题解 | #求解立方根#

import java.util.Scanner;

// 注意类名必须为 Main, 不要有任何 package xxx 信息
public class Main {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        // 注意 hasNext 和 hasNextLine 的区别
        double a = in.nextDouble();
        double left = 0;

        double mid = 1;
        double c = Math.abs(a);
        double right = c;
        if (c < 1) {
            right = 1;

        }
        while (right - left > 0.001d) {
            mid = (left + right) / 2;
            if (mid * mid * mid > c) {
                right = mid;
            } else {
                left = mid;
            }
        }
        if (a < 0) {
            System.out.print("-");

            System.out.printf("%.1f", mid);

        } else {
            System.out.printf("%.1f", mid);
        }
    }
}