array-param-06.c

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

int read_something (int **a)
{
  int n;
  printf ("Wie viele Zahlen? ");
  scanf ("%d", &n);
  int *b = malloc (n * sizeof (int));
  for (int i = 0; i < n; i++)
    {
      printf ("%d. Zahl: ", i + 1);
      scanf ("%d", b + i);  /* andere Schreibweise: &a[i] */
    }
  if (a)
    *a = b;
  return n;
}

int main (void)
{
  int *x = NULL;
  int numbers_read = read_something (&x);
  printf ("%d eingegebene Zahlen:", numbers_read);
  for (int i = 0; i < numbers_read; i++)
    printf (" %d", x[i]);
  printf ("\n");
  free (x);
  return 0;
}