tictactoe.java

import java.util.*;


class tictactoe{
    public static void main(String[] args){
        char[][] board = new char[3][3];
        for(int row = 0; row<board.length;row++){
            for (int col =0;col<board[row].length;col++){
                board[row][col]=' ';
            }
        }

        char player = 'X';
        boolean gameOver = false;
        Scanner sc = new Scanner(System.in);

        while(!gameOver){
            printBoard(board);
            System.out.println("Player " + player + " enter: ");
            int row = sc.nextInt();
            int col = sc.nextInt();

            if (board[row][col]==' '){
                board[row][col] = player;
                gameOver = haveWon(board,player);
                if (gameOver){
                    System.out.println("Player " + player + " has won!");
                }else{
                    // if (player == 'A'){
                    //     player = 'O';
                    // }else{
                    //     player = 'A';
                    // }   
                    player = (player =='X')? 'O' : 'X';
                }
            }else{
                System.out.println("Invalid move. Try again.");
            }
        }

        printBoard(board);
    }
    public static boolean haveWon(char[][] board,char player){
        //check the rows
        for(int row=0;row<board.length;row++){
            if(board[row][0] == player && board[row][1] ==player && board[row][2]==player){
                return true;
            }
        }

        //check for column
        for(int col=0; col<board.length;col++){
            if(board[0][col]== player && board[1][col]== player && board[2][col]== player){
                return true;
            }
        
        }

        //diagnol

        if(board[0][0] == player && board[1][1]==player && board[2][2]== player){
            return true;
        }
        if(board[0][2]==player && board[1][1]== player && board[2][0]==player){
            return true;
        }
        return false;

    }

    public static void printBoard(char[][] board){
        for(int row=0;row<board.length;row++){
            for(int col=0;col<board.length;col++){
                System.out.print(" " + board[row][col] + " ");
                if(col<2) System.out.print("|");
                
            }
            System.out.println();
            if(row<2) System.out.println("---+---+---");
        }
    }
}