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

int main ( )
{
  int *ap;
  int i;
  int j;
  int n;
//
//  Choose dimension at random between 1 and 100.
//
  for ( i = 1; i <= 4; i++ )
  {
    n = 1 + rand ( ) % 100;
    printf ( "\n" );
    printf ( "Create int array of dimension N = %i\n", n );
//
//  Using malloc() and free() requires including stdlib.h.
//
    ap = ( int * ) malloc ( n * sizeof ( int ) );

    printf ( "Address of array is AP = %p\n", ap );
//
//  You can store information in the array using [] for indexing.
//
    for ( j = 0; j < n; j++ )
    {
      ap[j] = rand ( ) % 1000;
    }
    printf ( "Last entry in array is AP[%i] = %i\n", n-1, ap[n-1] );
    printf ( "Last entry in array is *(AP+%i) = %i\n", n-1, *(ap+(n-1)) );
//
//  You can free up the memory using "free()";
//
    free ( ap );
  }

  return 0;
}