Question

I need screenshots for this solution done in Flowgorithm. Thank you.

Tic-Tac-Toe Game
Design a program that allows two players to play a game of tic-tac-toe. Use a
two-
dimensional String array with three rows and three columns as the game
board. Each element of the array should be initialized with an asterisk (*). The
program should run a loop that does the following:
a. Displays the contents of the board array.
b. Allows player 1 to select a location on the board for an X. The program should
ask the user to enter the row and column number.
c. Allows player 2 to select a location on the board for an O. The program should
ask the user to enter the row and column number.
d. Determines whether a player has won or if a tie has occurred. If a player has
won, the program should declare that player the winner and end. If a tie has
occurred, the program should say so and end.
e. Player 1 wins when there are three Xs in a row on the game board. Player 2
wins when there are three Os in a row on the game board. The winning Xs or
Os can appear in a row, in a column, or diagonally across the board. A tie
occurs when all of the locations on the board are full, but there is no winner.

Answer 1

Create a project named 'TicTacToe', and add the following 6 classes, run and be happy.


-->TicTacToe.java

public class TicTacToe {

    public static void main(String[] args) {
        Game game = new Game();
        
    }
}

-->Board.java

public class Board {
    private int[][] Board= new int[3][3];
    
    public Board(){
        clearBoard();
    }
    
    public void clearBoard(){
        for(int line=0 ; line<3 ; line++)
            for(int column=0 ; column<3 ; column++)
                Board[line][column]=0;
    }
    
    public void showBoard(){
        System.out.println();
        for(int line=0 ; line<3 ; line++){
        
            for(int column=0 ; column<3 ; column++){
                
                if(Board[line][column]==-1){
                    System.out.print(" X ");
                }
                if(Board[line][column]==1){
                    System.out.print(" O ");
                }
                if(Board[line][column]==0){
                    System.out.print("   ");
                }
                
                if(column==0 || column==1)
                    System.out.print("|");
            }
            System.out.println();
        }
                
    }

    public int getPosition(int[] attempt){
        return Board[attempt[0]][attempt[1]];
    }
    
    public void setPosition(int[] attempt, int player){
        if(player == 1)
            Board[attempt[0]][attempt[1]] = -1;
        else
            Board[attempt[0]][attempt[1]] = 1;
    }

    public int checkLines(){
        for(int line=0 ; line<3 ; line++){

            if( (Board[line][0] + Board[line][1] + Board[line][2]) == -3)
                return -1;
            if( (Board[line][0] + Board[line][1] + Board[line][2]) == 3)
                return 1;
        }
        
        return 0;
                
    }
    
    public int checkColumns(){
        for(int column=0 ; column<3 ; column++){

            if( (Board[0][column] + Board[1][column] + Board[2][column]) == -3)
                return -1;
            if( (Board[0][column] + Board[1][column] + Board[2][column]) == 3)
                return 1;
        }
        
        return 0;
                
    }
    
    public int checkDiagonals(){
        if( (Board[0][0] + Board[1][1] + Board[2][2]) == -3)
            return -1;
        if( (Board[0][0] + Board[1][1] + Board[2][2]) == 3)
            return 1;
        if( (Board[0][2] + Board[1][1] + Board[2][0]) == -3)
            return -1;
        if( (Board[0][2] + Board[1][1] + Board[2][0]) == 3)
            return 1;
        
        return 0;
    }

    public boolean fullBoard(){
        for(int line=0 ; line<3 ; line++)
            for(int column=0 ; column<3 ; column++)
                if( Board[line][column]==0 )
                    return false;
        return true;
    }
}

-->Game.java

import java.util.Scanner;

public class Game {
    private Board board;
    private int turn=1, who=1;
    private Player player1;
    private Player player2;
    public Scanner input = new Scanner(System.in);

    
    public Game(){
        board = new Board();
        startPlayers();
        
        while( Play() );
    }
    
    public void startPlayers(){
        System.out.println("Who will be player1 ?");
        if(choosePlayer() == 1)
            this.player1 = new Human(1);
        else
            this.player1 = new Computer(1);
        
        System.out.println("----------------------");
        System.out.println("Who will be Player 2 ?");
        
        if(choosePlayer() == 1)
            this.player2 = new Human(2);
        else
            this.player2 = new Computer(2);
        
    }
    
    public int choosePlayer(){
        int option=0;
        
        do{
            System.out.println("1. Human");
            System.out.println("2. Computer\n");
            System.out.print("Option: ");
            option = input.nextInt();
            
            if(option != 1 && option != 2)
                System.out.println("Invalid Option! Try again");
        }while(option != 1 && option != 2);
        
        return option;
    }
    
    public boolean Play(){
        board.showBoard();
        if(won() == 0 ){
            System.out.println("----------------------");
            System.out.println("\nTurn "+turn);
            System.out.println("It's turn of Player " + who() );
            
            if(who()==1)
                player1.play(board);
            else
                player2.play(board);
            
            
            if(board.fullBoard()){
                System.out.println("Full Board. Draw!");
                return false;
            }
            who++;
            turn++;

            return true;
        } else{
            if(won() == -1 )
                System.out.println("Player 1 won!");
            else
                System.out.println("Player 2 won!");
            
            return false;
        }
            
    }
    
    public int who(){
        if(who%2 == 1)
            return 1;
        else
            return 2;
    }
    
    public int won(){
        if(board.checkLines() == 1)
            return 1;
        if(board.checkColumns() == 1)
            return 1;
        if(board.checkDiagonals() == 1)
            return 1;
        
        if(board.checkLines() == -1)
            return -1;
        if(board.checkColumns() == -1)
            return -1;
        if(board.checkDiagonals() == -1)
            return -1;
        
        return 0;
    }
    
    
}

-->Player.java

public abstract class Player {
    
    protected int[] attempt = new int[2];
    protected int player;

    
    public Player(int player){
        this.player = player;
    }
    
    public abstract void play(Board board);
    
    public abstract void Try(Board board);

    public boolean checkTry(int[] attempt, Board board){
        if(board.getPosition(attempt) == 0)
            return true;
        else
            return false;

            
    }
    
}

-->Human.java

import java.util.Scanner;

public class Human extends Player{
    public Scanner input = new Scanner(System.in);
    
    public Human(int player){
        super(player);
        this.player = player;
        System.out.println("Player 'Human' created!");
    }
    
    @Override
    public void play(Board board){
        Try(board);
        board.setPosition(attempt, player);
    }
    
    @Override
    public void Try(Board board){
        do{
            do{
                System.out.print("Line: ");
                attempt[0] = input.nextInt();
                
                if( attempt[0] > 3 ||attempt[0] < 1)
                    System.out.println("Invalid line. It's 1, 2 or 3");
                
            }while( attempt[0] > 3 ||attempt[0] < 1);
            
            do{
                System.out.print("Column: ");
                attempt[1] = input.nextInt();
                
                if(attempt[1] > 3 ||attempt[1] < 1)
                    System.out.println("Invalid column. É 1, 2 or 3");
                
            }while(attempt[1] > 3 ||attempt[1] < 1);
            
            attempt[0]--; 
            attempt[1]--;
            
            if(!checkTry(attempt, board))
                System.out.println("Placed already marked. Try other.");
        }while( !checkTry(attempt, board) );
    }
}

-->Computer.java

public class Computer extends Player{
    
    public Computer(int player){
        super(player);
        System.out.println("Player 'Computer' created");
    }
    
    @Override
    public void play(Board board){
        
    }
    
    @Override
    public void Try(Board board){
        
    }
}