Question

Assignment Purpose

The purpose of this lab is to write a well commented java program that demonstrates the use of two dimensional arrays, input validation, and methods. (Write by Java Code, Need Comment)

Instructions

1. A theater seating chart is implemented as a two-dimensional array of ticket prices, like this:

Seat Ticket Price

10 10 10 10 10 10 10 10 10 10

10 10 10 10 10 10 10 10 10 10

10 10 10 10 10 10 10 10 10 10

10 10 20 20 20 20 20 20 10 10

10 10 20 20 20 20 20 20 10 10

10 10 20 20 20 20 20 20 10 10

20 20 30 30 40 40 30 30 20 20

20 40 50 50 50 50 50 50 40 20

80 50 50 80 80 80 80 50 50 30

Seating Arrangement: Seats No.

1 2 3 4 5 6 7 8 9 10

11 12 13 14 15 16 17 18 19 20

21 22 23 24 25 26 27 28 29 30

31 32 33 34 35 36 37 38 39 40

41 42 43 44 45 46 47 48 49 50

51 52 53 54 55 56 57 58 59 60

61 62 63 64 65 66 67 68 69 70

71 72 73 74 75 76 77 78 79 80

81 82 83 84 85 86 87 88 89 90

2. Write a program that prompts the user to pick a price. When a user specifies a price, make sure it is available. Mark sold seats by changing the price to 0. You will write at least 3 methods.
   1. One method that reads, validates and returns the price.
   2. The other that checks whether a seat is available that price.
   3. The third method prints a confirmation if the seat is available or prints a message saying “A seat at this price is not available. Good Bye.”

Hint: Basically, you will search the 2D array for the input price, and as soon as you find a matching price, you will replace the price at that location with a 0.

Sample output 1

Please pick a price or press Q to quit: 80

      Checking for the availability……

      Your seat is confirmed! Your seat number is 81. Enjoy your movie

Please pick a price or press Q to quit: 80

      Checking for the availability……

      No seat at this price is available. Sorry!

Please pick a price or press Q to quit: Q
     Thank you for using our online ticketing service. Goodbye!

Sample output 2

Please pick a price or press Q to quit: 10

      Checking for the availability……

      Your seat is confirmed! Your seat number is 1. Enjoy your movie

Please pick a price or press Q to quit: 20

      Checking for the availability……

      Your seat is confirmed! Your seat number is 33. Enjoy your movie

Please pick a price or press Q to quit: 20

      Checking for the availability……

      Your seat is confirmed! Your seat number is 34. Enjoy your movie

      Please pick a price or press Q to quit: 200

      Please pick a valid price. Valid prices are $10, $20, $30, $40, $50, and $80

Please pick a price or press Q to quit: Q

Thank you for using our online ticketing service. Goodbye!

Answer 1

Code to copy along with screenshots of code and output are provided.
Please refer to screenshots to understand the indentation of code.
If you have any doubts or issues. Feel free to ask in comments
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Screenshots of Code :

Screenshots of Output :

Code to copy:

import java.util.Scanner;

public class Program {
  
  
   // declaring a 2d array to store prices of seats
   static int[][] seatPrices=
       {
          
           {10, 10, 10, 10, 10, 10, 10, 10, 10, 10},
           {10, 10, 10, 10, 10, 10, 10, 10, 10, 10},
           {10, 10, 10, 10, 10, 10, 10, 10, 10, 10},
           {10, 10, 20, 20, 20, 20, 20, 20, 10, 10},
           {10, 10, 20, 20, 20, 20, 20, 20, 10, 10},
           {10, 10, 20, 20, 20, 20, 20, 20, 10, 10},
           {20, 20, 30, 30, 40, 40, 30, 30, 20, 20},
           {20, 40, 50, 50, 50, 50, 50, 50, 40, 20},
           {80, 50, 50, 80, 80, 80, 80, 50, 50, 30}
  
   };

   // function to read price, validate and return price
   static int readPrice()
   {
      
       // decalring string to store choice
       String choice;
       // creating scanner object to take input from user
       Scanner sc = new Scanner(System.in);
       System.out.print("Please pick a price or press Q to quit: ");
       // taking input
       choice = sc.next();
      
       if(choice.equals("q") || choice.equals("Q"))
       {
           // if user enters 'q' or 'Q'
           System.out.println("Thank you for using our online ticketing service. Goodbye!");
           // return -1
           return -1;
       }
       else if(choice.equals("10") || choice.equals("20") || choice.equals("30") || choice.equals("50") || choice.equals("80") )
       {
           // if user enters valid price, then return as Integer
           return Integer.parseInt(choice);
          
       }
       else
       {
       // in case of invalid input
           System.out.println("Please pick a valid price. Valid prices are $10, $20, $30, $50, and $80 ");
           // return 0
           return 0;
       }
  
  
   }
  
   // function to check availability of seat
   static int seatAvailablity(int price)
   {
      
      
       System.out.println("Checking for the availability……");
      
       // iterating through 2d array using for loop
       for(int i = 0;i<9; i++)
       {
           for(int j = 0;j<10;j++)
           {
               if(price == seatPrices[i][j])
               {
               // if seat found then set value of that seat to 0
                   seatPrices[i][j] = 0;
                   // and return seat number
                   return (i*10)+(j+1)   ;
               }
           }
       }
       // otherwise return -1 (if no seat found)
       return -1;
   }
  
   // function to print confirmation of seat
   static void printConfirmation(int seatNumber)
   {
       if(seatNumber == -1)
       {
           // if seatNumber is -1
           System.out.println("No seat at this price is available. Sorry");
       }
       else
       {
           // otherwise print confirmation of seat
           System.out.println("Your seat is confirmed! Your seat number is "+ seatNumber + ". Enjoy your movie");
       }
   }
  
  
  
   // main method
public static void main(String args[])
{
// integer variable to hold price and seat number
   int price;
   int seatNumber;
  
   // infinite while loop
   while(true)
   {
      // calling readPrice() function and storing price into price variable
       price = readPrice();
     
   if(price == -1)
   {
       // if -1 , means user entered q , so break
       break;
   }
   else if(price == 0)
   {
       // price = 0 , means user entered invalid choice, do nothing
   }
   else
   {
       // else call seatAvailibilty and store seatNumber to seatNumber varaible
       seatNumber = seatAvailablity(price);
       // call prinConfirmation
       printConfirmation(seatNumber);
     
   }
      
   }
     
  
  
}
}

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