Re: [suse-programming-e] C-Fortran interface

Thak you. Worked examples are always welcome to understand the rules. It's not clear if the C external struct must be embedded in that "pack" declaration. In some other similar websites it is stated that a particular include file must be included in the C module ... This is confusing ... Maura On Tue, 6 Jun 2006, Jerry Feldman wrote:

On Tuesday 06 June 2006 4:04 pm, Maura Edeweiss Monville wrote:

...

I do not have experience of interfacing Fortran with C.. I mean exchanging and sharing data between C routines and Fortran routines linked together. I would appreciate some guidelines how to do that.

Basically, assume the following common block is defined in a fortran routine called "m1505.f": COMMON/LEXP/DLEXP,TO,AINT

That is the Fortran routine defined the common block named "LEXP" containing the three valiables DLEXP, TO, AINT Now assume that such a Fortran routine is linked to some C routines and some Tcl/Tk procedures through a GNUmakefile. How can I, from inside a C routine, access the content of the variable AINT in the common block LEXP ? It's been a while since I have done some mixed code. Essentially, the FORTRAN Common block is roughly equivalent to the C static storage class. In C, you should be able to access them by name. In C, for instance extern double DLEXP;

http://h21007.www2.hp.com/dspp/files/unprotected/Fortran/docs/vf-html/pg/pgw...

However, be very careful. While floating point and integer variables have the same format, strings, structures, and arrays are quite different.

-- Jerry Feldman Boston Linux and Unix user group http://www.blu.org PGP key id:C5061EA9 PGP Key fingerprint:053C 73EC 3AC1 5C44 3E14 9245 FB00 3ED5 C506 1EA9

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