猴子吃桃（递归）

import java.util.Scanner;public class Work05 {public static int sum(int days){if(days==10){return 1;}return (sum(days+1)+1)*2;}public static void main(String[] args) {//int sum = 1;////for(int j=9;j>0;j--){//sum=(sum+1)*2;//}Scanner sc=new Scanner(System.in);System.out.print("请输入天数:");int days=sc.nextInt();System.out.println("第"+days+"天所剩的桃子为:"+sum(days));}}