Questions tagged [fortran]
Fortran is a general-purpose, procedural, imperative programming language that is especially suited for numeric computation and scientific computing.
34 questions
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Identifies connected elements and faces in FE mesh
So I'm conscious that this is a weak appeal for best practices. I'm building a converter that moves generic FE meshes to an inhouse edge format in Fortran and at some point I made a truly diabolical ...
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FORTRAN90 test suite for Project Euler
The intent of this test file is to go through each of my Project Euler solutions and see if they:
return the correct answer, and
do so in under 60 seconds (unless expected otherwise).
I am using ...
- 63
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N-body simulation in coarray Fortran
I am new to coarray Fortran and wrote a naive nbody-simulation. It is about 30x slower than an implementation in C + gasnet or C + openSHMEM.
I compiled with gfortran -O3 -march=native -mtune=native -...
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Search through fortran source for a string ignoring comments
I am trying to write a python script that can search through Fortran code
ignoring comments. I didn't find a simple way of doing this using grep. So I startwed writing my own.
The rules for comments ...
- 123
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Enum Class in Fortran
I tried to implement something like a C++ enum class in Fortran. That means it should be typesafe and scope bound. (No comparison between integers and enum values ...
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Rainfall challenge: procedural implementation
This evening I have seen the text of the Rainfall Challenge posted seven years ago by Hunter McMillen. I did not look at his solution (besides, I have no clue about perl), but I was intrigued by the ...
- 300
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A postfix (a.k.a. Reverse-Polish Notation - RPN) calculator
As an exercise, I put together a postfix calculator using modern Fortran. Language apart, I am interested in knowing your take on the algorithm. As far as I remember from my freshman year (chemistry - ...
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Command-line parameters
Several years ago (must have been 2012 or so) I wrote a module to manage command-line parameters in a unix-like fashion. At the time, the compilers I had access to were still working their way up to ...
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Integer to Roman Numeral conversion
As a little standard exercise, I wrote an integer to roman numerals converter in F03. The result looks already neat enough, for my standards, but I wonder whether it could be made snappier without ...
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Simulating the orbits of the Earth, Moon and Sun together in Fortran
This has been racking my brain for hours now. I will try to explain as much as I can. I'm aware this code is horrendously ungraceful, but I'm new to Fortran and making things more efficient is not ...
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Return union and complement of three sets
I would be especially happy to hear opinions about complement_union.
The rest of the code is just there to test the output.
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Reverse quick sort in Fortran
I have written a quick sort routine to inplace sort an array in descending order:
...
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Fortran 90 / openmp heat transfer simulation optimization
I'm a newbie playing around with Fortran 90 and openmp and wrote the code below (a simple 2D heat transfer simulation) for testing purposes.
So far I don't see any speedup by using openmp / parallel ...
- 141
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Lightweight lock using OMP atomic
I am working on a Monte Carlo simulation using OpenMP multithreading. To avoid race conditions when multiple threads work on the same resolution element, I have implemented the following ...
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