Question

Write pseudocode for a program where the seating map for a particular performance at a theater contains 70 rows of 100 seats each. Using an array where applicable, develop the pseudeocode for a program that allows a user to continuously enter each household size and then

a) Allows a user to continuously enter a row number and seat number until they enter an appropriate sentinel value for the row number in order to stop entering input. Each time the user enters a valid row and seat number, the program determines if that seat is available, and if so, marks it as reserved with an “X” (available seats are not marked in any way).

b) Once the user quits, the program outputs

i) each row number followed by the seat numbers in that row that have been reserved

ii) the total number of reserved seats

iii) the total number of available seats This seating map applies only to this particular show. For other shows, the seating map may contain a different number of rows and seats per row, and the program must be capable of being modified for those by editing only two lines of code.

Answer 1

/* The JAVA program to enter the size of each household and enter row and seat number continously to reserve the seat
and on quit, display the reserved seats , number of seats reserved, number of seat available */
import java.util.Scanner;
class seatmap
{
public static void main(String arg[])
   {
       int rowsize=70;
       int colsize=100;
       int row,col,size,avail,reserved;
       char seat[][]=new char[rowsize][colsize];
       int i,j;
       Scanner in=new Scanner(System.in);
       // initialaize all seats to blank
       for(i=0;i<rowsize;i++)
           {
               seat[i]=new char[colsize];
               for( j=0;j<colsize;j++)
                   seat[i][j]=' ';
               }

   // loop continiously untill 0 is pressed
       while(true)
           {
               System.out.print("Enter the household size (0 to quit) : ");
               size=in.nextInt();
               if(size==0)
                   break;
               for(i=1;i<=size;i++)
                   {
                   System.out.print("\nEnter the row numer(0 to 69) and a seat number(0 to99) : ");
                   row=in.nextInt();
                   col=in.nextInt();
                   // if desires row and seat is not available
                   if   (seat[row][col]=='X')
                           {
                           System.out.print("\nSeat is not available. try again ..");
                           i--;
                           }
                           else
                               {
                                   seat[row][col]='X'; // reserve the seat

                               }
                           }
               }

           System.out.println("Reserved Seats below");
           reserved=0;
           // print reserved seat by row number and seat number
           for(i=0;i<rowsize;i++)
               {
                   for(j=0;j<colsize;j++)
                       {
                           if(seat[i][j]=='X')
                               {
                               System.out.println("Row : "+i + " seat: "+ j) ;
                               reserved+=1;
                               }
                       }
           }
           //show number of reserved seats
           System.out.println("Total Number of seat reserved : " +reserved);
           // calculate and show number of available seats
           avail=(rowsize*colsize)-reserved;
           System.out.println("Total Number of seat available : " +avail);

}
}

//sample run