庆丰包子铺自助点餐系统

　　这是个有意思的程序！里面的很多东西都可以修改哦，而且改完应该会很好玩，例如消费满５０元，就会在结账界面显示：“共消费：**元，土豪我们做朋友吧！”所卖的东西和价格可以随意初始化。

　　编写程序的时候还遇到了一个小问题，就是显示初始化菜单的界面的时候，名称如“猪肉大葱”四个字的那一行的价格与名称是三个字的价格对不齐，虽然我用的是制表符，然并卵啊，求高手解答撒！所以我对四个字的家伙做了针对处理才好的，但并不能一劳永逸。

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import java.util.Scanner;

 * 需求：制作庆丰包子铺点餐系统！

 * 1.开始界面：

 *             请您点餐：

 *             编号       名称       价格（元）

 *             1          素三鲜     2.5

 *             2          猪肉大葱   4.5

 *             3          牛肉白菜   6.0

 *             4          羊肉韭菜   7.0

 *             5          美味虾仁   9.0

 *             ---------------------------

 *             6          小米粥     3.5

 *             7          燕窝粥     6.5

 *             8          南瓜粥     4.0

 *

 * 2.温馨提示：点餐时，输入编号，输入0时结束点餐；输入-1时，可查看已点内容。

 * 3.结账界面：

 *            您点了：素三鲜*3   牛肉白菜*2 南瓜粥*1

 *             共消费：17.5元。

 *

 * 分析：定一三个数组，一个String类型，用于存菜单名称，一个double类型，用于存放对应菜单价格，一个int类型，用于存放点单编号个数。

 *             定义的方法有：控制输入方法、查询菜单、消费明细（菜单+消费）

 *

 *

 * @author Aaron Wang

 *

 */

class OrderMeal

{

            public static void main(String[] args)

            {

               QingFeng consumer = new QingFeng();

               consumer.orderStart();

            }

}

class QingFeng

{

            private String[] dishList = new String[]{"素三鲜","猪肉大葱","牛肉白菜","羊肉韭菜","美味虾仁","小米粥","燕窝粥","南瓜粥"};

            private double[] price = newdouble[]{1.5,3.5,5.0,7.0,9.0,2.5,4.5,3.0};

            private int[] ordered = new int[dishList.length];

 

            //软件启动界面(菜单价目表)--->代码块：给对象初始化

            {

               sop("编号      名称       价格（元）");

               for (int i=0; i

               {

                   if(i>0 && i<5)

                       sop(" "+(i+1)+"\t"+"\t"+dishList[i]+"\t"+price[i]);

                   else

                       sop(" "+(i+1)+"\t"+"\t"+dishList[i]+"\t"+"\t"+price[i]);

               }

            }

            //开始点单

            public void orderStart()

            {

               Scanner inputOrder = new Scanner(System.in);

               int orderNum = 0;

               sop("温馨提示：点餐时，输入编号，输入0时结束点餐；输入-1时，可查看已点内容。");

               sop("请您点餐：");

 

               //人机交互点餐

               while(true)

               {

                   orderNum=inputOrder.nextInt();

                   if(orderNum==0)//进入结账界面,并结束循环

                   {

                       payMoney();

                       break;

                   }

                   if(orderNum==-1)//查询已点菜单

                   {

                       printOrderedDish();

                   }

                   orderNum--;//自减1以匹配数组下标

                   if(orderNum>=0 && orderNum<8)//记录所点菜单

                       ordered[orderNum]++;

                   else

                       continue;  //忽略异常数字，继续点餐

               }

            }

            //打印消费金额

            public void printConsume()

            {

               double sum = 0;

               for (int i=0; i

               {

                   sum = sum+price[i]*ordered[i];

               }

               if (sum==0)

               {

                   sop("你没点吃的哦~");

               }

               else if(sum>50)

                   sop("共消费："+sum+"元,土豪我们做朋友吧！");

               else

                   sop("共消费："+sum+"元");

            }

            //打印消费菜单列表

            public void printOrderedDish()

            {

               sop("您点了：");

               for (int i=0; i

               {

                   if (ordered[i]!=0)

                   {

                       sop(dishList[i]+"×"+ordered[i]+"份");

                   }

               }

               sop("---------------------------");

            }

            //显示菜单清单及消费，结账界面

            public void payMoney()

            {

               sop("---------------------------");

               printOrderedDish();

               printConsume();

            }

            public  void sop(Object obj)

            {

               System.out.println(obj);

            }

}

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