数值的整数次方

给定一个double类型的浮点数base和int类型的整数exponent。求base的exponent次方

public class Solution {
        static boolean b = false;
        public double Power(double base, int exponent) {
        if (equal(base, 0)) {
            return 0;
        }
        if (base < 0) {    //底数为负数
            if (exponent % 2 == 0) { //偶数个
                base = -base;
            }
        }
        if (exponent < 0) {
            exponent = -exponent;
            b = true;
        }
       return CyclicComputation(base, exponent);
  }
     public double CyclicComputation(double base, int exponent) {
        double text = 1;
        while (exponent > 0) {
            text *= base;
            exponent--;
        }
        if (b) {
            text = (1 / text);
        }
        return text;
    }

    //判断base是否为0，在计算机内表示小数时都有误差，判断两个小数是否相等，判断它两之差的绝对值是否在一个很小的范围内即可
    public boolean equal(double base, int m) {
        double temp = base - m;
        return temp > -0.0000001 && temp < 0.0000001;
    }
}