Sophomore Java Homework-P6.24

/**
 * Name: Two-Dimensional Arrays - Theater Seating Selling System
 * @author LinChuWen
 * Date: 2014.10.28
 *
 * NCHU EE,course number:2335
 * course name: Object Oriented Language
 * Textbook: Big Java:Late Objects-Cay S. Horstmann
 * Problem: P6.18
 *
 * Description: A Theater Seating Selling System
 */
import java.util.*;
public class HW5_P6_24_ {
    private static Scanner input = new Scanner(System.in);
    private static int[][] seatingChart = new int[10][11];

    public static void main(String[] args){
        buildDefaultSeatingChart();
        while(true){
            askForEnter();
            printSeatingChart(0);
            askForBuy();
        } //big while end
    } //main end

    private static void askForBuy(){
        System.out.print("Pick a seat or a price? (enter seat/price)");
        char reply = input.nextLine().charAt(0);

        if(reply == 's' || reply == 'S')
            buySeat();
        else
            buyPrice();

    } //askForBuy() end

    private static void buySeat(){
        System.out.print("Which row do you want? (enter integer)");
        int row = input.nextInt();
        System.out.print("Which column do you want? (enter integer)");
        int column = input.nextInt();
        int price = seatingChart[row][column];

        if(price != 0){
            seatingChart[row][column] = 0;
            System.out.printf("You should pay %d dollars\n", price);
        } else{ // price = 0, means the seat have been sold
            System.out.println("Sorry, this seat is not available.");
        } //if-else end
    } //buySeat() end

    private static void buyPrice(){
        System.out.print("Which price do you want to pay? (enter integer)");
        printSeatingChart(input.nextInt());
        buySeat();
    } //buyPrice() end

    private static void printSeatingChart( int state ){
        int cnt1, cnt2;
        System.out.println("   row|");

        for(cnt1=0 ; cnt1<9 ; cnt1++){
            System.out.printf("%6d|", cnt1);

            for(cnt2=0 ; cnt2<10 ; cnt2++){
                if(state == 0)
                    System.out.printf("%3d", seatingChart[cnt1][cnt2]);
                else
                    System.out.printf("%3d", seatingChart[cnt1][cnt2]==state?state:1);
            } //small for end

            System.out.printf("\n");
        } //big for end
        System.out.println("-------------------------------------");
        System.out.print("column|");
        for(cnt2=0;cnt2<10;cnt2++)
            System.out.printf("%3d", cnt2);
        System.out.printf("\n");
    } //printSeatingChart() end

    private static void askForEnter(){
        System.out.print("Enter the System? (enter y/n) ");
        String reply;
        while ((reply= input.nextLine()).equals("")){}
        char ans = reply.charAt(0);
        if(ans == 'n' || ans == 'N'){
            System.out.println("Thank You!");
            System.exit(0);
        } else if(ans == 'y' || ans == 'Y'){    //enter the system
            System.out.println("Welcome to Go-Ice's Theater!");
            System.out.println("Here are our seating chart and the ticket prices");
            System.out.println("(note \"0\" means \"not available\")\n");
        } //if-else if end
    } //askForEnter() end

    private static void buildDefaultSeatingChart(){
        int[][] line_6to8 = {{20,20,30,30,40,40,30,30,20,20},
                     {20,30,30,40,50,50,40,30,30,20},
                     {30,40,50,50,50,50,50,50,40,30}};
        int cnt,index=6;
        for(cnt=0;cnt<3;cnt++)
            Arrays.fill(seatingChart[cnt], 10);
        for(cnt=3;cnt<6;cnt++)
            Arrays.fill(seatingChart[cnt], 20);
        for(int cnt1=0 ; cnt1<3 ; cnt1++){
            for(int cnt2=0 ; cnt2<10 ; cnt2++){
                seatingChart[index][cnt2] = line_6to8[cnt1][cnt2];
            } //small for end
            index++;
        } //big for end
    } //buildDefaultSeatingChart() end

} //class end