// Source: "Software Design ...", John A Robinson, Newnes, 2004, page 227.
int sort(int array[], const int num_in_array)
	{
	int max;
	int position;
	int i, j;
	for (i = num_in_array-1; i >= 1; i--)
		{
		max = array[i];
		position = i;
		for (j = 0; j < i; j++)
			{
			if (array[j] > max)
				{
				position = j;
 				max = array[j];
 				}
			}
		swap(&array[i],&array[position]);
		}
	return(0);
	}