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Hi all, I'm very new to C++, having come from a Fortran 90+ and MATLAB background. I've been playing with pointers in C++, and I've stumbled upon something I can't quite explain. This is an arbitrary example I've come up with, just from messing around, trying to understand how C++ works. In...

I'm trying to translate a piece of code from MATLAB to Fortran (one that typically has lots of iterations), line-by-line. To check that everything is fine and dandy, in both, I output all of the variables at each assignment (an arduous process!). What I've found is that as the iterations...

I have a program, which I compile on my 32-bit Windows 7 system with gfortran (http://users.humboldt.edu/finneyb/gfortran-windows-20110214.exe); execution time is about 90 milliseconds. I then gave this source code to a colleague who is running the same version of Windows, except 64-bit. He...

I'm playing around with FLIBS (http://flibs.sourceforge.net/), and getting some strange behaviour with csv_write. To test just this module, I copy "csv_tst.f90" from "/tests/strings" and "csv_file.f90", "csv_file_1d.f90", "csv_file_2d.f90" from "/src/strings" to the same folder. If I compile...

(I could have sworn I posted this a week or so ago, and then it disappeared. I hope it's not a duplicate; if it is, my apologies.) Is there a portable way of returning the directory structure and contained files to Fortran for processing? An example of what I want to do: - Get the...

I'm using Excel 2007 to manipulate some CSV files. Excel by default displays a certain number of decimal places in any given cell, the rest being rounded, unless it is given explicit instructions to display X number of decimal places. My file has, for example, an entry of 0.0000078544. This...

I want to set the option --enable-auto-import for ld, just to get ld to shut up with its "info"; it typically says: "warning: auto-importing has been activated without --enable-auto-import specified on the command line". It's this warning that I want to suppress. However, gfortran automatically...

Hi all, I'm sure this is obvious to many of you, but it wasn't to me! I just had a little revelation regarding variable-length arrays as the output of subroutines/functions, and I have to share this with those of you who don't know, because I can't contain my excitement. ;) I was just sitting...

Hi all, I'd like to be able to read a header line of a CSV as a character type, and then count the number of commas there (i.e. to determine the number of columns), without having to assign a fixed length to the character. The way I'd like to do it is to read the first line character by...

Hi all, I'm back with another question. I think the title of this thread does need a bit of explanation. I've downloaded LAPACK (which contains the BLAS source) and LAPACK95 from netlib.org. As I understand it, LAPACK95 depends on LAPACK, which in turn depends on BLAS. I want to compile all...

I've been looking at the code in the DVODE_F90 module I mentioned in another thread. It was translated from F77 to F90, I believe, so some older constructions exist. What does the following do with the "60"? "DO 60", "GOTO 60" pointing to "END DO". DO 60 I = 1, NGC IF...

Hi guys, I'm trying to get DVODE_F90 working. It can be found here: http://www.radford.edu/~thompson/vodef90web/vodef90source/dvode_f90_m.zip In that zip file are the module "dvode_f90_m.f90" (it's buried in the folder, you'll see) and an example for testing it called -- wait for it --...

Hi all, I've been trying to track down the Open Scientific Library for a while now; it is officially hosted at http://libosl.org, but the site has been down for about a week now, as far as I can gather. I've emailed the guy who created it, but have yet to receive a reply. I don't want to pester...

I'd like to use the GNU Scientific Library (GSL) with Fortran 90 and later -- it has almost anything I'd need. Pity it's all in C. Now, I know it can be done: I've found two sites which deal with this...

Hi there, I'm just playing around with derived data types, and so I made some functions to see how to pass them to different program units. So, for example, I define a type "vector", which has an "x" and a "y" component, which I pass to a function which simply adds the "x" and the "y" and...

Hi, I'm currently starting work on an engineering package that's calculations will be done with Fortran 95, with a GUI in Delphi (or to be more accurate, Lazarus: http://en.wikipedia.org/wiki/Lazarus_%28software%29). Before I start any coding, I've been working on a "battle plan" for this...

Hi all, I'm pretty new to Fortran (only dabbled in it a bit last year), but Google isn't terribly forthcoming with answers. I'm sure I'll be posting plenty of questions here, but my first one isn't related to programming, as such. How are GCC and gfortran related? I ask this, because on...