Hello, I'm working on some project where I use the type mpz_t from the GMP C library. I have some problems passing an array of structures (containing mpz_ts) adress to a function : I wille try to explain my problem with some code.

So here is the structure :

 struct mpz_t2{
    mpz_t a;
    mpz_t b;
  };
  typedef struct mpz_t2 *mpz_t2;

void
petit_test(mpz_t2 *test[])
{
  printf("entering petit test function\n");
  for (int i=0; i < 4; i++)
  {
    gmp_printf("test[%d]->a = %Zd and test[%d]->b = %Zd\n", test[i]->a, test[i]->b);
  }
}



/* IN MAIN FUNCTION */

mpz_t2 *test = malloc(4 * sizeof(mpz_t2 *));

  for (int i=0; i < 4; i++)
    {
      mpz_t2_init(&test[i]); // if I pass test[i] : compiler error
      mpz_set_ui(test[i].a, i); //if test[i]->a compiler error
      mpz_set_ui(test[i].b, i*10); //same problem
      gmp_printf("%Zd\n", test[i].b); //prints correct result
    } 
  petit_test(test);

The programm prints the expected result (in main) but after entering the petit_test function produces a segmentation fault error.

I would need to edit the mpz_t2 structure array in petit_test. I tried some other ways allocating and passing the array to the function but I didn't manage to get this right.

If someone has a solution to this problem, I would be very thankfull!

Regards, jérôme.