[SOLVED] Where is the error in a Gfortran file?

AlexBB · 10-18-2014, 03:30 PM

Hi there. My environment is: Win 7==>Oracle VB=>>Ubuntu==>Gfortran. I am trying to restore my previous FORTRAN skills starting with something elementary. This is the code:

Code:

#Attempt to read a few files in the directory and compare the values
program main
   real :: val
   900 format (F8.3)
   open (unit=1, file = "gray_disk_impr_100_256_128.dat", status = 'old')
   read (unit=1,900) val
   write (unit=6,900) val
   close (unit=1)
end

While compiling I get this error. It points to read and write statements (identical errors). The pointer points to the number 900 (format). It says:

Code:

fortran_1.f08:6.16:

   read (unit=1,900) val
                1
Error: Syntax error in READ statement at (1)

You can see that the source code file extension is .f08. I also tried to use an asterisk instead of a numbered format statement and it gave me an error. Where is the problem?

Thanks, - Alex

P.S. Also Is there a description of all error codes for GFortran?

AlexBB · 10-18-2014, 04:00 PM

OK, I found the error:

The read statement should have been:

read(1,900), that's it. "unit" killed it. The same is of course true for the write statement. The last unresolved issue I have is a warning: illegal preprocessing directive. It does not say what kind. I really do not have any. Thanks.

ndc85430 · 10-19-2014, 03:06 AM

Yes you do - your first line. You use '!' to denote comments in Fortran, not '#'.

AlexBB · 10-19-2014, 11:42 AM

Wow, it worked! It may be the most valuable suggestion I have received here for some time. Appreciate it. Thanks.