一只死宅的Java作业（1）

作业1：实现一个数字加密器，加密规则是：加密结果 = （整数*10+5）/2 + 3.14159，加密结果仍为一整数。

详细代码：

package com.bbb.Work.cc;

import java.util.Scanner;

public class W1 {

   public static void main(String[] args) {
       // TODO Auto-generated method stub
Scanner sc=new Scanner(System.in);
System.out.println("请输入一个是数字：");
int d=sc.nextInt();
int result=(d*10+5)/2+(int)3.14159;
System.out.println(result);
   }

}

运行截图：

一只死宅的Java作业（1）

作业二：

训练要点：运算符（*、=）的使用从控制台输出信息需求说明：用户可以享受购物8折的优惠，请计算实际消费金额

实现思路：

1、创建Java类Pay

2、在Pay.java文件中声明变量存储信息

3、计算总金额难点指导：消费总额 = 各商品的消费金额之和 * 折扣

作业三：

需求说明：结算时打印购物小票计算此次购物获得的会员积分

作业四：

训练要点：运算符（%、/）的使用使用Scanner类接收用户输入

需求说明：商场推出幸运抽奖活动根据抽奖规则计算会员卡号各位数字之和

实现思路：

1、接收输入的会员卡号

2、分解获得各位数字

3、计算各位数字之和难点指导：分解获得各位数字

作业5：

需求说明：从控制台输入基本工资，并计算输出实领工资

详细代码：（估计是我吃多了闲的把后面四个作业合到一起写了而且还好像写错了）

package com.gump.buy;

import java.util.ArrayList;
import java.util.List;
import java.util.Scanner;

public class Buy {

public static final double Discount = 0.8;

public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);

       List<Goods> goodsList = new ArrayList<>();
       goodsList.add(new Goods("T恤", 245));
       goodsList.add(new Goods("网球鞋", 570));
       goodsList.add(new Goods("网球拍", 320));
       goodsList.add(new Goods("乒乓球", 10));
       goodsList.add(new Goods("足球", 100));
       goodsList.add(new Goods("篮球", 120));

List<GoodsItem> goodsItemList = new ArrayList<>();

       while (true) {
           for (int i = 0; i < goodsList.size(); i++) {
               Goods goods = goodsList.get(i);
               System.out.printf("%d.\t%-10s\t￥%.2f\r\n", i + 1, goods.getName(), goods.getPrice());
           }
           System.out.printf("请选择要购买的商品（输入0结束选择）：");
           int idx = scanner.nextInt();
           if (idx == 0 || idx > goodsList.size()) {
               break;
           }
           Goods goods = goodsList.get(idx - 1);

           System.out.printf("请输入要购买的%s数量：", goods.getName());
           int count = scanner.nextInt();
           goodsItemList.add(new GoodsItem(goods, count));
       }
       System.out.println();

       double totalMoney = 0;
       System.out.print("**************************消费单**************************\r\n");
       System.out.printf("%-10s\t%-10s\t%-10s\t%-10s\r\n", "购买物品", "单价", "个数", "金额");
       for (int i = 0; i < goodsItemList.size(); i++) {
           GoodsItem item = goodsItemList.get(i);
           double money = item.getGoods().getPrice() * item.getCount();
           System.out.printf("%-10s\t￥%-10.2f\t%-10d\t￥%-10.2f\r\n", item.getGoods().getName(),
                   item.getGoods().getPrice(), item.getCount(), money);
           totalMoney += money;
       }
       totalMoney *= Discount;
       System.out.print("**********************************************************\r\n\r\n");

System.out.printf("%-10s\t%.1f\r\n", "折扣：", Discount * 10);
System.out.printf("%-10s\t￥%.2f\r\n", "消费总金额：", totalMoney);

       double payMoney = 0;
       while (true) {
           System.out.print("请输入交费金额：");
           payMoney = scanner.nextDouble();
           if (payMoney < totalMoney) {
               System.out.println("交费金额不足");
           } else {
               break;
           }
       }

System.out.printf("%-10s\t￥%.2f\r\n", "找钱：", payMoney - totalMoney);

scanner.close();
}

}

package com.bbb.Work.cc;

public class Lucky {
public static int l=Buy.q/1000;
public static int m=Buy.q/100%10;
public static int n=Buy.q/10%10;
public static int o=Buy.q%10;
public static int p=l+m+n+o;

}

package com.bbb.Work.cc;

public class Pay {
static double shirt=245;
static double shoes=570;
static double pat=320;
static double zk=0.8;
static double zall=(shirt*Buy.shirtnum+shoes*Buy.shoesnum+pat*Buy.patnum)*zk;
}

package com.bbb.Work.cc;

public class salary {
static double wj=1200.0;
static double fz=750.0;
static double xs=Buy.s+wj+fz;

}
一只死宅的Java作业（1）

下面是大佬写的（只有作业2和3的我还有很多要学习的东西）

package com.gump.buy;

import java.util.ArrayList;
import java.util.List;
import java.util.Scanner;

public class Buy {

public static final double Discount = 0.8;

public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);

List<GoodsItem> goodsItemList = new ArrayList<>();

System.out.printf("%-10s\t%.1f\r\n", "折扣：", Discount * 10);
System.out.printf("%-10s\t￥%.2f\r\n", "消费总金额：", totalMoney);

System.out.printf("%-10s\t￥%.2f\r\n", "找钱：", payMoney - totalMoney);

scanner.close();
}

}

package com.gump.buy;

public class Goods {

private String name;

private double price;

   public Goods(String name, double price) {
       this.name = name;
       this.price = price;
   }

   public String getName() {
       return name;
   }

   public double getPrice() {
       return price;
   }
}

package com.gump.buy;

public class GoodsItem {

private Goods goods;

private int count;

   public GoodsItem(Goods goods, int count) {
       this.goods = goods;
       this.count = count;
   }

   public Goods getGoods() {
       return goods;
   }

   public int getCount() {
       return count;
   }

   public void setCount(int count) {
       this.count = count;
   }

}
大佬的运行截图：

一只死宅的Java作业（1）