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From: tasayco@phoenix.Princeton.EDU (Maria Tasayco)
Newsgroups: comp.sys.atari.st
Subject: GFA BASIC and C
Message-ID: <4058@idunno.Princeton.EDU>
Date: 14 Nov 90 17:30:48 GMT
Sender: news@idunno.Princeton.EDU
Organization: Princeton University, Princeton, New Jersey
Lines: 39


 I received the following message from a person who needs help in
interfacing GFA BASIC with C, and cannot post to the net. If somebody 
can help him please send mail to 21c19@titan.hts.hsa.nl
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Hi !
I have a problem using C in GFA-basic and since you seem to know quite a lot
of C-language, I mailed you. (We are not allowed to post articles).
The problem is that I have a certain basic-program, which uses a routine
very much, so I have written this routine in C.
(The routine calculates the determinant-value of a matrix).
You can call a C-routine in gfa by the command :
var = C:adress(param1,param2,param3 etc)
where adress is the starting-adress of the C-compiled program.
This command does not seem to work quite well, the c program is not executed
and the interpreter returns with the error "three bombs bus error."
So I made a very simple program just to test the command. The program :

adress=MALLOC(2000)    ! reserve 2kbytes of memory for program
BLOAD "A:\PROGRAM.PRG",adress  ! Load program in reserved memory
result = C:adress()    ! No parameters, execute c program
dummy=MFREE(adress)    ! release reserved memory

The c-source :
#include <stdio.h>

float main()
{
printf("This is a c program");
}

I am using the Turbo-C compiler.
Do you know a solution to this problem ?
If not, would you please be so kind to post the article on comp.sys.atari.st ?

Thanks in advance,
Roland (HTS Alkmaar, The Netherlands)
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Please send replies to: e21c19@titan.hts.hsa.nl