題目描述

給定一個double型別的浮點數base和int型別的整數exponent。求base的exponent次方

題目連結：https://www.nowcoder.com/practice/1a834e5e3e1a4b7ba251417554e07c00

public class Solution {
    public double Power(double base, int exponent) {
        int r = Math.abs(exponent);
        double temp = 1.0;
        while (r >
 
 0) {
            temp *= base;
            base *= base;
            r = r >> 1;
        }
        return exponent >= 0 ? temp : 1/temp;
    }
}