第九章1

package com.myProject.demo;
import java.util.Scanner;
public class firstProject {
public static void main(String[] args) {
String[] name = new String[4]; // 保存订餐人姓名
String[] dishMegs = new String[] { "红烧带鱼", "鱼香肉丝", "时令鲜蔬" }; // 保存所选信息，菜品名
double[] prices = new double[] { 38.0, 20.0, 10.0 }; // 菜品单价
int[] times = new int[4]; // 保存送餐时间
String[] addresses = new String[4]; // 保存送餐地址
int[] states = new int[4]; // 保存订单状态：0表示已预订，1表示已完成。
double[] sumPrices = new double[4]; // 保存订单的总金额
int[] praiseNums = new int[3]; // 点赞数
System.out.println("欢迎来到“吃货联盟订餐系统”");
int num = -1; // 初始化用户输入的数值，用户输入0返回主菜单，否则退出系统。
boolean isExit = false; // 标志用户是否退出系统：true为退出系统。
do {
System.out.println("**********************************************\n");
System.out.println("1、我要订餐\n2、查看餐袋\n3、签收订单\n4、删除订单\n5、我要点赞\n6、退出系统");
System.out.println("**********************************************\n");
Scanner input = new Scanner(System.in);
System.out.print("请选择：");
int choose = input.nextInt(); // 记录用户选择的功能编号
switch (choose) {
case 1:
// 我要订餐
System.out.println("***我要订餐***");
boolean isAdd = false;
for (int i = 0; i < name.length; i++) {
if (name[i] == null) {
System.out.print("请输入订餐人姓名：");
String names = input.next();
System.out.println("序号\t菜名\t单价\t点赞数");
for (int j = 0; j < dishMegs.length; j++) {
String praiseNum = (praiseNums[j]) > 0 ? praiseNums[j] + "赞" : "0";
System.out.println((j + 1) + "\t" + dishMegs[j] + "\t" + prices[j] + "\t" + praiseNum);
}
// 用户点菜
System.out.print("请选择您要点的菜品编号：");
int chooseDish = input.nextInt();
System.out.print("请选择您需要的份数：");
int number = input.nextInt();
String dishMeg = dishMegs[chooseDish - 1] + " " + number + "份";
double sumPrice = prices[chooseDish - 1] * number;
double deliCharge = (sumPrice >= 50) ? 0 : 5;
System.out.print("请输入送餐时间（送餐时间是10点至20点间整点送餐）:");
int time = input.nextInt();
while (time < 10 || time > 20) {
System.out.println("您的输入有误，请输入10~20间的整数！");
time = input.nextInt();
}
System.out.println("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：" + dishMeg);
System.out.println("送餐时间：" + time + "点");
System.out.println(
"餐费：" + sumPrice + "元，送餐费" + deliCharge + "元，总计：" + (sumPrice + deliCharge) + "元。");
name[i] = names;
dishMegs[i] = dishMeg;
times[i] = time;
addresses[i] = address;
sumPrices[i] = sumPrice + deliCharge;
break;
}
if (!isAdd) {
System.out.println("对不起，您的餐袋已满！");
}
}
break;
case 2:
// 查看餐袋
System.out.println("***查看餐袋***");
System.out.println("序号\t订餐人\t餐品信息\t\t送餐日期\t送餐地址\t\t总金额\t订单状态");
for (int i = 0; i < name.length; i++) {
if (name[i] != null) {
String state = (states[i] == 0) ? "已预订" : "已完成";
String date = times[i] + "日";
String sumPrice = sumPrices[i] + "元";
System.out.println((i + 1) + "\t" + name[i] + "\t" + dishMegs[i] + "\t" + date + "\t"
+ addresses[i] + "\t\t" + sumPrice + "\t" + state);
}
}
break;
case 3:
// 签收订单
System.out.println("***签收订单***");
boolean isSignFind = false; // 找到要签收的订单
System.out.print("请选择要签收的订单序号：");
int signOrderId = input.nextInt();
for (int i = 0; i < name.length; i++) {
if (name[i] != null && states[i] == 0 && signOrderId == i + 1) {
states[i] = 1;
System.out.println("订单签收成功！");
isSignFind = true;
} else if (name[i] != null && states[i] == 1 && signOrderId == i + 1) {
System.out.println("您选择的订单已完成签收，不能再次签收!");
isSignFind = true;
}
}
if (isSignFind) {
System.out.println("您选择的订单不存在！");
}
break;
case 4:
// 删除订单
System.out.println("***删除订单***");
System.out.print("请输入要删除的订单序号：");
int delid = input.nextInt();
for (int i = 0; i < name.length; i++) {
if (name[i] != null && states[i] == 1) {
name[delid - 1] = name[delid];
dishMegs[delid - 1] = dishMegs[delid];
times[delid - 1] = times[delid];
addresses[delid - 1] = addresses[delid];
states[delid - 1] = states[delid];
sumPrices[delid - 1] = sumPrices[delid];
// 最后清零
int index = name.length - 1;
name[index] = null;
dishMegs[index] = null;
times[index] = 0;
addresses[index] = null;
states[index] = 0;
sumPrices[index] = 0;
System.out.println("删除订单成功！");
break;
} else if (name[i] != null && states[i] == 1) {
System.out.println("你的订单未签收，不能删除！");
break;
} else {
System.out.println("你要删除的订单不存在！");
}
}
break;
case 5:
// 我要点赞
System.out.println("***我要点赞***");
System.out.println("序号" + "\t" + "菜名" + "\t" + "单价");
for (int i = 0; i < dishMegs.length; i++) {
String price = prices[i] +"元";
String priaiseNum = (praiseNums[i])>0?praiseNums[i] +"赞":"";
System.out.println((i+1)+"\t"+dishMegs[i]+"\t"+price+"\t"+priaiseNum);
}
System.out.print("请选择您要点赞的菜品序号：");
int priaiseNum = input.nextInt();
praiseNums[priaiseNum-1]++;
System.out.println("点赞成功！");
break;
case 6:
// 退出系统
isExit = true;
break;
default:
System.out.println("对不起，没有这个选项！");
break;
}
if (isExit == false) {
System.out.print("输入0时返回：");
num = input.nextInt();
} else {
System.out.println("欢迎下次再来！");
break;
}
} while (num == 0);
}
}

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