A PUZZLING QUESTION: Does Matlab's Mex file support external inputs and outputs?

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Hi, I would like to ask if Mex (Fortran) files are able to use Fortran's OPEN/CLOSE/WRITE/READ from files command?
If yes, how do I implement it in Matlab's Mex files? Else, are there any alternatives to output in an external document?
Thanks
Zhonghao

Answers (1)

James Tursa
James Tursa on 9 Jun 2014
Yes, you can use native Fortran file I/O in mex routines. Just write the code as you normally would. The main restriction is in screen I/O ... you can't READ(5,etc) or WRITE(6,etc) in a mex routine as the operations will not work properly. But file I/O is OK.
  5 Comments
James Tursa
James Tursa on 11 Jun 2014
Edited: James Tursa on 11 Jun 2014
Yes, but what is the specific message you see on the screen? Anything? Does anything show up in the Test.txt file?
Zhong Hao
Zhong Hao on 11 Jun 2014
Sorry for the confusion.
An output 'Test.txt' file was created but it is empty. Matlab also crashes when the program was being run.
I've tried compiling and running this on windows 64bit and strangely it works. (by the way, I was using OSX mavericks matlab 2012a with gfortran compiler)
Do you have any idea why this happens?

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