============Screen capture Windows 95
C:\WORK>dir /b *.in
FILE1.IN
FILE2.IN
FILE3.IN
FILE4.IN

C:\WORK>demo.bat
{demo!}" program.exe FILE1.IN > FILE4.OUT "
{demo!}" program.exe FILE2.IN > FILE4.OUT "
{demo!}" program.exe FILE3.IN > FILE4.OUT "
{demo!}" program.exe FILE4.IN > FILE4.OUT "
C:\WORK>
============End screen capture

--
William and Linda Allen
Learn to write Batch Files on your Win95/98/ME PC. Free, interactive
Web Course. Syllabus and Index to Lessons: http://www.allenware.com/

[William Allen]

"William Allen" wrote in message
...snip

> Try something along these lines. The generated command
> is ECHOed as a demo. Remove the ECHO.{demo!} and the
> "quotes" around the command to activate it.

This revised version adds the missing DEL command needed
to remove the transient workfiles:

====Begin cut-and-paste (omit this line)
@ECHO OFF
IF (GOTO:)==(%1) %1%2 {Subroutine-Handler}

FOR %%F IN (*.IN) DO CALL %0 GOTO: _FSCAN %%F

GOTO EOF {=Subroutine-section-below=}
:_FSCAN (Usage: CALL %0 GOTO: _FSCAN FileSpec)
SET V=
:: Copy file to %V% extension
COPY %3 *.%%V%%>NUL
:: Grab base name of file in variable FN
FOR %%F IN (*.%%V%%) DO ECHO.SET FN=%%F>%TEMP%.\_FN.BAT

DEL *.%%V%%

FOR %%C IN (CALL DEL) DO %%C %TEMP%.\_FN.BAT

:: Remove ECHO.{demo!} and "quotes" to activate command
ECHO.{demo!}" program.exe %3 > %FN%OUT "
SET FN=

:EOF {End-of-file}

====End cut-and-paste (omit this line)
Win9x GUI study/demo only. Cut-and-paste as Batch script (file with .BAT
extension). Lines that don't begin with 2 spaces have wrapped by mistake.

--

[Hilaire VERSCHUERE]

Thanks, I tried it, but with no success :( and I understood nothing
!!!

So I wrote it and don't understand why it doesn't work :

FOR %%A IN (*.IN) DO (
Set outFile=%%A
Set outFile=%outFile:.IN=.OUT%
prog.exe %%A > outFile
)

whereas this work :

------------------------
Set outFile=file.in
Set outFile=%outFile:.in=.out%
Echo %outFile%
------------------------

Result:
file.out

I think I made a confusion between var and string but I don't know how
to solve it. So, is there any solution ?

Hilaire VERSCHUERE

[William Allen]

"Hilaire VERSCHUERE" wrote in message

> Thanks, I tried it, but with no success :( and I understood nothing

...snip

The posted Batch demo was for Windows 95/98/ME

> So I wrote it and don't understand why it doesn't work :
>
> FOR %%A IN (*.IN) DO (
> Set outFile=%%A
> Set outFile=%outFile:.IN=.OUT%
> prog.exe %%A > outFile
> )

We don't use Windows 2000/XP (but you are clearly using Windows
2000/XP or similar). You need to understand about delayed Environment
variable expansion to set _and_then_use_ variables within the scope of
FOR IN DO (parentheses). And in any event your line:
prog.exe %%A > outFile
is wrong since you don't expand the outFile variable as %outFile% (but
don't bother, it won't work, you need delayed variable expansion ON and
to use the delayed variable expansion operator ! anyway).

To rewrite your code with delayed variable expansion, read the help under
cmd /?

Alternatively, I think it's generally better to adopt a Subroutine
coding technique, as in this variant of your code, where each
instantiation of the metavariable %%A is passed to a Subroutine
at :FSCAN where the variable will be seen as the %1 parameter

====Begin cut-and-paste (omit this line)
@ECHO OFF

FOR %%A IN (*.IN) DO CALL :FSCAN %%A
GOTO :EOF

:FSCAN
Set outFile=%1
Set outFile=%outFile:.IN=.OUT%
ECHO.{demo!}" prog.exe %1>%outFile% "

====End cut-and-paste (omit this line)

Win2000 simulated study/demo only. Cut-and-paste as Batch script.

Lines that don't begin with 2 spaces have wrapped by mistake.

Remove the ECHO.{demo!} and the "quotes" to activate the command.

If you think that some file names may have embedded [Space]s,
you should "quote" the second instance of "%%A" in the FOR IN
DO line to pass it properly.

============Screen capture Windows 2000 simulated in Win95
C:\WRK2>dir *.in /b
FILE1.IN
FILE2.IN
FILE3.IN

C:\WRK2>demo
{demo}" prog.exe FILE1.IN>FILE1.OUT "
{demo}" prog.exe FILE2.IN>FILE2.OUT "
{demo}" prog.exe FILE3.IN>FILE3.OUT "

C:\WRK2>
============End screen capture

[Hilaire VERSCHUERE]

Exactly, I'm working with Windows 2000.

I tried with a subroutine as you explained and it works perfectly :)

Thanks for all.