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I work with many different models and simulations. Some of the older models and simulations are written in FORTRAN. Some of those models have been converted to C++, but the current trend is to create these models using MATLAB/SIMULINK. From a computer science perspective I have always felt MATLAB/SIMULINK was not a good solution. What language do you use to create models and simulations and why?
I also work with a lot of legacy code, most of it in Fortran. I really don’t mind using Fortran – all the modern compilers allow variable names greater than the old and silly 6 character limit. Also, with Fortran 95, you can even do OOP if you feel that your modifications to the existing codebase would benefit.
Also, there are very good code editors for Fortran, which isn’t always the case for more specialized script languages.
C++ has the great disadvantage of memory considerations. I have been programming C/C++ for 20+ years now, and I still forget to delete objects and properly fill in destructors.
On a final note, if you’re using Windows, there is a Fortran.NET compiler (I think from Lahey-Fujitsu?) if you want to move your Fortran to a managed environment.
Good luck!