public class Math
{
    /**
     * Returns base<sup>exponent</sup>.
     *
     * @param base the base.
     * @param exponent the exponent.
     * @pre. exponent >= 0
     * @return base<sup>exponent</sup>.
     */
    public static int pow(int base, int exponent)
    {
	int pow;
	if (exponent == 0)
	{
	    pow = 1;
	}
	else
	{
	    pow = base * Math.pow(base, exponent - 1);
	}
	return pow;
    }

    /**
     * Returns base<sup>exponent</sup>.
     *
     * @param base the base.
     * @param exponent the exponent.
     * @pre. exponent >= 0
     * @return base<sup>exponent</sup>.
     */
    public static int pow(int base, int exponent)
    {
        int pow;
        if (exponent == 0)
	{
	    pow = 1;
	}
        else if (exponent % 2 == 0)
	{
	    int temp = Math.pow(base, exponent / 2);
	    pow = temp * temp;
	}
	else
	{
	    pow = base * Math.pow(base, exponent - 1);
	}
        return pow;
    }
}