Question

Write a program for playing tic tac toe. Two players take turns marking an available cell in a 3 X 3 grid with their respective tokens (either X or O). When one player has placed the three tokens in a horizontal, vertical, or diagonal row on the grid, the game is over and that player has won. A draw occurs when all the cells on the grid have been filled with tokens and neither player has achieved a win. When a token is entered, the program redisplays the board on the console and determines the status of the game. (Win or Draw).

Answer 1

import java.util.*;

public class tictactoe{

//array to store values inserted in the bord

static char[][] board = {{' ',' ',' '},{' ',' ',' '},{' ',' ',' '}};

//method to display board

public static void display(){

System.out.println("-------------");

for(int i=0;i<3;i++)

for(int j=0;j<3;j++)");

if(board[i][j] != ' ')

System.out.print(board[i][j]);

System.out.println("

System.out.println("-------------");

}

//method for player1 to make choice

public static void player1(){

Scanner in = new Scanner(System.in);

System.out.print("Enter a row for player X: ");

int row = in.nextInt();

System.out.print("Enter a column for player X: ");

int col = in.nextInt();

//if the value are not valid and not between 0-2

if(row > 2 || row < 0 || col > 2 || col < 0){

System.out.println("Invalid Choice");

player1();

}

//if selected position is empty

else if(board[row][col] == ' '){

board[row][col] = 'X';

check('X',row,col);

player2();

}

//if selected position is not empty

else{

System.out.println("Already filed, Enter another choice");

player1();

}

}

//method for player2 to make choice

public static void player2(){

Scanner in = new Scanner(System.in);

System.out.print("Enter a row for player O: ");

int row = in.nextInt();

System.out.print("Enter a column for player O: ");

int col = in.nextInt();

//if the value are not valid and not between 0-2

if(row > 2 || row < 0 || col > 2 || col < 0){

System.out.println("Invalid Choice");

player2();

}

//if selected position is empty

else if(board[row][col] == ' '){

board[row][col] = 'O';

check(')',row,col);

player1();

}

//if selected position is not empty

else{

System.out.println("Already filed, Enter another choice");

player2();

}

}

//method to check whether a player has won

public static void check(char s, int row, int col){

display();

//check row has same 3 values

int count = 0;

for(int i=0;i<3;i++){

if(board[row][i] == s)

count++;

}

if(count == 3){

System.out.println(s + " player won");

System.exit(0);

}

//checking column has same 3 values

count = 0;

for(int i=0;i<3;i++){

if(board[i][col] == s)

count++;

}

if(count == 3){

System.out.println(s + " player won");

System.exit(0);

}

//checking first diagonal has same 3 values

count = 0;

for(int i=0;i<3;i++){

if(board[i][i] == s)

count++;

}

if(count == 3){

System.out.println(s + " player won");

System.exit(0);

}

//checking second diagonal has same 3 values

count = 0;

for(int i=0;i<3;i++){

if(board[i][2-i] == s)

count++;

}

if(count == 3){

System.out.println(s + " player won");

System.exit(0);

}

//checking whether all places are filled

count = 0;

for(int i=0;i<3;i++)

for(int j=0;j<3;j++)

if(board[i][j] == ' ')

count++;

if(count == 0){

System.out.println("Game tied");

System.exit(0);

}

}

public static void main(String[] args){

display();

player1();

}

}

Step-by-step explanation: