[petsc-users] read variables from a source file in petsc

[Sepideh Kavousi]

Hi all,

I wrote a petsc code, and I defined my variables in a separate file, namely 
common.h, and common.c as following


common.h:

extern int i;
extern int n;


common.c:


#include <petsc.h>
#include "common.h
PetscScalar i;      // Define i and initialize
PetscScalar n;      // Define n and initialize
i=2.2;
n=3.5;
Now in my prog.c  code I have:

#include <petsc.h>
#include <common.h>
static char help[]="program main";
int main (int argc, char **argv){
PetscInitialize(&argc,&argv, (char*) 0,help);
PetscPrintf(PETSC_COMM_WORLD,"i=%f!\n",a);
PetscPrintf(PETSC_COMM_WORLD,"n=%f!\n",b) ;
PetscFinalize();
}

if my it was not using petsc and it was a normal c code, I could run it using 
the following command:
          gcc prog. c common.c
but now that I am using petsc, I do not know how should I include common.c in 
my makefile.
my makefile looks like this:

include ${PETSC_DIR}/lib/petsc/conf/variables
include ${PETSC_DIR}/lib/petsc/conf/rules
prog: prog.o  chkopts
-${CLINKER} -o prog.out prog.o ${PETSC_LIB}
${RM} *.o
.PHONY: distclean rune_1 test
distclean:
@rm -f *~ prog
Thanks,
Sepideh