2-dimensional tic-tac-toe
Hello....This program should detect when a player has won, or when the game ends in a draw. I'm having trouble with my method main part. Here is my program...Can anyone help me solve this please...
Code:
package tictactoe;
import java.util.Scanner;
public class Main {
static byte[][] board;
public boolean xTurn;
public Scanner keyboard;
public static void main(String[] args) {
TicTacToe game = new TicTacToe();//1st problem
game.play();
}
public static void TicTacToe() {
board = new byte[3][3];
for (int r = 0; r < 3; r++) {
for (int c = 0; c < 3; c++) {
board[r][c] = ' ';
}
}
boolean xTurn = true;
keyboard = new Scanner(System.in);//2nd problem
}
public void displayRow(int row) {
System.out.println(" " + board[row][0] + " | " + board[row][1] + " | " + board[row][2]);
}
public void displayBoard() {
displayRow(0);
System.out.println("-----------");
displayRow(1);
System.out.println("-----------");
displayRow(2);
}
public void displayMenu() {
if (xTurn) {
System.out.println("X's Turn!");
} else {
System.out.println("O's Turn!");
}
System.out.println("What would you like to do?");
System.out.println("1: Make a move");
System.out.println("2: Start Over");
System.out.println("3: Quit");
System.out.print("Choice: ");
}
public boolean getMove() {
boolean invalid = true;
int row = 0, column = 0;
while (invalid) {
System.out.println("Which row, column would you like to move to?"
+ " Enter two numbers between 0-2 separated by a space to indicate position.");
row = keyboard.nextInt();
column = keyboard.nextInt();
if (row >= 0 && row <= 2 && column >= 0 && column <= 2) {
if (board[row][column] != ' ') {
System.out.println("That position is already taken");
} else {
invalid = false;
}
} else {
System.out.println("Invalid position");
}
}
if (xTurn) {
board[row][column] = 'X';
} else {
board[row][column] = 'O';
}
return winner(row, column);
}
public void restart() {
for (int r = 0; r < 3; r++) {
for (int c = 0; c < 3; c++) {
board[r][c] = ' ';
}
}
xTurn = true;
}
public boolean winner(int lastR, int lastC) {
boolean winner = false;
byte symbol = board[lastR][lastC];
int numFound = 0;
for (int c = 0; c < 3; c++) {
if (board[lastR][c] == symbol) {
numFound++;
}
}
if (numFound == 3) {
winner = true;
}
numFound = 0;
for (int r = 0; r < 3; r++) {
if (board[r][lastC] == symbol) {
numFound++;
}
}
if (numFound == 3) {
winner = true;
}
numFound = 0;
for (int i = 0; i < 3; i++) {
if (board[i][i] == symbol) {
numFound++;
}
}
if (numFound == 3) {
winner = true;
}
numFound = 0;
for (int i = 0; i < 3; i++) {
if (board[i][2 - i] == symbol) {
numFound++;
}
}
if (numFound == 3) {
winner = true;
}
return winner;
}
public boolean boardFull() {
int numSpotsFilled = 0;
for (int r = 0; r < 3; r++) {
for (int c = 0; c < 3; c++) {
if (board[r][c] == 'X' || board[r][c] == 'O') {
numSpotsFilled++;
}
}
}
return numSpotsFilled == 9;
}
public void play() {
while (true) {
displayBoard();
displayMenu();
int choice = keyboard.nextInt();
if (choice == 1) {
if (getMove()) {
displayBoard();
if (xTurn) {
System.out.println("X Wins!");
} else {
System.out.println("O Wins!");
}
System.exit(0);
} else if (boardFull()) {
displayBoard();
System.out.println("Draw!");
System.exit(0);
} else {
xTurn = !xTurn;
}
} else if (choice == 2) {
restart();
} else if (choice == 3) {
System.exit(0);
} else {
System.out.println("Invalid Option");
}
}
}
}
