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Full Discussion: FORTRAN: Loop over variable file names
Top Forums Programming FORTRAN: Loop over variable file names Post 302942152 by saleheen on Friday 24th of April 2015 06:31:43 PM
Old 04-24-2015
FORTRAN: Loop over variable file names
Hi guys

I'm a beginner in fortran. So excuse me for my naivety, let me briefly describe what I was trying to do. I have let's say 2 files named reac-1 and reac-2. After opening these files I've to do some calculations, close these files and open the same files again in a loop. So my faulty code looks like this:
Code:
do j= 1,29  !temp loop

write(*,*)"This is for temperature: ",T(j)
    
  do i=1,r	! file loop
  write(filename,100)i
  100 format('reac-',I1)											

	write(*,*)"This is for reac-",i
   
   //open file, do something, close file.....//	

  end do	! end file loop

   //do something...//

end do  ! end temp loop

I get a run time error when it enters temperature loop the 2nd time, it stops after printing "This is for reac-1". My guess is it already had reac-1 & reac-2 in 'filename' variable, so it can't write reac-1 again and that's why it crashes.

Could you guys shed some light on it where I'm going wrong here and how can I overcome it?

Thanks a lot!

Saleheen
 

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LEARN ABOUT SUNOS

continue

break(1)							   User Commands							  break(1)

NAME

       break, continue - shell built-in functions to escape from or advance within a controlling while, for, foreach, or until	loop

SYNOPSIS

   sh
       break [n]

       continue [n]

   csh
       break

       continue

   ksh
       *break [n]

       *continue [n]

DESCRIPTION

   sh
       The break utility exits from the enclosing for or while loop, if any. If n is specified, break n levels.

       The continue utility resumes the next iteration of the enclosing for or while loop. If n is specified, resume at the n-th enclosing loop.

   csh
       The  break  utility  resumes  execution after the end of the nearest enclosing foreach or while loop. The remaining commands on the current
       line are executed. This allows multilevel breaks to be written as a list of break commands, all on one line.

       The continue utility continues execution of the next iteration of the nearest enclosing while or foreach loop.

   ksh
       The break utility exits from the enclosed for, while, until, or select loop, if any. If n is specified,	then  break  n	levels.  If  n	is
       greater than the number of enclosing loops, the outermost enclosing loop shall be exited.

       The  continue utility resumes the next iteration of the enclosed for, while, until, or select loop. If n is specified then resume at the n-
       th enclosed loop. If n is greater than the number of enclosing loops, the outermost enclosing loop shall be used.

       On this man page, ksh(1) commands that are preceded by one or two * (asterisks) are treated specially in the following ways:

       1.  Variable assignment lists preceding the command remain in effect when the command completes.

       2.  I/O redirections are processed after variable assignments.

       3.  Errors cause a script that contains them to abort.

       4.  Words that follow a command preceded by ** that are in the format of a variable assignment are expanded with the same rules as a  vari-
	   able  assignment.  This means that tilde substitution is performed after the = sign, and also that word splitting and file name genera-
	   tion are not performed.

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWcsu			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       csh(1), exit(1), ksh(1), sh( 1), attributes(5)

SunOS 5.10							    17 Jul 2002 							  break(1)
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