[code=java]
package cn.practice1200;
import java.util.Scanner;
public class Eater_Alliance {
/**
* 喫貨聯盟訂餐系統
*
* @author QCD
* @param args
*/
public static void main(String[] args) {
// TODO Auto-generated method stub
Scanner input = new Scanner(System.in);
// 初始化3個數組存儲菜品、價格、點贊數
String[] dishNames = { "苦瓜炒雞蛋", "紅燒排骨", "辣子雞丁", "石鍋魚", "麻婆豆腐" };
double[] prices = { 15.0, 30.0, 35.0, 90.0, 20.0 };
int[] praiseNums = new int[5];
// 在初始化6個數組用於存儲訂單信息
String[] names = new String[5];// 保存訂餐人姓名
String[] dishMegs = new String[5];// 保存所選菜品名
int[] dishNums = new int[5];// 保存所選菜品份數
int[] times = new int[5];// 保存送餐時間
String[] addresses = new String[5];// 保存送餐地址
int[] states = new int[5];// 保存訂單狀態：0表示已預訂，1表示已完成
double[] sumPrices = new double[5];// 保存訂單的總金額
// 初始化2條訂單信息
// 第1條
names[0] = "王大錘";
dishMegs[0] = "辣子雞丁";
dishNums[0] = 2;
times[0] = 12;
addresses[0] = "莞太路3號";
states[0] = 0;
sumPrices[0] = 70.0;
// 第2條
names[1] = "王大柱";
dishMegs[1] = "麻婆豆腐";
dishNums[1] = 1;
times[1] = 19;
addresses[1] = "建設路2號";
states[1] = 1;
sumPrices[1] = 25.0;
/* 實現菜單切換 */
System.out.println("歡迎使用“喫貨聯盟訂餐系統”");
int num = 1;// 用戶輸入0返回主菜單否則退出系統
boolean isExit = false;// 標記用戶是否退出系統，true爲退出
// 循環控制用戶輸入選擇並執行
do {
System.out.println("************************");
System.out.println("1、我要訂餐");
System.out.println("2、查看餐袋");
System.out.println("3、簽收訂單");
System.out.println("4、刪除訂單");
System.out.println("5、我要點贊");
System.out.println("6、退出系統");
System.out.println("************************");
System.out.print("請選擇：");
num = input.nextInt();// 用戶輸入所要選擇進行的操作
/* 使用switch結構來建立選擇內容 */
switch (num) {
case 1:// 我要訂餐
System.out.println("***我要訂餐***");
boolean isAdd = false;// 記錄是否可以點餐
for (int i = 0; i < names.length; i++) {
if (names[i] == null) {
isAdd = false;
System.out.print("請輸入訂餐人姓名：");
String name = input.next();
System.out.println("序號" + "\t" + "菜名" + "\t\t" + "單價" + "\t" + "點贊數");
for (int j = 0; j < dishNames.length; j++) {
System.out.println(
(j + 1) + "\t" + dishNames[j] + "\t\t" + prices[j] + "元" + "\t" + praiseNums[j]);
}
System.out.print("請選擇您要點的菜品編號：");
int chooseDish = input.nextInt();
String dishMeg = dishNames[chooseDish - 1];
System.out.print("請選擇您需要的份數：");
int number = input.nextInt();
System.out.print("請輸入送餐時間（送餐時間是10點至20點間整點送餐）：");
int time = input.nextInt();
while (time < 10 || time > 20) {
System.out.print("您的輸入有誤，請輸入10-20間的整數");
time = input.nextInt();
}
System.out.print("請輸入送餐地址：");
String address = input.next();
// 默認可以預定，不用寫訂單狀態
System.out.println("訂餐成功！");
System.out.println("您定的是：" + dishNames[chooseDish - 1] + number + "份");
System.out.println("送餐時間：" + time + "點");
double sumPrice = prices[chooseDish - 1] * number;// 計算餐費
double sendMoney = (sumPrice >= 50) ? 0 : 5;// 計算送餐費
System.out.println("餐費：" + sumPrice + "元，" + "送餐費" + sendMoney + "元，" + "總計："
+ (sumPrice + sendMoney) + "元。");
// 添加數據
names[i] = name;
dishMegs[i] = dishMeg;
times[i] = time;
dishNums[i] = number;
addresses[i] = address;
sumPrices[i] = sumPrice + sendMoney;
break;
}
if (isAdd) {
System.out.println("對不起，您的餐袋已滿！");
}
}
break;
case 2:// 查看餐袋
System.out.println("***查看餐袋***");
System.out.println("序號\t訂餐人\t餐品名稱\t餐品數量\t送餐時間\t送餐地址\t總金額\t訂單狀態");
for (int i = 0; i < names.length; i++) {
if (names[i] != null) {
String state = (states[i] == 0) ? "已預訂" : "已完成";
System.out.println((i + 1) + "\t" + names[i] + "\t" + dishMegs[i] + "\t" + dishNums[i] + "份"
+ "\t" + times[i] + "\t" + addresses[i] + "\t" + sumPrices[i] + "元" + "\t" + state);
}
}
break;
case 3:// 簽收訂單
System.out.println("***簽收訂單***");
boolean isSignFind = false;
System.out.print("請選擇要簽收的訂單序號：");
int sign = input.nextInt();
for (int i = 0; i < names.length; i++) {
if (names[i] != null && states[i] == 0 && sign == i + 1) {
states[i] = 1;
System.out.println("訂單簽收成功！");
isSignFind = true;// 標記已找到的訂單
} else if (names[i] != null && states[i] == 1 && sign == i + 1) {
System.out.println("您選擇的訂單已完成簽收，不能再次簽收！");
isSignFind = true;// 標記已找到的訂單
}
}
if (!isSignFind) {
System.out.println("您選擇的訂單不存在！");
}
break;
case 4:// 刪除訂單
System.out.println("***刪除訂單***");
boolean isDelFind = false;
System.out.print("請輸入要刪除的訂單序號：");
int delID = input.nextInt();
for (int i = 0; i < names.length; i++) {
// 根據狀態值判斷能不能刪除，只有已完成的才能刪除
if (names[i] != null && states[i] == 1 && delID == i + 1) {
isDelFind = true;
for (int j = delID - 1; j < names.length - 1; j++) {
names[j] = names[j + 1];
dishMegs[j] = dishMegs[j + 1];
dishNums[j] = dishNums[j + 1];
times[j] = times[j + 1];
addresses[j] = addresses[j + 1];
states[j] = states[j + 1];
sumPrices[j] = sumPrices[j + 1];
}
// 將最後一位清空
names[names.length - 1] = null;
dishMegs[names.length - 1] = null;
dishNums[names.length - 1] = 0;
times[names.length - 1] = 0;
addresses[names.length - 1] = null;
states[names.length - 1] = 0;
sumPrices[names.length - 1] = 0;
System.out.println("刪除訂單成功！");
break;
} else if (names[i] != null && states[i] == 0 && delID == i + 1) {
isDelFind = true;
System.out.println("您選擇的訂單未簽收，不能刪除！");
break;
}
} // 未找到的訂單不能刪除
if (!isDelFind) {
System.out.println("您要刪除的訂單不存在！");
}
break;
case 5:// 我要點贊
System.out.println("***我要點贊***");
// 顯示菜品信息
System.out.println("序號\t菜名\t單價");
for (int i = 0; i < dishNames.length; i++) {
String priaiseNum = (praiseNums[i] > 0) ? praiseNums[i] + "贊" : "";
System.out.println((i + 1) + "\t" + dishNames[i] + "\t" + prices[i] + "元" + priaiseNum);
}
System.out.print("請選擇您要點讚的菜品序號：");
int number = input.nextInt();
praiseNums[number - 1]++;
System.out.println("點贊成功");
break;
case 6:// 退出系統
isExit = true;
break;
default:// 退出系統
isExit = true;
break;
}
// 返回主界面
if (!isExit) {
System.out.print("輸入0返回：");
num = input.nextInt();
} else {
break;
}
} while (num == 0);
System.out.println("謝謝惠顧，歡迎您再次使用！");
input.close();
}
}
[/code]
