//InterestTable2.java

/**
 * Displays a two-dimensional table showing how
 * interest rates affect bank balances.
 */
public class InterestTable2
{
    public static final int ROWS = 10;
    public static final int COLUMNS = 6;

    public static void main(String[] args)
    {
        int[][] table = new int[ROWS][COLUMNS];
        for (int row = 0; row < ROWS; row++)
            for (int column = 0; column < COLUMNS; column++)
                table[row][column] =
                    getBalance(1000.00, row + 1, (5 + 0.5 * column));

        System.out.println("Balances for Various Interest Rates "
            + "Compounded Annually");
        System.out.println("(Rounded to Whole Dollar Amounts)");
        System.out.println();
        System.out.println("Years  5.00%  5.50%  6.00%  6.50%  7.00%  7.50%");

        showTable(table);
    }

    /**
     * Precondition: The array anArray has ROWS rows and COLUMNS columns.
     * Postcondition: The array contents are displayed with dollar signs.
     */
    public static void showTable
    (
        int[][] anArray
    )
    {
        for (int row = 0; row < ROWS; row++)
        {
            System.out.print((row + 1) + "      ");
            for (int column = 0; column < COLUMNS; column++)
                System.out.print("$" + anArray[row][column] + "  ");
            System.out.println();
        }
    }

    public static int getBalance
    (
        double startBalance,
        int years,
        double rate
    )
    {
        double runningBalance = startBalance;
        for (int count = 1; count <= years; count++)
            runningBalance = runningBalance * (1 + rate / 100);
        return (int)(Math.round(runningBalance));
    }
}