switching between 2 people in TicTacToe.java

[yolkman]

How do you alternate between 2 human players?

[D_C]

int i;
while((i <= 9) && (!win)) // 9 squares, so 9 inputs.
{
  System.out.println("Player " + (i%2) + "'s turn");
  win = GetInputAndUpdate(((i%2)==1));
  i++;
}
if(win)
{
  System.out.println("Player " + ((i-1)%2) + " wins!");
}

Effectively, you are passing a boolean value that is true if it's player 1's turn to input data. Also, win is a boolean value that is returned if a player has one the game.

If you have an N player game, then do (i % N).

[yolkman]

I have a boolean method named makeMove that tries to make a move and returns true if the move is valid and false if it isn't.

I also have a public String promptMove() method that prompts a player to move a piece on the board.

	public boolean makeMove( String move ){
		
		
		for(int row=0; row<3; row++){
		
		
			for(int col=0; col<3; col++){
			
			
			if(board[row][col]=="")
			move.equals(board[row][col]);
			
			canvas.repaint(board, row, col);
			
			return true;
			
			}
		}	
		
			
			return false;
}

   public String promptMove(){
		
		while(!gameOver()){
			
			currentPlayer=playerOne;
			
			if(currentPlayer.makeMove(String move))
			
			currentPlayer=playerTwo;
			
			if(currentPlayer.makeMove(String move))
			currentPlayer=playerOne;
			
			if(currentPlayer.makeMove(String move))
			currentPlayer=playerTwo;
			
			if(currentPlayer.makeMove(String move))
			currentPlayer=playerOne;
			
			if(currentPlayer.makeMove(String move))
			currentPlayer=playerTwo;
			
			if(currentPlayer.makeMove(String move))
			currentPlayer=playerOne;
			
			if(currentPlayer.makeMove(String move))
			currentPlayer=playerTwo;
			
			if(currentPlayer.makeMove(String move))
			currentPlayer=playerOne;			
			
			
			
			}
		
		
	}

How do I set up a for loop in the promptMove method that will loop between playerOne which is "X" and playerTwo which is "O"?

[yolkman]

I've finished all the code but I can't get the "X" and "O"s to show up on the board or to switch between human players.

package csc216.project2;

import javax.swing.JOptionPane;




public class TicTacToe implements GameBoard{
	
	private GameCanvas canvas;
	
	private String [] [] board;
	
	private String currentPlayer;
	
	private String playerOne="X";
	
	private String playerTwo="O";
	
	private int row;
	
	private int col;
	
	
	
	public TicTacToe(){
		
		canvas=new GameCanvas();
		
		currentPlayer=null;
		
		board=new String[3][3];
		
		row=3;
		
		col=3;
		
		
		}
		
	/**
	 *Draws current state of the board
	 */
	
	public void displayBoard(){
		
		canvas.repaint(board, row, col);
		
		
		
	    
	    }
	    
	/**
	 *Query whether the game is completed
     *@return TRUE if game is over, FALSE otherwise
	 */			
				
	public boolean gameOver(){
		
		for(int row=0; row<3; row++ )
			for(int col=0; col<3; col++)
			
			
			if(board[0][col]=="X" || board[0][col]=="O")
			return true;
			
			else if(board[1][col]=="X" || board[1][col]=="O")
			return true;
			
			else if(board[2][col]=="X" || board[2][col]=="O")
			return true;
			
			else if(board[row][0]=="X" || board[row][0]=="O")
			return true;
			
			else if(board[row][1]=="X" || board[row][1]=="O")
			return true;
			
			else if(board[row][2]=="X" || board[row][2]=="O")
			return true;
			
			else if(board[0][0]=="X" && board[1][1]=="X" && board[2][2]=="X")
			return true;
			
			else if(board[0][0]=="O" && board[1][1]=="O" && board[2][2]=="O")
			return true;
			
			else if(board[2][0]=="X" && board[1][1]=="X" && board[0][2]=="X")
			return true;
			
			else if(board[2][0]=="O" && board[1][1]=="O" && board[0][2]=="O")
			return true;
			
			else if(board[row][col]!="")
			return true;
			
		   
			
			return false;
			
			
			
	}
	
	/**
	 *Initialize the board to a starting state
	 */
	
	public void initBoard(){
		
			for(int row=0; row<3; row++)
			
				for(int col=0; col<3; col++)
				
				board[row][col]="";
				
				canvas.repaint(board, row, col);
				

		
	}
	
	/**
	 * Attempt to move a playing piece on the board
     *@param move the proposed move
     *@return TRUE if the move is valid, FALSE otherwise
     */
	
	public boolean makeMove(String move){
		
		
			for(int row=0; row<3; row++)
			
		
				for(int col=0; col<3; col++)
				
		
				if(board[row][col]==""){
					
				board[row][col]=move;
				
				return true;
				
				}
				
				else{
				
				String msg = "Invalid move " + move + " entered.";
				JOptionPane.showMessageDialog( null, msg, "Invalid Move", JOptionPane.ERROR_MESSAGE );
				
				return false;
				
				}
				
				return false;
				
	}
	
	/**
	 *Prompt a player to move a playing piece on the board
	 */
	 
	public String promptMove(){
		
		currentPlayer=playerOne;
		
		String inp = JOptionPane.showInputDialog( null, "Enter a valid move:" );
		
		if(currentPlayer==playerOne){
		
		return "X";
		}
		
		String inp1 = JOptionPane.showInputDialog( null, "Enter a valid move:" );
		
		
		
		if(currentPlayer==playerTwo)
		
		board[row][col]="O";
		
		return "O";
		
		
	}
	
	
	public void quit(){
		
		canvas.dispose();
		
		System.exit(1);
	}
	
	public static void main(String args[]){
		
		GameBoard gBoard=new TicTacToe();
		
		gBoard.initBoard();
		
		gBoard.promptMove();
		
		gBoard.makeMove("X");
		
		gBoard.displayBoard();
		
		
		

}

}

[D_C]

You get the user input as inpl, and then do absolutely nothing with it. You assume it magically gets transformed into a row and a col value. You need to decode inpl into row and col. Otherwise, you keep changing game[3][3], and the last entry should be game[2][2].

[yolkman]

You get the user input as inpl, and then do absolutely nothing with it. You assume it magically gets transformed into a row and a col value. You need to decode inpl into row and col. Otherwise, you keep changing game[3][3], and the last entry should be game[2][2].

I am unclear as to what you have just said.

[rea haris]

could someone plz help me with coding for interaction between client and server to run tictactoe.i need that as soon as possible..