java中如何定义菜名和单价_JAVA基础语法练习项目—吃货联盟订餐管理系统

快来打我* 2022-11-10 00:53 175阅读 0赞

package cn.bdqn;

import java.util.Arrays;

import java.util.Scanner;

/\*\*

\* @author lalalalalamo

\* 吃货联盟订餐管理系统

\* @create 2020-03-06 12:32

\*/

public class OrderProject \{

public static void main(String\[\] args) \{

Scanner input = new Scanner(System.in);

//初始化菜品

String\[\] foodNames = \{"面条", "米饭", "饺子"\};

//初始化价格

double\[\] price = \{12.0, 15.0, 11.0\};

//初始化点赞

int\[\] praise = \{0, 0, 0\};

//定义一个空餐袋

String\[\]\[\] order = new String\[1\]\[6\];

//控制循环

boolean flag = true;

while (flag) \{

System.out.println("欢迎使用===吃货联盟订餐系统===");

System.out.println("\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*");

System.out.println("1.我要订餐！");

System.out.println("2.查看订单！");

System.out.println("3.签收订单！");

System.out.println("4.删除订单！");

System.out.println("5.我要点赞！");

System.out.println("6.退出系统！");

System.out.println("\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*");

System.out.print("请选择：");

int num = input.nextInt();

switch (num) \{

case 1:

System.out.println("我要订餐！");

System.out.print("请输入姓名：");

//订餐人姓名

String name = input.next();

System.out.println("序号" + "\\t" + "菜名" + "\\t" + "单价" + "\\t" + "点赞数");

for (int j = 0; j < foodNames.length; j++) \{

System.out.println((j + 1) + "\\t" + "\\t" + foodNames\[j\] + "\\t" + price\[j\] + "元" + "\\t " + praise\[j\]);

System.out.print("请选择你需要的菜品编号：");

int foodNum = input.nextInt();

if (foodNum <= 0 || foodNum > foodNames.length) \{

System.out.println("输入不正确，请重新输入！");

foodNum = input.nextInt();

\} else \{

System.out.print("请选择您需要的份数：");

int foodCount = input.nextInt();

System.out.print("请输入送餐时间(送餐时间是当天10：00到22：00之间)：");

int date = input.nextInt();

if (date < 10 || date > 20) \{

System.out.print("您输入有误，请重新输入！");

date = input.nextInt();

\} else \{

System.out.print("请输入送餐地址：");

String address = input.next();

System.out.println("订餐成功！");

System.out.println("您订的是：" + foodNames\[foodNum - 1\] + " " + foodCount + "份");

System.out.println("送餐时间：" + date + "点");

//餐费

double foodPrice = price\[foodNum - 1\] \* foodCount;

//所有总价 = 餐费+派送费

double foodPriceSum = 0;

if (foodPrice >= 50) \{

foodPriceSum = foodPrice;

System.out.println("餐费：" + foodPrice + " " + "派送费0.0元" + " " + "总计：" + foodPriceSum + "元");

\} else \{

foodPriceSum = foodPrice + 5.0;

System.out.println("餐费：" + foodPrice + " " + "派送费5.0元" + " " + "总计：" + foodPriceSum + "元");

if (order\[0\]\[0\] == null) \{

order\[0\]\[0\] = name;

order\[0\]\[1\] = foodNames\[foodNum - 1\] + " " + foodCount + "份";

order\[0\]\[2\] = date + "";

order\[0\]\[3\] = address;

order\[0\]\[4\] = foodPriceSum + "";

order\[0\]\[5\] = "已预定";

\} else \{

//当餐袋非空时，动态增加数组

order = Arrays.copyOf(order, order.length + 1);

//数组长度加一后 给下标最后一位赋值。下标=新的数组长度-1

order\[order.length - 1\] = new String\[6\];

order\[order.length - 1\]\[0\] = name;

order\[order.length - 1\]\[1\] = foodNames\[foodNum - 1\] + " " + foodCount + "份";

order\[order.length - 1\]\[2\] = date + "";

order\[order.length - 1\]\[3\] = address;

order\[order.length - 1\]\[4\] = foodPriceSum + "";

order\[order.length - 1\]\[5\] = "已预定";

System.out.print("输入0返回：");

int k = input.nextInt();

if (k == 0) \{

System.out.println("返回");

\} else \{

System.out.println("谢谢使用");

flag = false;

break;

case 2:

System.out.println("\*\*\*\*\*\*\*\*\*\*\*查看订单\*\*\*\*\*\*\*\*\*\*\*\*");

System.out.println("序号" + " " + "订餐人" + " " + "餐品信息" + " " + "送餐日期" + " " +

"送餐地址" + " " + "总金额" + " " + "订单状态");

for (int i = 0; i < order.length; i++) \{

System.out.print((i + 1) + " ");

for (int j = 0; j < order\[i\].length; j++) \{

System.out.print(order\[i\]\[j\] + "\\t" + "\\t");

System.out.println();

System.out.print("输入0返回：");

int h = input.nextInt();

if (h == 0) \{

System.out.println("返回");

\} else \{

System.out.println("谢谢使用");

flag = false;

break;

case 3:

System.out.println("\*\*\*\*\*\*\*\*\*\*\*签收订单\*\*\*\*\*\*\*\*\*\*\*\*");

System.out.print("请选择要签收的订单序号：");

int orderNum = input.nextInt();

if (orderNum > 0 && orderNum <= order.length) \{

order\[orderNum - 1\]\[5\] = "已完成";

System.out.println("订单签收成功！");

\} else \{

System.out.println("编号不正确！");

System.out.print("输入0返回：");

int w = input.nextInt();

if (w == 0) \{

System.out.println("返回");

\} else \{

System.out.println("谢谢使用");

flag = false;

break;

case 4:

System.out.println("\*\*\*\*\*\*\*\*\*\*\*删除订单\*\*\*\*\*\*\*\*\*\*\*\*");

System.out.print("请选择要删除的订单序号：");

int delNum = input.nextInt();

if (delNum > order.length || delNum <= 0) \{

System.out.println("编号不正确！");

\} else \{

//输入删除的编号 然后从编号开始 下一位依次往前一位顶，循环一遍

for (int i = delNum - 1; i < order.length - 1; i++) \{

order\[i\] = order\[i + 1\];

//复制一个新数组 其新长度=以前长度-已经被顶到最后一位的需要删除的那一项的一个长度

order = Arrays.copyOf(order, order.length - 1);

System.out.println("删除成功！");

System.out.print("输入0返回：");

int c = input.nextInt();

if (c == 0) \{

System.out.println("返回");

\} else \{

System.out.println("谢谢使用");

flag = false;

break;

case 5:

System.out.println("\*\*\*\*\*\*\*\*\*\*\*我要点赞\*\*\*\*\*\*\*\*\*\*\*\*");

System.out.println("序号" + "\\t" + "菜名" + "\\t" + "单价" + "\\t" + "点赞数");

for (int i = 0; i < foodNames.length; i++) \{

System.out.println((i + 1) + "\\t" + "\\t" + foodNames\[i\] + "\\t" + price\[i\] + "元" + "\\t" + praise\[i\]);

System.out.print("请选择您要点赞的菜品序号：");

int praiseNum = input.nextInt();

if (praiseNum > praise.length || praiseNum <= 0) \{

System.out.println("输入的编号不正确，请重新输入！");

praiseNum = input.nextInt();

\} else \{

praise\[praiseNum - 1\] = praise\[praiseNum - 1\] + 1;

System.out.println("点赞成功！");

System.out.print("输入0返回：");

int a = input.nextInt();

if (a == 0) \{

System.out.println("返回");

\} else \{

System.out.println("谢谢使用");

flag = false;

break;

case 6:

System.out.println("退出程序");

//退出程序

//System.exit(0);

//通过控制while循环的变量设置循环是否停止

flag = false;

break;

default:

System.out.println("你输入的不正确！");

java中如何定义菜名和单价_JAVA基础语法练习项目—吃货联盟订餐管理系统

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