求解立方根
计算一个浮点数的立方根，不使用库函数。保留一位小数。
输入描述：
待求解参数，为double类型（一个实数）输出描述：
输出参数的立方根。保留一位小数。示例1
输入
19.9输出
2.7示例2
输入
2.7输出
1.4Java 编程
package cn.net.javapub.demo2.demo;/*** @author: shiyuwang*/import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;public class Main {public static void main(String[] args) throws IOException {BufferedReader br = new BufferedReader(new InputStreamReader(System.in));double input = Double.parseDouble(br.readLine());boolean flag = false;if (input < 0) {flag = true;input = -input;}double distance = input;//误差或者增加的距离double index = 0;double last = 0;while (true) {last = index * index * index;if (last > input) {index -= distance;distance /= 10;}if (distance < 0.001) {break;}index += distance;}double result = (int) ((index + 0.05) * 10) / 10.0;if (flag) {result = 0 - result;}System.out.println(result);}
}展示效果：
