Re: Many Fortran code! How to call Fortran code from C/C++?

From:

"Jim Langston" <tazmaster@rocketmail.com>

Newsgroups:

comp.lang.fortran,comp.programming,comp.lang.c++,sci.math.num-analysis

Date:

Tue, 21 Aug 2007 17:39:53 -0700

Message-ID:

<YBLyi.48$E52.21@newsfe12.lga>

"Luna Moon" <lunamoonmoon@gmail.com> wrote in message
news:1187742132.236717.297560@e9g2000prf.googlegroups.com...

Hi all,

As a C/C++ programmer, there are a few reasons to use Fortran:

(1) Fortran is very similar to Matlab and easy to port;
(2) Fortran has support of complex numbers and vectorized numbers and
the operations in Fortran are naturally element-wise, operating on a
whole vector.
(3) There are many scientific codes are in Fortran.

-------------

So how do I call Fortran program from my C program?

I am using MSVS. NET 2003, VisualC++ and Intel C++ therein, and also
the Intel Visual Fortran therein.

To give an example, I want to call a Fortran program from C++, which
is in its bare form, it is a function that evaluates something and
pass the results back; I also want to call C++ from Fortran, one
example is that many good numerical integral codes are in Fortran, but
I want to provide my integrand function in C++.

How to do these interfaces? Pointers and readings are appreciated!
Thanks for your help!

From Fortan calling C++, make sure the C++ functions are declared extern "C"
so there is no mangeling going on. Then check to see how to call C
functions from Fortran.

Either way, you'll have to check your compiler's documentation. It can be
different for different compilers.