//import MagicSquare;


public class OddOrderMagicSquare extends MagicSquare
{

    public OddOrderMagicSquare(int startValue, int n)
    {

        super(startValue, n);

        // start from the middle cell in row 0
        int index = n/2;

        setCell(index, startValue);
        for (int i=startValue+1; i<startValue+n*n; i++)
        {
            index = getIndex(index);
            setCell(index, i);
        }


    }


    public int getIndex(int lastIndex)

    {
        int index;
        int n = getOrder();
        int offset;
        if (lastIndex % n == n-1)
        {
            // last cell in last column
            offset = n*n-2*n+1;
        }
        else
        {
            // last cell not in last column
            offset = n*n-1*n+1;
        }
        index = (lastIndex+offset) % (n*n);
        if (isCellFilled(index))
        {
            // cell is directly below last cell
            index = (lastIndex+n) % (n*n);
        }
        return index;


    }


    public static void main(String[] args)
    {
        MagicSquare magicSquare;
        for (int i=1; i<10; i++)
        {
            int n = 2*i+1;
            System.out.println/(n+" by "+n+" magic square:");
            magicSquare = MagicSquareFactory.create(1, n);
            System.out.println/(magicSquare);
        }


    }

}