Hi I need help on a homework assignment the seating chart for the airline progra
ID: 3772525 • Letter: H
Question
Hi I need help on a homework assignment the seating chart for the airline program doesnt come up big and with A-f as columns and rows 1-13 for first class 1-2 business class 3-7 and economy class 8-13 it should have * as available seats and x as taken seats also it should print out the chart each time they want to reserve a seat not until they quit and they should go back to the main menu if they choose to go back to the previous menu here is my code.
import java.io.*;
import java.util.*;
public class AirReservations2 {
static Scanner scan = new Scanner(System.in);
public static void main(String[] args) {
// TODO Auto-generated method stub
{
// creats new array, at this point all of the values are set to null
char[][] seats = new char[13][6];
choiceSelection(seats);
// this method will populate the array with "*" instead of nulls,
// denoting an empty seat
pupulateGrid(seats);
// prompt user, 0 to quit 1 to reserve
choiceMenu(seats);
printGrid(seats);
}
}
private static void choiceSelection(char[][] seats) {
int choice = menuSystemCall();
System.out.println("Choice Choosen--->"+choice);
switch (choice) {
case 0:
System.exit(0);
break;
case 1:
seatingSystemCall(seats, choice);
break;
case 2:
choice = menuSystemCall();
seatingSystemCall(seats, choice);
break;
case 3:
seatingSystemCall(seats, choice);
break;
default:
choice = menuSystemCall();
break;
}
}
public static void choiceMenu(char[][] seats) {
System.out.println("Enter 0 to quit or 1 to reserve a ticket");
// choice is the result of the above prompt
int choice = scan.nextInt();
// if choice is 0 then the user does not run this loop and they are done
// booking id choice is 1 the loop below will run.
while (choice != 0) {
// the rowMessage() asks the user for a row choice i.e. A, B, C, D,
// E
// converts it to an int. We do this so we can use the numerical
// value to index the array.
int row = rowMessage();
// the colMessage() asks the user for a numerical row choice
// and returns and stores it into column
int col = colMessage();
// HERE IS WHERE WE CHECK IF THE ROW AND COL ENTERD IS VALID
if (row < 13 && col < 6) {
// System.out.println("Seat Status--->"+seats[row][col]);
// HERE IS WHERE WE CHECK IF THE seat is taken, if it is print
// seat taken
if (seats[row][col] == 'X')
System.out.println("seat taken by others already");
// if the seat is empty mark it occupied using 'x'
if (seats[row][col] == '*')
System.out.println("seat reserved for you");
seats[row][col] = 'x';
}// END IF FOR VALID CHECK HERE
System.out.print("Enter 0 to quit or 1 to reserve a ticket");
choice = scan.nextInt();
}
}
private static void seatingSystemCall(char[][] seats, int ch) {
SeatingSystem2 mySystem = new SeatingSystem2();
if (ch == 3 || ch == 1)
mySystem.displaySeatingchart(seats);
mySystem.seatAvailable(seats, "seatCode");
mySystem.seatAssign(seats, "seatCode");
if (ch == 2)
mySystem.seatUnAssign(seats, "seatCode");
}
private static int menuSystemCall() {
MenuSystem2 myMenu = new MenuSystem2();
int choice = myMenu.presentMenu("main");
System.out.println("Choice menuSystemCall--->"+choice);
if(choice == 0 || choice==2||choice==3){
return choice;
}
myMenu.presentSeatingChoice("sc-menu", 0);
myMenu.presentClassChoice("cc-menu", 0);
myMenu.presentRowChoiceMenu("rc-menu", 0);
myMenu.presentColumnChoiceMenu("col-menu", 0);
return choice;
}
public static int rowMessage() {
System.out.println(" Enter your row as letter ");
String rowLetter = scan.next();
if (rowLetter.equals("A"))
return 0;
if (rowLetter.equals("B"))
return 1;
if (rowLetter.equals("C"))
return 2;
if (rowLetter.equals("D"))
return 3;
if (rowLetter.equals("E"))
return 4;
if (rowLetter.equals("F"))
return 5;
return 6;
}
public static int colMessage() {
System.out.println(" Enter your column number ");
int col = scan.nextInt();
return col;
}
public static void printGrid(char[][] multiPassed) {
for (int i = 0; i < 13; i++) {
for (int j = 0; j < 6; j++) {
System.out.print(multiPassed[i][j]);
}
System.out.println("");
}
}
public static void pupulateGrid(char[][] multiPassed) {
for (int i = 0; i < 13; i++) {
for (int j = 0; j < 6; j++) {
multiPassed[i][j] = '*';
}
}
}
}
import java.util.Scanner;
public class MenuSystem2 {
//This will print the menuId which what the user want to do for the first
//MainMenu
public static int presentMenu(String menuId)
{ Scanner scan = new Scanner(System.in);
if(menuId.equals("main"))//This will equal the main menu of the Airline Reservation System
{
System.out.println("1. Book a reservation ");
System.out.println("2. Cancel a reservation ");
System.out.println("3. Print Current Seating Chart ");
System.out.println("Press 0 to Exit System " );
System.out.println("Please choose an option to proceed|| Pres '0' to exit to main menu ");
menuId = scan.nextLine();
}
return Integer.parseInt(menuId);//This will return the main menu
}
//This will let the user to pick a choice either a ticket type or return
//to the main menu
public static int presentSeatingChoice(String menuId, int scChoicemenu)
{
Scanner scan = new Scanner(System.in);
if (menuId.equals("sc-menu"))//This method will be be determined what the
//user will want to do.
{
System.out.println("Seating Choice Menu");
System.out.println("1) Choose Ticket Type (First Class, Business Class, Economy Class)");
System.out.println("2) Exit to Main Menu");
System.out.println("Pick a choice to proceed to the next section or type a to '2' to go back to the MainMenu");
scChoicemenu = scan.nextInt();
}
int sChoice = scChoicemenu;
return sChoice;//This will return the Seating Choice Menu
}
//This method will return the class choice menu
public static int presentClassChoice(String menuId, int ccChoicemenu)
{
Scanner scan = new Scanner(System.in);
if (menuId.equals("cc-menu"))// This will also equal to the menuId for
// the class choice menu to appear
{
System.out.println("Class Choice Menu");
System.out.println("1. Firstclass");
System.out.println("2. Businessclass");
System.out.println("3. Economyclass");
System.out.println("0. Exit to the MainMenu");
System.out.println("Please choose a Class choice or type '0'to return to return to the main menu");
ccChoicemenu = scan.nextInt();
}
int cChoice = ccChoicemenu;
return cChoice;// This will return the Class Choice Menu
}
//This method will let the user to choose what row they like to seat in
public static int presentRowChoiceMenu(String menuId, int rwChoicemenu)
{
Scanner scan = new Scanner(System.in);
if(menuId.equals("rc-menu"));//Row Choice Menu inside a if statement that
//Will equals to the choices below
System.out.println("Row Choice Menu");
System.out.println("1)(For first class type numbers type '1-2'");
System.out.println("2)(For Business class type '3-7'");
System.out.println("3)(For Economy class type '8-13' ");
System.out.println("Choose a option to proceed to the column choice");
rwChoicemenu= scan.nextInt();
int rwChoice= rwChoicemenu;
return rwChoice;
}
//This method is where the column choices will take place to let the user
//Decide what column they like to place in
public static int presentColumnChoiceMenu(String menuId, int cwChoice)
{
Scanner scan = new Scanner(System.in);
System.out.println("Seat Choice Menu");
if(menuId.equals("col-menu"));//Column Choice Menu will also be equal to the
//choices below
{
System.out.println("Pick a letter which you want to reserve in 'A=1' , 'B=2', 'C=3', 'D=4', 'E=5', 'F=6' ");
System.out.println("Choose a option to proceed || Pres '0' to exit to main menu ");
cwChoice = scan.nextInt();
}
int cChoice=cwChoice;
return cwChoice;
}
}
public class SeatingSystem2 {
public static final int ROWS = 13;
public static final int COLS = 6;
public static final void seat(char[][] seatingChart) {
for (int i = 0; i < ROWS; i++) {
for (int j = 0; j < COLS; j++) {
seatingChart[i][j] = '*';
}
}
}// this is where the seatingSystem will determine if the seat is Available
// or not
public static boolean seatAvailable(char[][] seatingChart, String seatCode) {
int row = 1, index = 1, col = 1;
while (seatCode.charAt(index) >= '0' && seatCode.charAt(index) <= '9') {
row = row * 10 + (int) seatCode.charAt(index) - 48;
index++;
}
if(index>(int) 'A')
col = (int) index - (int) 'A';
System.out.println(row +"--->"+col);
if (seatingChart[row][col] == '*')
return true;
else
return false;
}
// This method will be an integer and a char statement with a nested
// if else statment to assign the seat
public static int seatAssign(char[][] seatingChart, String seatCode) {
int row = 0, index = 0, col = 0;
while (seatCode.charAt(index) >= '0' && seatCode.charAt(index) <= '9') {
row = row * 10 + (int) seatCode.charAt(index) - 48;
index++;
}
if(index>(int) 'A')
col = (int) index - (int) 'A';
System.out.println("roiw"+row+"----->"+col);
if (seatingChart[row][col] == '*') {
seatingChart[row][col] = 'X';
return 1;
}
return 0;
}
public static int seatUnAssign(char[][] seatingChart, String seatCode) {
int row = 0, index = 0, col = 0;
while (seatCode.charAt(index) >= '0' && seatCode.charAt(index) <= '9') {
row = row * 10 + (int) seatCode.charAt(index) - 48;
index++;
}
if(index>(int) 'A')
col = (int) index - (int) 'A';
if (seatingChart[row][col] == 'X') {
seatingChart[row][col] = '*';
return 1;
}
return 0;
}
// this method will display and print the seating chart
public static void displaySeatingchart(char[][] seatingChart) {
System.out.print(" ");
for (int j = 0; j < COLS; j++) {
System.out.print((char) ((int) 'A' + j) + " ");
}
System.out.println();
for (int i = 0; i < ROWS; i++) {
System.out.print("Row" + String.valueOf(i + 1) + " ");
for (int j = 0; j < COLS; j++)
System.out.print(seatingChart[i][j] + " ");
}
System.out.println();
}
}
Explanation / Answer
Hi,
I tried to compile this code but getting lot of error.I tried to create new code..
import java.io.*;
import java.util.*;
public class Airline
{
static final int MAX_SEATS = 8;
public static void main(String[] args) {
Airline airline = new Airline();
}
public Airline() {
boolean done = false;
String[] seats = new String[MAX_SEATS];
initializeSeats(seats);
do {
printMainMenu();
int choice = getMainMenuChoice();
switch (choice) {
case 1:
makeReservation(seats);
break;
case 2:
cancelReservation(seats);
break;
case 3:
printSeatingChart(seats);
break;
case 4:
done = true;
break;
}
} while (!done);
}
void printMainMenu() {
System.out.println(" Main Menu ");
System.out.println("1. Make a reservation");
System.out.println("2. Cancel a reservation");
System.out.println("3. Print seating chart");
System.out.println("4. Quit");
System.out.println();
}
int getMainMenuChoice()
{
int choice; // choice entered
boolean valid = false; // is choice valid?
do {
System.out.print("===> ");
choice = Console.readInt();
if (1 <= choice && choice <= 4) {
valid = true;
} else {
System.out.println("Invalid choice.");
}
} while (!valid);
return choice;
}
void initializeSeats(String[] seats) {
for (int i = 0; i < seats.length; i++) {
seats[i] = "";
}
}
void makeReservation(String[] seats) {
int seatIndex = findEmptySeat(seats); // index of first empty seat
if (seatIndex == seats.length) {
System.out.println("All seats are full. Sorry.");
} else {
String name = getPassengerName(); // passenger's name
seats[seatIndex] = name;
System.out.println(name + " has been assigned seat #"
+ (seatIndex + 1));
}
}
/**
* Cancel a reservation
*/
void cancelReservation(String[] seats) {
int seatIndex = getSeatToCancel(); // index of seat to cancel
// reservation for
if (isEmpty(seats, seatIndex)) {
System.out.println("Seat #" + (seatIndex + 1)
+ " has not been reserved for anyone");
} else {
seats[seatIndex] = "";
System.out
.println("Seat #" + (seatIndex + 1) + " is now available");
}
}
/**
* Print the seating chart
*/
void printSeatingChart(String[] seats) {
System.out.println(" Seating Chart ");
for (int i = 0; i < seats.length; i++) {
System.out.println((i + 1) + ". " + seats[i]);
}
}
/**
* Find the index of the first empty seat on the plane. If there are no
* empty seats, return seats.length
*/
int findEmptySeat(String[] seats) {
for (int i = 0; i < seats.length; i++) {
if (isEmpty(seats, i)) {
return i;
}
}
return seats.length;
}
/**
* Yield whether seats[seatIndex] is an empty seat.
*/
boolean isEmpty(String[] seats, int seatIndex) {
return seats[seatIndex].equals("");
}
/**
* Input a passenger's name
*/
String getPassengerName() {
System.out.print("Enter the passenger's name: ");
return Console.readString();
}
int getSeatToCancel() {
boolean valid = false; // is the seat number valid?
int seat = 0; // seat number to cancel
do {
System.out.print("Enter the seat to cancel: ");
// seat = Console.readInt();
if (1 <= seat && seat <= MAX_SEATS) {
valid = true;
} else {
System.out.println("Invalid seat number");
}
} while (!valid);
return seat - 1;
}
}