Using a pre-computed array in another function?

[Alasdair McAndrew]

Hi there,

I have a pre-computed array, which I'd like to use in another function.
 This program shows the sort of thing I'm trying to do - I've created an
array A in the main program, and I need to use those values in my function
"mpz_myfun".  However, this gives me a segmentation fault.

Any ideas as to how I can fix this up so it works?  Oh, I'm using gcc
version 4.6.1 (Ubuntu/Linaro 4.6.1-9ubuntu3) and gmp 5.0.5.

Thanks,
Alasdair

#include <stdio.h>
#include <stdlib.h>
#include <gmp.h>

mpz_t b,r,j,p,T,n,out;
mpz_t *A;

void mpz_myfun(mpz_t r,mpz_t m)
{
  gmp_printf("Zd\n",A[100]);
  mpz_t tmp;
  mpz_init(tmp);
  mpz_and(tmp,m,T);
  mpz_set(r,A[mpz_get_ui(tmp)]);
  mpz_clear (tmp);
}

int main(int argc, char *argv[])
{
   mpz_init_set_ui(b,7);
   mpz_init_set_ui(T,65535);
   mpz_init_set_ui(p,0x7FFFFFFF);
   mpz_init(j);
   mpz_t *A = malloc(65536*sizeof(mpz_t));
   for (unsigned long i=0; i<65536; i++)
     {
       mpz_powm_ui(A[i],b,i,p);
     }

   mpz_init_set_str(n,argv[1],10);
   mpz_init(out);

   mpz_myfun(out,n);

   gmp_printf("%ZD\n",out);

   return 0;
}