import java.math.*;
public class ForPracticeBeggars {

    public static void main(String[] args) {
        int day = 10;
        int money = 0;
        for(int i = 0; i<day;i++){
            money += Math.pow(2, i);
        }
        System.out.printf("洪乞丐干10天，收入是%d", money);
    }
}

public static void main(String[] args) {
       int money = 1;
		int sum = 1;
		for (int i = 1; i <10; i++) {
			 money = money * 2;
			 sum += money;
			System.out.println("i=" + i);
			System.out.println("money=" + money);
			
		}
		System.out.println("sum=" + sum);
    }

package 学习1;
import java.util.Scanner;
public class 学习1_8 {
	public static void main(String[] args) {
		// TODO 自动生成的方法存根
	System.out.println("请输入洪七公乞讨的天数：");
	Scanner n = new Scanner(System.in);
	int a = 1;
        int b;
        int c = 1;
        int i = n.nextInt();
        for (b= 1; b < i; b++) {
            a *= 2;
            c = c + a;
        }
        System.out.println("洪七公一共乞讨到：" + c);
	}
}

import java.util.*;
import java.math.*;
public class text1 {
	public static void main(String arg[]) {
		int days=new Scanner(System.in).nextInt();
		int money=(int)Math.pow(2, days-1); //强制转换了
		int sum=0;
		for (int i=days;i>0;i--) {
			sum+=money;
			money/=2;
		}
		System.out.println("最终共乞讨得："+sum);
	}
}

package com.cwt.study.s_20240419;

public class HelloWorld4forTest {
    /*
    * 练习
    * 天朝有一个乞丐姓洪，去天桥要钱
      第一天要了1块钱
      第二天要了2块钱
      第三天要了4块钱
      第四天要了8块钱
      以此类推

问题： 洪乞丐干10天，收入是多少？*/
    public static void main(String[] args) {
        int i,money=1,sum=0;
        for (i = 1;i <=10;i++){
            sum=sum+money;
            money=money*2;
        }
        System.out.println(sum);
    }
}

int sum=0;
		int money=0;
		for(int j=1;j<=10;j++) {
			if(j==1) 
				money=1;
			else money*=2;
			sum+=money;
			
		}
		System.out.println(sum);

public class Beg {
    public static void main(String[] args) {
        int sum = 0;
        int day = 1; //初始每日收入
        sum += day; //第一天的收入
        for (int i = 1; i <  10; i++) {
            day <<=1;
            sum += day;
        }
        System.out.println("乞丐10天一共赚了"+sum+"元");
    }
}

import java.util.Scanner;
public class xunhuans {
    private static Scanner shuju;
    private static Math Mathath;

    public static void main(String[] args) {
        shuju = new Scanner(System.in);
        String a = "洪乞丐";
        int b = 1;//天数。
        double d = 0;//几次方。
        double e;//收入。
        System.out.println("请输入乞丐的初始资金:");
        int c = shuju.nextInt();//第一天要的钱数。

        //System.out.println(a + "第" + b + "天" + "要了" + c + "块钱。");


        for (;b<=10; b++){
            e = Mathath.pow(c,d);
            d++;
            System.out.println(a + "第" + b + "天" + "要了" + e + "块钱。");
        }

    }

}

public static void main(String[] args) {
        int all = 1;
        for(int i = 0;i<9;i++){
            System.out.println(2<<i);
            all += 2<<i;
        }
        System.out.println(all);
    }

int money=1;
        for (int day=1;day<=10;day++){
            if(day==1){
                System.out.println("第"+day+"天赚了"+money);
            }else{
                money*=2;
                System.out.println("第"+day+"天赚了"+money);
            }
        }

public class Guess {

	public static void main(String[] args) {
		for (int i = 0; i < 10; i++) {
			double p = Math.pow(2, i);
			int s = i+1;
			System.out.println("第"+s+"天收入："+p+"块钱");
		}
	}

public class Main {
    public static void main(String[] args) {
        int sum = 0;
        int money = 1;
       for(int i = 1; i < 11; i++){
           sum += money;  // sum = sum + money
           money = money * 2;
       }
        System.out.println(sum);

    }
}

import java.util.Scanner;

public class HelloWorld_char {
	public static void main(String[] args) {
		Scanner da= new Scanner(System.in);
		int day = da.nextInt();//乞讨天数
		int money=1;
		int sum=0;
		int i=0;
		while(i<day){
			sum+=money;
			money*=2;
			i++;
		}
		System.out.println(sum);
	}
}

public class Beggar {
    public static void main(String[] args) {
        int day=10;//乞丐去乞讨的天数
        int money = 1;//乞丐去乞讨的每天的收入
        int sum = 0;//乞丐去乞讨的总收入

        for (int i = 0; i <day ; i++) {
            sum=sum+money;//乞丐每天的收入累加
            money*=2;//乞丐每天收入翻倍
        }

        System.out.println("乞丐的收入是:"+sum);
    }
}

public class Max {
    public static void main(String[] args) {
        int arr[] = new int[5];//定义一个数组
        int max=0;//定义最大值
        for (int i = 0; i < arr.length; i++) {
            if (arr[i]>max){//当数组中的数大于最大值的时候，这个数就是那个最大值
                arr[i] = max;
            }
        }
        System.out.println(max);
    }
}

public class beg {
    public static void main(String[] args) {
        int day = 10;//乞丐乞讨的总天数
        int sum = 0;//乞丐的总收入
        int dailyincome = 1;
        for (int i = 1; i <=day ; i++) {
            sum +=dailyincome;
            dailyincome*=2;

        }
        System.out.println("乞丐的总收入为："+sum);
    }
}

//for循环
int hq = 1;
int sum1 = 0;
for (int i = 1; i < 11; i++){	
	sum1 += hq;
	hq *= 2;
}

//while循环
int hq = 1;
int i = 0, sum1 = 0;
while(i < 10){	
	sum1 += hq;
	hq *= 2;
	i++;
}

public class For {
    public static void main(String[] args) {
        int money = 1;
        int last = 0;
        for (int day = 1;day<=10;money = money*2,day++){
            last = last+money;
            System.out.println("第"+day+"天");
            System.out.println("收入"+last+"元");
        }
    }
}

int tmp=0;
		for (int i = 1; i <= 10; i++) {
			tmp=tmp+(int)Math.pow(2, i-1);
		}
		System.out.println(tmp);

public class bian {
	public static void main(String[] args) {
		Scanner s = new Scanner(System.in);
		System.out.println("请输入干多少天");
		int a = s.nextInt();
		int b =1;
	    int c =0;
		for(int d=1;d<=a;d++) {
			b=2*b;
			System.out.println("收入是"+b/2);
			c+=b;}
		
		System.out.println("总收入是"+c/2);
		
}}

public class HelloWord {
	public static void main(String[] args) {
		Scanner s = new Scanner(System.in);
        System.out.println("请输入n：");
        int n = s.nextInt();
        int sum = 0;
        int i;
        for (i = 0; i < n; i++){
            sum += Math.pow(2, i);
        }
        System.out.println(sum);
	}
}

package One;

import java.util.Scanner;

public class Session5 {
	public void cN() {
	Scanner sc = new Scanner(System.in);
	 int a =sc.nextInt();
		 int money=1;
		 int sum=0;
		 for(int i=1;i<=a;i++) {
		 sum+=money;
		 money*=2;	 
	}
		 System.out.println(sum);
	}
	public void bN() {
		Scanner sc = new Scanner(System.in);
		int a = sc.nextInt();
		int c= 1;
		long b =a;
		while(c<a) {
			b*=(a-c);
			c++;
		}
		System.out.println(b);
	}
	public void aN() {
		while(true) {
			Scanner sc = new Scanner(System.in);
			try {
			long sum=1;
			int a = sc.nextInt();
			while(a>0) {
				sum*=a;
				a--;
			}
			System.out.println(sum);	
				
			} catch (Exception e) {
				// TODO: handle exception
			}
		}
	}
		public static void main(String[] args) {
			Session5 v1 = new Session5();
			v1.cN();;
			}
}

import java.util.Scanner;
public class Xunhuan{
	int i;
	int xx=0;
	void sum(int b){
		for(i=0;i<=b;i++)
		{
			xx =(int)Math.pow(2, i-1)+xx;
			
		}
		System.out.println(xx);
			}
	public static void main(String[] args)
	{
		Xunhuan j = new Xunhuan();
		System.out.println("第几天:");
		Scanner input = new Scanner(System.in);
		int a = input.nextInt();
		j.sum(a);
		input.close();
	}
}

public class Test16 {
    public static void main(String[] args) {
        int total = 0;
        int sum=0;
        for (int i = 1; i <=10; i++) {
            sum=(int)Math.pow(2,i-1);
            total+=sum;
        }
        System.out.println("洪乞丐10天的总收入是"+total);
    }
}

int money = 1;
        int sum = 1;
        int day=2;
        while (day <= 10) {
            money *= 2;
            sum += money;
            day++;
        }

        System.out.println(sum);

public static void main(String[] args) {
        int money=0;
        int day=10;
        int sum =1;
        for(int i=1;i<=day;i++){
            if(money==0){
                money=1;
            }else{
                money*=2;
                System.out.println(money);
            }
            System.out.println(i);
            sum+=money;
            System.out.println(i+"收入"+(sum-1));//答案是1024，我这里给它减了一就成1023了

public class HelloWorld{
	public static void main(String[] args) {
		int sum=0;
		for(int i=1;i<=10;i++) {
			 int a=2;
			 int b=(i-1);
			 int m = (int)Math.pow(a,b);
			 sum+=m; 
		}
		System.out.println(sum);
	}
}

public class Forxh {
  public static void main(String[]args) {
	  System.out.println("天朝有一个乞丐姓洪，去天桥要钱");
	  double ds;
	  double s=0;
	  for(int d=1;d<11;d++) {
		   ds=Math.pow(d,2);
		  s=s+ds;
		  System.out.println("第"+d+"天要了"+ds+"块钱");
	  }
	  System.out.println("最终10天的收入是"+s);
  }
}

System.out.println("天朝有一个乞丐姓洪，去天桥要钱");
		
		double money=1;
		//int day=1;
		for(int day=1;day<11;day++) {
			money=Math.pow(2,day-1);
			int money1=(int)money;
			System.out.println("第"+day+"天要了"+money1+"元");
		}

import java.util.Scanner;
public class HelloWorld {
	public static void main(String[] args) {
		int sum=0;
		int money=1;
		for(int i=1;i<=10;i++){
			sum+=money;
			money*=2;
		}
		System.out.println(sum);
		}
}

public static void main(String[] args) {
        int money = 1;//设置钱数，因为0x任何数都是0所以不能为0，这个就默认设置第一天的钱数
        int sum = 0;//设置这天的总和
        System.out.println("第一天收入：" + money + "块钱");
        for (int i = 2; i <= 10; i++) {
            //为啥要是二呢？？？因为1x1没有意义，所以可以从第二天开始计算
            money *= 2;//通过观察可以发现每天要的钱数是前一天的两倍
            sum += money;//把每天要的钱数累加起来
            System.out.println("第" + i + "天收入：" + money + "块钱" );
        }
            //为啥要加一呢？？？
            //因为我们第一天没有算上所以要手动加上第一天的钱数
            System.out.println("这个乞丐10天要了" + (sum + 1) + "块钱");

    }

import java.util.Scanner;

public class GeometricSeq {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        System.out.println("输入工作天数：");
        int workdays = sc.nextInt();
        int summoney = 0;
        int day = 0;
            for (int i = 1; i < workdays+1 ; i++) {
               int money = (int)Math.pow(2,i-1);
               System.out.println("第"+ i +"天赚了"+money+"元");
               summoney  += money;
               day = i;
            }
        System.out.println("干"+day+"天总收入为："+ summoney+"元");
    }
}

public class Dome05qigaiyaoqian {
    public static void main(String[] args) {
        int day=10;//天数
        int sum=0;//总收入
        for (int i = 1; i <=day; i++) {
            if (i==1){
                sum=1;
            }else {
                sum=sum*2;
            }
        }
        System.out.println("总收入为"+sum);
    }
}

第1天赚：1
第2天赚：2
第3天赚：4
第4天赚：8
第5天赚：16
第6天赚：32
第7天赚：64
第8天赚：128
第9天赚：256
第10天赚：512
总收入1023

public class HelloWorld {
    public static void main(String[] args) {
        int i=1;
        int sum=0;

        for (int j = 1; j < 11; j++) {

           if (j==1){
                i=1;
           }else {
                i=i*2;
           }
             sum+=i;
            System.out.println("第"+j+"天收入"+sum);
        }

    }
}

public class Test9 {
    public static void main(String[] args) {
        //第一种解法
        int days = 10;
        int base_money = 2;
        int sum_money = (int)Math.pow(base_money,days-1);
        System.out.format("洪乞丐干10天，收入是%s元\n",sum_money);
        //第二种解法
        int sm = 0;
        for (int b = 1;b < 11;b++){
            if (b == 1){
                sm += b;
            }
            else {
                sm *= 2;
            }
        }
        System.out.println("洪乞丐干10天，收入是"+sm+"元");
    }
}

public static void main(String[] args) {
		int s=0,i;
		for(i=0;i<=9;i++) {
			s=s+(1<<i);
		}
		System.out.println(s);
	}

public class 乞丐要钱 {
    public static void main(String[] args) {
        int s=1;
        int v=1;
        for (int i = 0; i < 9; i++) {
            v*=2;
            s+=v;

            
        }
        System.out.println(s);
    }
}

public class WHILE02 {
	//while 循环和for 循环比较
	
	
	public static void main(String[] args) {
		
//			//
//		乞丐要钱
//		int total = 0;
//		int day;
//
//		day=1;
//	
//
//		while (day<=10) {
//			int n = (int) Math.pow(2, (day-1));
//			total = total + n;
//			day++;
//			
//		}
//		System.out.println("总钱数为:"+ total);
//		
//		
//	}
//	}
		
		//
		int total= 0;
		for (int i=1;i<11;i++) {
			total+= (int)Math.pow(2,(i-1));// 第i天的钱数为2^(i-1) 2的i-1次方
			
			
		}
		System.out.println("10天总钱数为:"+total);
		
		
	}
}

public static void main(String[] args) {
		//乞丐
		int sum = 1; //第一天的钱
		int c = 0;
		for(int i= 1;i<=9;i++) {
			sum = sum * 2;
			c = c+ sum;
		}	
		int q = c+1;
		System.out.println("干十天的收入是："+q);
	}

public class Hello8 {
    public static void main(String[] args) {
        int sum = 0;
        for(int i = 1; i <= 10; i++){
           int money = (int) Math.pow(2, i - 1) ;
           sum += money;
        }
        System.out.println("乞丐干10天收入" + sum);
    }
}