// Source: "Software Design ...", John A Robinson, Newnes, 2004, page 228.
int sort(int array[], const int num_in_array)
	{
	int i, j, temp, current;
	for (i = 1; i < num_in_array; i++)
		{
		current = array[i];
		for (j = i-1; j >= 0; j--)
			{
 		if ((temp = array[j]) <= current)
  			break;  // out of the inner for loop
			array[j+1] = temp;
			}
		array[j+1] = current;
		}
	return(0);
	}