Procedural Abstraction, Arrays, Algorithim Question 10 page 227 on Absolute C++

Question

Procedural Abstraction, Arrays, Algorithim

Question 10 page 227 on Absolute C++


Write a program to assign passenger seats in an airplane. Assumea small airplane with a seat numbering as follows:


1 A B C D
2 A B C D
3 A B C D
4 A B C D
5 A B C D
6 A B C D
7 A B C D

The program should display the seat pattern with an 'X' marking the seats already assigned. For example, after seats 1 A, 2 B, and 4 C are taken, the display should look like this:

1 X B C D
2 A X C D
3 A B C D
4 A B X D
5 A B C D
6 A B C D
7 A B C D

After displaying the seats available, the program prompts for the seat desired, the user types in a seat, and then the display of available seats is updated. This continues until all seats are filled or until the user signals that the program should end. If the user types in a seat that is already assigned, the program should say that seat is occupied and ask for another choice.

Help is appreciated, I am very stuck on this program

Explanation / Answer

please rate - thanks

import java.util.*;
public class main
{public static void main(String[] args) {
char[][] seats = new char[7][4];
int i,filled=0,row,col;
char c;
String input;
for (i=0;i<7;i++)
   for(c='A';c<='D';c++)
       seats[i][(int)(c-'A')]=c;
Scanner in = new Scanner(System.in);
printSeats(seats);
System.out.print("Enter seat selection(e.g.'1A')blank line to quit: ");
input=in.nextLine();
while((filled<28)&&(input.length()>0))
{row=(int)(input.charAt(0)-'1');
col=(int)(Character.toUpperCase(input.charAt(1))-'A');
if(row<0||row>6||col<0||col>3)
    System.out.println("Invalid seat selection");
else if(seats[row][col]=='X')
     System.out.println("Sorry-that seat is taken");
else
    {filled++;
    seats[row][col]='X';
    }
printSeats(seats);   
System.out.print("Enter seat selection(e.g.'1A')blank line to quit: ");
input=in.nextLine();
}
if(filled==28)
    System.out.println("Plane full");
System.out.println("Final seat assignments: ");
printSeats(seats);

}
private static void printSeats(char[][] seats)
{int i,j;
for (i=0;i<7;i++)
{System.out.print((i+1)+" ");
for(j=0;j<4;j++)
    System.out.print(seats[i][j]+" ");
System.out.println();
}
}

}

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