java 面试每日一题

题目：一球从100米高度自由落下，每次落地后反跳回原高度的一半；再落下，求它在 第10次落地时，共经过多少米？第10次反弹多高？

 

import java.util.Scanner;

public class testOne {

    /**
     * @param args
     */
    private double totalHeight=100;
    private double curHeight=50;
    //下落
    public void drop(int times){
        if((times-1)==0){
            return ;
        }
        setTotalHeight(getTotalHeight()+2*getCurHeight());
        setCurHeight(getCurHeight()/2);
        drop(times-1);
    }
    private void setCurHeight(double CurHeight) {
        curHeight=CurHeight;
    }
    public void setTotalHeight(double TotalHeight) {
        totalHeight=TotalHeight;
    }
    public double getCurHeight() {
        return curHeight;
    }
    public double getTotalHeight() {
        return totalHeight;
    }
    public static void main(String[] args) {
        System.out.println("请输入次数：");
        Scanner sc=new Scanner(System.in);
        int i=sc.nextInt();
        
        testOne main=new testOne();
        main.drop(i);
        System.out.println("总高度是"+main.getTotalHeight());
        System.out.println("最后一次反弹高度是"+main.getCurHeight());
        
    }

}