/*
 * The MIT License (MIT)
 *
 * Copyright (c) 2014 Sada Kurapati <sadakurapati@gmail.com>
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 */

package com.sada.misc;

public class MathUtils {
    public static void main(String[] args) {
        double base = 2000000000;
        double exp = 31;
        //System.out.println(pow(20, 50000));
        System.out.println(pow2(base, exp));
        System.out.println(java.lang.Math.pow(base, exp));
    }

    public static double pow(double base, double power) {
        if (power <= 0) {
            return 1.0;
        } else {
            return pow(base, power - 1) * base;
        }
    }

    public static double pow2(double base, double power) {
        double result = 1;
        while (power != 0) {
            if (power > 0) {
                --power;
                result *= base;
            } else {
                result /= base;
                ++power;
            }
        }
        if (result > Double.MAX_VALUE) System.out.println("Overflow");
        return result;
    }
}
