Interfacing Ada with C

[Ada novice <posts@gmx.us>]

Hi,
    Having some background in C and in Ada, I would like to have some
examples on how to interface codes between these two languages. I
loved Ada but scientific computing libraries are not available. So I
was thinking to use an available numeric library in C to do some
mathematical operations such as calculations of eigenvalues and
eigenvectors from data in an Ada program. Ada does provide some
routines for eigenvalues and eigenvectors computations but they aren't
suitable for a non-symmetric matrix.

Information on interfacing Ada with C is scarce on the web and it
would help much if I can get some simple examples here from which I
can build up.

So in essence I'm looking for examples which illustrate how to pass
some data (e.g a matrix) from Ada to C, do some computations on the
matrix and return the results to the Ada environment. I understand
that a matrix can always be converted into a sequential row of data
which can be stored say in a file and then be passed to a C numerical
routine for some mathematical operation and then be returned back to
Ada likewise in the form of a data stored sequentially in a file.


Thanks
YC