Help with Fortran 77 - File Opening Questions

[Bruno Solheid]

Hi, I have some doubts about how to open files in fortran 77.
The file must to be inside some particular directory?
Sorry about my english.

 

[mathmate]

If you are using Windows, try the following code. If you are using Unix or Linux, change the back-slash to slash, and use the appropriate directory name, for example:
/usr/myname/f77/test.dat
The status could be 'new', 'old', 'unknown', and there are other options.

C      open(10, file='testopen.dat',status='unknown')
C      open(10, file='..\testopen.dat',status='unknown')
       open(10, file='c:\proj\f77\testopen.dat',status='unknown')
C      read(10,*)x
C      read(10,*)y
C      print *,x,y
C      rewind 10
      write(10,*)10.0
      write(10,*)12.0
      print *,10.0,12.0
      stop
      end

 

[quicknote]

Hello, opening files in Fortran 77 is a straightforward process. First, you need to declare the file name and its associated unit number in the program. Then, you can use the OPEN statement to open the file for reading or writing. The file does not have to be in a specific directory, but you do need to provide the full path to the file if it is not in the current working directory. Additionally, make sure to use the correct file mode (e.g. 'READ' or 'WRITE') and specify the file format (e.g. 'FORMATTED' or 'UNFORMATTED'). If you are still having trouble, please provide more specific details about your doubts and I will be happy to assist you further. And don't worry about your English, it's not a problem. Let me know if you have any further questions.