题解 | #求小球落地5次后所经历的路程和第5次反弹的高度#

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
        while (in.hasNextInt()) { // 注意 while 处理多个 case
            int height = in.nextInt();

            ballHigh(height);
        }
    }

    private static void ballHigh(int height) {
        double sum = 0;
        double down = height; //下落过程
        double up = (double) height / 2; //弹起过程
        for (int i = 0; i < 4; i++) {
            sum += down;
            sum += up;
            down = up;
            up = down / 2;
        }
        System.out.println(sum + down);
        System.out.println(up);
    }
}