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This method will sell the seat in row i and column j unless it is already sold. A ticket is sold if the price of that seat in the array is 0. If the ticket is not sold, add the price of the seat in row i and column j to the totalSales and then set the price of that seat to 0 to designate it has been sold and return true since a sell was made. If the ticket was already sold, then return false.

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teobguan2019

Answer:

The solution code is written in Java.

  1. public class Movie {
  2.    private double  [][] seats = new double[5][5];
  3.    private double totalSales;
  5.    public Movie(){
  7.        for(int i= 0; i < this.seats.length; i++){
  8.            for(int j = 0; j < this.seats[i].length; j++){
  9.                this.seats[i][j] = 12;
  10.            }
  11.        }
  13.        this.totalSales = 0;
  14.    }
  16.    public boolean bookSeat(int i, int j)
  17.    {
  18.        if(this.seats[i][j] != 0){
  19.            this.totalSales += this.seats[i][j];
  20.            this.seats[i][j] = 0;
  21.            return true;
  22.        }else{
  23.            return false;
  24.        }
  26.    }
  27. }

Explanation:

The method, bookSeat(), as required by the question is presented from Line 16 - 26 as part of the public method in a class Movie.  This method take row, i, and column, j, as input.

By presuming the seats is an two-dimensional array with all its elements are  initialized 12 (Line 7 - 10). This means we presume the movie ticket price for all the seats are $12, for simplicity.

When the bookSeat() method is invoked, it will check if the current price of seats at row-i and column-i is 0. If not, the current price, will be added to the totalSales (Line 19) and then set the price to 0 (Line 20) and return true since the ticket is successfully sold (Line 21).  If it has already been sold, return false (Line 23).

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