1 package com.eat;  2   3 import java.util.Scanner;  4   5 public class EatSystem {  6     public static void main(String[] args) {  7         Scanner sc = new Scanner(System.in);  8         System.out.println("欢迎使用“吃货联盟订餐系统”");  9         String choose = "";//菜单选择的变量 10         //初始化数据 11         int length = 5; 12         String[] names = new String[length];//订餐人 13         String[] descs = new String[length];//订单餐品信息 14         int[] dates =new int[length];//送餐日期 15         String[] addresses = new String[length];//送餐地址 16         double[] moneys = new double[length];//总价 17         boolean[] status = new boolean[length];//订餐状态:true：完成；false未完成 18         int[] nums = new int[length];//订餐数量 19         double[] prices = new double[10];//单价 20         String[] foods = new String[10];//菜品信息 21         int[] zan = new int[10];//点赞数量 22         zan[0] = 12;zan[2] = 5;zan[4]=25; 23         foods[0] = "黄焖鸡";foods[1] = "东坡肉";foods[2] = "蛋炒饭";foods[3] = "北京烤鸭";foods[4] = "大肘子"; 24         prices[0] = 16.0;prices[1] = 15.5;prices[2] = 8.0;prices[3] = 49.9;prices[4] = 18.8; 25         //初始化两条信息 26         names[0] = "张三"; 27         descs[0] = "黄焖鸡"; 28         nums[0] = 2; 29         moneys[0] = 32.0; 30         dates[0] = 7; 31         addresses[0] = "北京路18号"; 32         status[0] = true; 33  34         names[1] = "李四"; 35         descs[1] = "东坡肉"; 36         nums[1] = 3; 37         moneys[1] = 46.5; 38         dates[1] = 8; 39         addresses[1] = "北京路18号"; 40         status[1] = false; 41  42         do { 43             System.out.println("******************************"); 44             System.out.println("1、我要订餐  2、查看餐袋  3、签收订单  4、删除订单  5、我要点赞  6、退出系统"); 45             System.out.println("请选择:"); 46             choose = sc.next(); 47             switch (choose) { 48             case "1": 49                 System.out.println("****我要订餐****"); 50                 int index = -1;//定义要添加的位置下标 51                 for(int i = 0 ;i
     
      max) { 76                             System.out.println("不存在此编号菜品，请重新输入:"); 77                         } 78                     } while (id<1||id>max); 79                     descs[index] = foods[id-1]; 80                     System.out.println("请选择您需要的份数:"); 81                     int num = sc.nextInt(); 82                     nums[index] = num; 83                     System.out.println("请输入送餐时间（送餐时间是10点至20点间整点送餐）"); 84                     int date = 0; 85                     do { 86                         date = sc.nextInt(); 87                         if(date<10||date>20) { 88                             System.out.println("您的输入有误，请输入10~20间的整数！:"); 89                         } 90                     } while (date<10||date>20); 91                     dates[index] = date; 92                     System.out.println("请输入送餐地址："); 93                     addresses[index] = sc.next(); 94                     double money = prices[id-1]*num; 95                     System.out.println("订餐成功:"); 96                     System.out.println("您订的是："+foods[id-1]+" "+num+"份"); 97                     System.out.println("送餐时间："+date+"点"); 98                     double song = 0.0; 99                     if(money<20) {100                         song = 3.0;101                     }102                     moneys[index] = money+song;103                     System.out.println("餐费:"+money+"。送餐费："+song+"元,总计:"+(money+song)+"元");104                 }105 106                 break;107             case "2":108                 System.out.println("****查看餐袋****");109                 System.out.println("序号\t订餐人\t餐品信息\t\t送餐日期\t\t送餐地址\t\t总金额\t订单状态");110                 for(int i = 0;i
      
       descs.length) {127                         isTrue = true;128                     }else {129                         if(descs[id-1]==null) {130                             isTrue = true;131                         }else {132                             isTrue = false;133                         }134                     }135 136                     if(isTrue) {137                         System.out.println("不存在此编号的订单信息,请重新输入:");138                     }139                 } while (isTrue);140                 status[id-1] = true;141                 System.out.println("签收完成");142                 break;143             case "4":144                 System.out.println("****删除订单****");145                 System.out.println("请输入要删除的订单编号:");146                 int big = length;147                 for(int i = 0;i
       
        big) {158                         System.out.println("不存在此编号菜品，请重新输入:");159                     }160                 } while (no<1||no>big);161 162                 if(status[no-1]==false) {163                     System.out.println("订单未完成，不能删除");164                 }else {165                     for(int i=no-1;i
        
         max) {201                         System.out.println("不存在此编号菜品，请重新输入:");202                     }203                 } while (bianhao<1||bianhao>max);204                 zan[bianhao-1]++;205                 System.out.println("点赞成功，谢谢您的反馈");206                 break;207             case "6":208                 System.out.println("****退出系统****");209                 System.out.println("谢谢使用");210                 break;211 212             default:213                 System.out.println("选择错误，请重新选择:");214                 choose = sc.next();215                 break;216             }217         }while(!"6".equals(choose));218     }219 }
        
       
      
     

基础知识综合运用