"Food alliance ordering system"

“ Food alliance ordering system ” Requirement specification

  Now we have entered the network era , Online shopping 、 Watch the news 、 Making friends and other people's daily life has been inseparable from the network .“ Just point your fingers , Can deliver meals to the door ”, Ordering meals online is becoming more and more popular among urban young people     Now we are developing an online ordering system , Its specific functions are as follows ：

• I want to order

       Complete the user's order , Each order contains the following information ：

         Name of the orderer ： Ask the user to enter

         Choose dishes and servings ： Display three menu serial numbers 、 name 、 The unit price 、 Number of likes , Prompt the user to enter the serial number and number of dishes to be selected

         Delivery time ： Request the same day 10 To 20 The meal is delivered at one o'clock , Ask the user to enter 10~20 The integer of , Input error , Repeat input .

         Delivery address ： Ask the user to enter

         state ： Two kinds of state ：0： It has been booked （ Default state ） 1、 Completed （ The order has been signed ）

         Total sum ：

    Total sum = Unit price of dishes * Additional copies - Meal delivery fee

   （ Meal delivery fee ： When the amount of a single order reaches 50 Yuan time , Free meals , otherwise , To be paid 6 RMB free meals ）

  After ordering successfully , Display order information .

•   Check the order

        Traversal shows that there are orders

        The content includes ： Serial number 、 Name of the orderer 、 Ordering information （ The name of the dish and the number of servings ）、 Delivery time 、 Delivery address 、  state （ Scheduled or completed ）、 Total sum

•   Sign the order

        Change the status of the order to completed

• Delete order

    The user enters the order number , If the order of this serial number is completed , You can delete , Give corresponding prompt information in other cases

• I want to like

        Display the sequence number of dishes 、 Dish name 、 The unit price 、 Number of likes , Prompt the user to enter the sequence number of the dishes you like to complete the likes of the dishes .

• Exit the system

Exit the whole system , Show “ Thank you for using. , looking forward to your next visit ”.

• Menu switching

According to the displayed main menu , Enter the function number to execute the corresponding function , When the input 1~5 when , Perform corresponding functions （ Pictured 1 Shown ）.

  

 

                    chart 1 Input 1~5 Function number between , Perform corresponding functions

Such as the input 6 Or other numbers , Exit the system （ Pictured 2 Shown ）.

chart 2  Input “6” Or other numbers , Exit the system

When user input 1~5 Function number between , When the function is finished , Show “ Input 0 return ”（ Pictured 1 Shown ）, When the input 0, Then return to the main menu （ Pictured 3 Shown ）, otherwise , Exit the system

chart 3  Input “0” Back to main menu

Code implementation ：

package com.hmy.ordering;

import java.util.Scanner;


public class OrderingMsg {
	public static void main(String[] args) {
		// Data subject , A set of order information 
		String[] names = new String[4];// The orderer 
		String[] dishMegs = new String[4];// Ordering information 
		int[] times = new int[4];// Delivery time 
		String[] addresses = new String[4];// Delivery address 
		int[] states = new int[4];// The order status ：0 Indicates that you have booked ,1 Indicates completed 
		double[] sumPrices = new double[4];// Total sum 
		
		// Initialize two order information 
		names[0] = " Chihiro ";
		dishMegs[0] = " Yu-Shiang Shredded Pork  1 Share ";
		times[0] = 12;
		addresses[0] = " Hefei one yuan ";
		states[0] = 1;
		sumPrices[0] = 24.0;//18.0+6
		
		names[1] = " Chihiro ";
		dishMegs[1] = " Braised Hairtail in Brown Sauce  2 Share ";
		times[1] = 12;
		addresses[1] = " Peking blue bird ";
		states[1] = 0;
		sumPrices[1] = 76.0;//38.0*2
		
		// Data subject , A set of food information 
		String[] dishNames = {" Braised Hairtail in Brown Sauce ", " Yu-Shiang Shredded Pork ", " vegetables in season "};
		double[] prices = {38.0, 18.0, 10.0};
		int[] praiseNums = new int[3];
		
		int num = -1;// Record the number entered by the user 
		Scanner sc = new Scanner(System.in);
		out:
		do {
			// Show main menu 
			System.out.println("******************************");
			System.out.println("1、 I want to order ");
			System.out.println("2、 Check out the food bag ");
			System.out.println("3、 Delete order ");
			System.out.println("4、 Sign the order ");
			System.out.println("5、 I want to like ");
			System.out.println("6、 Exit the system ");
			System.out.println("******************************");
			// Prompt the user to enter the desired operation 
			System.out.println(" Please select ：");
			int choose = sc.nextInt();
			boolean falg = true;//true Indicates that no empty location was found 
			switch (choose) {
			case 1:
				// I want to order 
				System.out.println("***** I want to order *****");
				// Find an empty location , Perform the insert operation 
				for (int i = 0; i < names.length; i++) {
					if(names[i] == null) {
						falg = false;
						// Display all available product information 
						System.out.println(" Serial number \t\t Dish name \t\t The unit price \t\t Number of likes ");
						for (int j = 0; j < dishNames.length; j++) {
							System.out.println((j + 1) + "\t\t" + dishNames[j] +"\t\t" + prices[j] + " element \t\t" + praiseNums[j] + " Fabulous ");							
						}
						// Perform the insert operation 
						System.out.println(" Please select the serial number of the meal you want to order ：");
						int orderNum = sc.nextInt();
						System.out.println(" Please enter the number of meals ：");
						int number = sc.nextInt();
						String dishMeg = dishNames[orderNum - 1] + " " + number + " Share ";
						System.out.println(" Please enter the name of the orderer ：");
						String name = sc.next();
						int time;
						while(true) {
							System.out.println(" Please choose the delivery time （10-20 Integer between ）：");
							time = sc.nextInt();
							if(time < 10 || time > 20) {
								System.out.println(" I'm sorry , The reservation time you entered is incorrect , Please re-enter 10-20 Integer between ：");
							}else {
								break;
							}
						}
						System.out.println(" Please enter your delivery address ：");
						String address = sc.next();
						
						// Calculate meal expenses 
						double sumPrice = prices[orderNum - 1] * number;
						Double deliPrice = sumPrice > 50 ? 0.0 : 6.0;
						
						// Display order information 
						System.out.println(" The meal was ordered successfully ！");
						System.out.println(" What's your order ：" + dishMeg);
						System.out.println(" The orderer ：" + name);
						System.out.println(" Delivery time ：" + time + " spot , Please sign for it in time ");
						System.out.println(" The delivery address is ：" + address);
						System.out.println(" The total cost of the meal is ：" + (sumPrice + deliPrice) + ", The meal cost is " + sumPrice + " element , The delivery fee is ：" + deliPrice + " element ");
						
						// Add the data to the corresponding position of the array 
						names[i] = name;
						dishMegs[i] = dishMeg;
						times[i] = time;
						addresses[i] = address;

						sumPrices[i] = (sumPrice + deliPrice);
						
						break;
					}
				}
				// There's no empty space , Can't insert 
				if(falg) {
					System.out.println(" I'm sorry , Your bag is full ！");
				}
				break;
			case 2:
				// Check out the food bag 
				System.out.println("***** Check out the food bag *****");
				System.out.println(" Serial number \t\t The orderer \t\t Ordering information \t\t Delivery time \t\t Delivery address \t\t Total sum \t\t The order status ");	
				for (int i = 0; i < names.length; i++) {
					String state = states[i] == 0 ? " Booked " : " Completed ";
					if(names[i] != null) {
						System.out.println((i + 1) + "\t\t" + names[i] + "\t\t" + dishMegs[i] + "\t\t" + times[i] + " spot \t\t" + addresses[i] + "\t\t" + sumPrices[i] + " element \t\t" + state);
					}
				}
				break;
			case 3:
				// Delete order 
				System.out.println("***** Delete order *****");
				System.out.println(" Please enter the serial number of the order to delete ：");
				int deleteOrderId = sc.nextInt();
				int deleteIndex = -1;// The subscript of the order to be deleted 
				boolean isNotfind = true;// Indicates whether the order is found .true I didn't find 
				for (int i = 0; i < names.length; i++) {
					// The order has been signed , Delete 
					if(names[i] != null && states[i] == 1 && deleteOrderId == i + 1) {
						deleteIndex = i;
						isNotfind = false;
						break;
					}
					// The order has been booked but not signed 
					else if(names[i] != null && states[i] == 0 && deleteOrderId == i + 1) {
						System.out.println(" The order you selected has not been signed , Can't delete ！");
						isNotfind = false;
						break;
					}			
				}
				// Order not found 
				if(isNotfind) {
					System.out.println(" I'm sorry , This order does not exist ！");
				}
				// Delete 
				if(deleteIndex != -1) {
					for(int i = deleteIndex; i < names.length - 1; i++) {
						names[i] = names[i + 1];
						dishMegs[i] = dishMegs[i + 1];
						times[i] = times[i];
						addresses[i] = addresses[i + 1];
						states[i] = states[i + 1];
					}
					// Empty the last position of the array 
					names[names.length - 1] = null;
					dishMegs[names.length - 1] = null;
					times[names.length - 1] = 0;
					addresses[names.length - 1] = null;
					states[names.length - 1] = 0;
					System.out.println(" Order deleted successfully ！");
				}
							
				break;
			case 4:
				// Sign the order 
				System.out.println("***** Sign the order *****");
				System.out.println(" Please enter the order serial number to sign ：");
				int signOrderId = sc.nextInt();
				boolean notfind = true;// Indicates whether the order is found .true I didn't find 
				for (int i = 0; i < names.length; i++) {
					// The order has been signed 
					if(names[i] != null && states[i] == 1 && signOrderId == i + 1) {
						System.out.println(" The order you selected has been signed , Can't sign again ！");
						notfind = false;
						break;
					}
					// The order has been booked but not signed 
					else if(names[i] != null && states[i] == 0 && signOrderId == i + 1) {
						states[i] = 1;
						System.out.println(" Your order was signed successfully ！");
						notfind = false;
						break;
					}			
				}
				// Order not found 
				if(notfind) {
					System.out.println(" I'm sorry , This order does not exist ！");
				}
				
				break;
			case 5:
				// I want to like 
				System.out.println("***** I want to like *****");
				// Display all the product information that you can choose to like 
				System.out.println(" Serial number \t\t Dish name \t\t The unit price \t\t Number of likes ");
				for (int i = 0; i < dishNames.length; i++) {
					System.out.println((i + 1) + "\t\t" + dishNames[i] +"\t\t" + prices[i] + " element \t\t" + praiseNums[i] + " Fabulous ");							
				}
				System.out.println(" Please enter the serial number of the food you like ：");
				int praiseId = sc.nextInt();
				praiseNums[praiseId - 1]++;// Like number plus 1
				System.out.println(" I like it ！");
				break;
			case 6:
				// User input 6 Exit the system 		
				System.out.println("***** Exit the system *****");
				break out;
			default:
				// User input 1-6 Other numbers exit the loop 
				break out;
			}
			// Prompt the user for input 0 Go back and continue 
			System.out.println(" Input 0 return ：");
			num = sc.nextInt();
		}while(num == 0);
		// Input not 0 The exit 
		System.out.println(" Thank you for using. , looking forward to your next visit ！");
	}
}