import java.util.Scanner;
public class Demo {
public static void main(String[] args) {
Scanner input = new Scanner(System.in);
// 订餐人姓名
String[] names = new String[4];
// 菜品名及份数
String[] dishMegs = new String[4];
// 菜品信息
String[] dishNames = { “红烧带鱼”, “鱼香肉丝”, “时令蔬菜” };
// 菜品单价
double[] prices = { 38, 20, 10 };
// 点赞数
int[] praiseNums = new int[3];
// 送餐时间
int[] times = new int[4];
// 送餐地址
String[] addresses = new String[4];
// 订单状态 ：0表示已预定，1表示已完成
int[] states = new int[4];
// 订单金额
double[] sumPrices = new double[4];
names[0] = “张晴”;
dishMegs[0] = “红烧带鱼2份”;
times[0] = 12;
addresses[0] = “天成路207号”;
sumPrices[0] = 76.0;
states[0] = 1;
names[1] = "张晴";
dishMegs[1] = "鱼香肉丝2份";
times[1] = 18;
addresses[1] = "天成路207号";
sumPrices[1] = 45.0;
states[1] = 0;
boolean isExit = false;// 是否退出系统
int num = -1;// 输入0返回，否则退出
System.out.println("欢迎使用“吃货联盟订餐系统”");
do {
System.out.println("*************************************");
System.out.println("1、我要订餐");
System.out.println("2、查看餐袋");
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.println("请选择：");
int choose = input.nextInt();
switch (choose) {
case 1:
System.out.println("***我要订餐***");
boolean isAdd = false;// 记录是否可以订餐
for (int i = 0; i < names.length; i++) {
if (names[i] == null) {
isAdd = true;
System.out.println("请输入订餐人姓名：");
String name = input.next();
System.out.println("序号" + "\t" + "菜名\t单价\t点赞数");
for (int j = 0; j < dishNames.length; j++) {// 菜品名
String price = prices[j] + "元";// 单价
// 点赞数
String praiseNum = praiseNums[j] > 0 ? praiseNums[i]
+ "赞"
: "0";
System.out.println((j + 1) + "\t" + dishNames[j]
+ "\t" + price + "\t" + praiseNum);
}
System.out.println("请选择你需要的菜品编号：");
int chooseDish = input.nextInt();
System.out.println("请选择你需要的份数：");
int number = input.nextInt();
// 菜品名和订餐份数
String dishMeg = dishNames[chooseDish - 1] + ""
+ number + "份";
// 订餐钱数
double sumPrice = prices[chooseDish - 1] * number;
double deliCharge = sumPrice >= 50 ? 0 : 5;// 餐费满50元不需要餐费，否则5元餐费
System.out.println("请输入送餐时间(送餐时间是10点至20点间的整点送餐：)");
int time = input.nextInt();
while (time < 10 || time > 20) {
System.out.println("您输入有误，请输入10点至20点间的整数！");
time = input.nextInt();
}
System.out.println("请输入送餐地址：");
String adress = input.next();
// 订餐状态默认为0
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");
// 将信息添加到数组中
names[i] = name;
dishMegs[i] = dishMeg;
times[i] = time;
addresses[i] = adress;
sumPrices[i] = sumPrice + deliCharge;
break;
}
}
if (!isAdd) {
System.out.println("对不起， 餐袋已满！");
}
break;
case 2:
System.out.println("***查看餐袋***");
System.out.println("序号\t订餐人\t餐品信息\t\t送餐时间\t送餐地址\t\t总金额\t订单状态");
for (int i = 0; i < names.length; i++) {
if (names[i] != null) {
// 预定是否完成
String state = (states[i] == 0) ? "已预定" : "已完成";
// 时间
String date = times[i] + "点";
// 总金额
String sumPrice = sumPrices[i] + "元";
System.out
.println((i + 1) + "\t" + names[i] + "\t"
+ dishMegs[i] + "\t" + date + "\t"
+ addresses[i] + "\t" + sumPrice + "\t"
+ state);
}
}
break;
case 3:
System.out.println("***签收订单***");
System.out.println("请输入订单编号：");
int chooseNum = input.nextInt();
for (int i = 0; i < names.length; i++) {
if (chooseNum < names.length-1&&chooseNum>=0) {
if (names[i] != null && states[i] == 0
&& chooseNum == i + 1) {
states[i] = 1;
System.out.println("签收成功！");
} else if (names[i] != null && states[i] == 1
&& chooseNum == i + 1) {
System.out.println("不能重复签收！");
}
} else {
System.out.println("订单号不存在！");
break;
}
}
break;
case 4:
System.out.println("***删除订单***");
boolean isDelFind = false;// 标记是否找到要删除的订单
System.out.println("请输入要删除的订单号：");
int delId = input.nextInt();
for (int i = 0; i < names.length; i++) {
// 订单为已完成，序号为用户输入的订单序号减1，可删除
// 订单为已预定，序号为用户输入的订单序号减1，不可删除
if (names[i] != null && states[i] == 1 && delId == i + 1) {
isDelFind = true;// 标记为已找到此订单
// 执行删除操作，删除位置后的元素依次前移
for (int j = delId - 1; j < names.length - 1; j++) {
names[j] = names[j + 1];
dishMegs[j] = dishMegs[j + 1];
times[j] = times[j + 1];
addresses[j] = addresses[j + 1];
states[j] = states[j + 1];
sumPrices[j] = sumPrices[j + 1];
}
// 最后一位清空
int endIndex = names.length - 1;
names[endIndex] = null;
dishMegs[endIndex] = null;
times[endIndex] = 0;
addresses[endIndex] = null;
states[endIndex] = 0;
sumPrices[endIndex] = 0;
System.out.println("删除成功！");
break;
} else if (names[i] != null && states[i] == 0
&& delId == i + 1) {
System.out.println("您选择的订单未签收，不能删除！");
isDelFind = true;// 标记已找到订单
break;
}
}
// 未找到该序号的订单，不能删除
if (!isDelFind) {
System.out.println("您需要删除的订单不存在！");
}
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 < dishNames.length; i++) {// 菜品名
String price = prices[i] + "元";// 单价
// 点赞数
String praiseNum = praiseNums[i] > 0 ? praiseNums[i] + "赞"
: "0";
System.out.println((i + 1) + "\t" + dishNames[i] + "\t"
+ price + "\t" + praiseNum);
}
System.out.println("请选择你要点赞的菜品序号：");
int priaiseNum = input.nextInt();
praiseNums[priaiseNum - 1]++;// 点赞数加1
System.out.println("点赞成功！");
break;
case 6:
isExit = true;
System.out.println("欢迎下次使用！");
break;
default:
System.out.println("输入错误，请重新选择！");
continue;
}
if (!isExit) {
System.out.println("输入0返回：");
num = input.nextInt();
if (num == 0) {
isExit = false;
} else {
System.out.println("输入错误，程序退出！");
break;
}
} else {
isExit = false;
break;
}
} while (!isExit);
}
}