Thread: Can anyone help me construct a Java program that plays TicTacToe without using Arrays?

Can anyone help me construct a Java program that plays TicTacToe without using Arrays?

It's an assignment. The point is to see if we can construct a TicTacToe game without using arrays. Here's what I have so far, but I keep getting errors:

import java.util.*;

public class TicTacToe
{
public enum Marker
{
EMPTY,
X,
O
};

private static Marker position1 = Marker.EMPTY;
private static Marker position2 = Marker.EMPTY;
private static Marker position3 = Marker.EMPTY;
private static Marker position4 = Marker.EMPTY;
private static Marker position5 = Marker.EMPTY;
private static Marker position6 = Marker.EMPTY;
private static Marker position7 = Marker.EMPTY;
private static Marker position8 = Marker.EMPTY;
private static Marker position9 = Marker.EMPTY;

private static Marker turn = Marker.X;

public static void main(String[]args)
{
Scanner play = new Scanner(System.in);
do
{
isTie = 0;
while(hasWon()==false)
{
exampleBoard();
printBoard();
hasWon();
turn();
markTheBoard(Marker m, int pos);
if(isTie = true)
{
break;
}
}

exampleBoard();
printBoard();
if(hasWon()=='X')
System.out.println("X wins!");
else if(hasWon()=='O')
System.out.println("O wins!");
else
isTie();

System.out.println("Would you like to play again? (Y/N)");
}
while(play.next().toLowerCase().charAt(0)=='y');
}
}
/**
* This function returns true if the spot is empty, false if not.
*/
public static boolean isValidMove(int pos)
{
String intPos = "position" + pos;
if (pos>0 && pos <10)
{
Marker test = Marker.EMPTY;
switch(pos)
{
case 1: test = position1; break;
case 2: test = position2; break;
case 3: test = position3; break;
case 4: test = position4; break;
case 5: test = position5; break;
case 6: test = position6; break;
case 7: test = position7; break;
case 8: test = position8; break;
case 9: test = position9; break;
}
if (test == Marker.EMPTY)
return true;
else return false;
}
else
{
System.out.println("This is an invalid move, must be an integer from 1 to 9, please try again");
return false;
}
}
/**
* This method will print the board as shown in the above example.
*/

public static void printBoard()
{
System.out.println("| " + position1 + " | " + position2 + " | " + position3 + " |");
System.out.println("-------------");
System.out.println("| " + position4 + " | " + position5 + " | " + position6 + " |");
System.out.println("-------------");
System.out.println("| " + position7 + " | " + position8 + " | " + position9 + " |");
}

public static void exampleBoard()
{
System.out.println("| 1 | 2 | 3 |");
System.out.println("-------------");
System.out.println("| 4 | 5 | 6 |");
System.out.println("-------------");
System.out.println("| 7 | 8 | 9 |");
}

/**
* Checks if a particular player has won.
*
* @param m The player to check
* @return true if the player won, false if not
*/
public static boolean hasWon(Marker m)
{
if(position1 == m && position2 == m && position3 == m) ||
(position1 == m && position4 == m && position7 == m) ||
(position1 == m && position5 == m && position9 == m) ||
(position2 == m && position5 == m && position8 == m) ||
(position3 == m && position5 == m && position7 == m) ||
(position3 == m && position6 == m && position9 == m) ||
(position4 == m && position5 == m && position6 == m) ||
(position7 == m && position8 == m && position9 == m)
return true;
else return false;
}

/**
* Checks if the board is full with no winner
* @return true if the board is full with no winner, false otherwise
*/
public static boolean isTie()
{
if(hasWon = false)
System.out.print("This game is tied.");
}

/**
* Mark the given position with the given marker
* @param m The marker of the player given
* @param pos The position that we are marking
*/
public static void markTheBoard(Marker m, int pos)
{
Scanner play = new Scanner(System.in);
System.out.print("What is your position? ");
int position = play.nextInt();
char piece;
if(m == turn)
piece = 'X';
else
piece = 'O';

if(position == 1)
if(position1 == Marker.Empty)
position1 = piece;
else markTheBoard(m);
if(position == 2)
if(position2 == Marker.Empty)
position2 = piece;
else markTheBoard(m);
if(position == 3)
if(position3 == Marker.Empty)
position3 = piece;
else markTheBoard(m);
if(position == 4)
if(position4 == Marker.Empty)
position4 = piece;
else markTheBoard(m);
if(position == 5)
if(position5 == Marker.Empty)
position5 = piece;
else markTheBoard(m);
if(position == 6)
if(position6 == Marker.Empty)
position6 = piece;
else markTheBoard(m);
if(position == 7)
if(position7 == Marker.Empty)
position7 = piece;
else markTheBoard(m);
if(position == 8)
if(position8 == Marker.Empty)
position8 = piece;
else markTheBoard(m);
if(position == 9)
if(position9 == Marker.Empty)
position9 = piece;
else markTheBoard(m);
}
}
}

I added brackets in and still received the same errors.

some of the errors are:

error: illegal start of expression
markTheBoard(Marker m, int pos);
error: not a statement
markTheBoard(Marker m, int pos);
error: class, interface, or enum expected
public static boolean isValidMove(int pos)

I don't know how to upload the error screen. So I just used Paint to take screen pics and attaching it to this thread:

javaerror.jpgjavaerror2.jpgjavaerror3.jpgjavaerror4.jpg

Here's what I have again:

import java.util.*;

public class TicTacToe
{
public enum Marker
{
EMPTY,
X,
O
};

private static Marker position1 = Marker.EMPTY;
private static Marker position2 = Marker.EMPTY;
private static Marker position3 = Marker.EMPTY;
private static Marker position4 = Marker.EMPTY;
private static Marker position5 = Marker.EMPTY;
private static Marker position6 = Marker.EMPTY;
private static Marker position7 = Marker.EMPTY;
private static Marker position8 = Marker.EMPTY;
private static Marker position9 = Marker.EMPTY;

private static Marker turn = Marker.X;

public static void main(String[]args)
{
Scanner play = new Scanner(System.in);
do
{
isTie = 0;
while(hasWon()==false)
{
exampleBoard();
printBoard();
hasWon();
turn();
markTheBoard(Marker m, int pos);
if(isTie = true)
{
break;
}
}

exampleBoard();
printBoard();
if(hasWon()=='X')
{
System.out.println("X wins!");
}
else if(hasWon()=='O')
{
System.out.println("O wins!");
}
else
{
isTie();
}

System.out.println("Would you like to play again? (Y/N)");
}
while(play.next().toLowerCase().charAt(0)=='y');
}
}
/**
* This function returns true if the spot is empty, false if not.
*/
public static boolean isValidMove(int pos)
{
String intPos = "position" + pos;
if (pos>0 && pos <10)
{
Marker test = Marker.EMPTY;
switch(pos)
{
case 1: test = position1; break;
case 2: test = position2; break;
case 3: test = position3; break;
case 4: test = position4; break;
case 5: test = position5; break;
case 6: test = position6; break;
case 7: test = position7; break;
case 8: test = position8; break;
case 9: test = position9; break;
}
if (test == Marker.EMPTY)
{
return true;
}
else
{
return false;
}
}
else
{
System.out.println("This is an invalid move, must be an integer from 1 to 9, please try again");
return false;
}
}
/**
* This method will print the board as shown in the above example.
*/

public static void printBoard()
{
System.out.println("| " + position1 + " | " + position2 + " | " + position3 + " |");
System.out.println("-------------");
System.out.println("| " + position4 + " | " + position5 + " | " + position6 + " |");
System.out.println("-------------");
System.out.println("| " + position7 + " | " + position8 + " | " + position9 + " |");
}

public static void exampleBoard()
{
System.out.println("| 1 | 2 | 3 |");
System.out.println("-------------");
System.out.println("| 4 | 5 | 6 |");
System.out.println("-------------");
System.out.println("| 7 | 8 | 9 |");
}

/**
* Checks if a particular player has won.
*
* @param m The player to check
* @return true if the player won, false if not
*/
public static boolean hasWon(Marker m)
{
if(position1 == m && position2 == m && position3 == m) ||
(position1 == m && position4 == m && position7 == m) ||
(position1 == m && position5 == m && position9 == m) ||
(position2 == m && position5 == m && position8 == m) ||
(position3 == m && position5 == m && position7 == m) ||
(position3 == m && position6 == m && position9 == m) ||
(position4 == m && position5 == m && position6 == m) ||
(position7 == m && position8 == m && position9 == m)
{
return true;
}
else
{
return false;
}
}

/**
* Checks if the board is full with no winner
* @return true if the board is full with no winner, false otherwise
*/
public static boolean isTie()
{
if(hasWon = false)
{
System.out.print("This game is tied.");
}
}

/**
* Mark the given position with the given marker
* @param m The marker of the player given
* @param pos The position that we are marking
*/
public static void markTheBoard(Marker m, int pos)
{
Scanner play = new Scanner(System.in);
System.out.print("What is your position? ");
int position = play.nextInt();
char piece;
if(m == turn)
{
piece = 'X';
}
else
{
piece = 'O';
}

if(position == 1)
{
if(position1 == Marker.Empty)
{
position1 = piece;
}
else markTheBoard(m);
}
if(position == 2)
{
if(position2 == Marker.Empty)
{
position2 = piece;
}
else markTheBoard(m);
}
if(position == 3)
{
if(position3 == Marker.Empty)
{
position3 = piece;
}
else markTheBoard(m);
}
if(position == 4)
{
if(position4 == Marker.Empty)
{
position4 = piece;
}
else markTheBoard(m);
}
if(position == 5)
{
if(position5 == Marker.Empty)
{
position5 = piece;
}
else markTheBoard(m);
}
if(position == 6)
{
if(position6 == Marker.Empty)
{
position6 = piece;
}
else markTheBoard(m);
}
if(position == 7)
{
if(position7 == Marker.Empty)
{
position7 = piece;
}
else markTheBoard(m);
}
if(position == 8)
{
if(position8 == Marker.Empty)
{
position8 = piece;
}
else markTheBoard(m);
}
if(position == 9)
{
if(position9 == Marker.Empty)
{
position9 = piece;
}
else markTheBoard(m);
}
}
}

I don't use an IDE. The instructor said to not use an IDE, just use Notepad++ and "cmd". I'll attach the error images again here. I had to use Paint to take the screen pics:

javaerror.jpg
javaerror2.jpg
javaerror3.jpg
javaerror4.jpg

Oh cool! Thank you. Here's the paste:

C:\Users\Thao\Java\jdk1.7.0_40\bin>javac TicTacToe.java
TicTacToe.java:57: error: ')' expected
markTheBoard(Marker m, int pos);
^
TicTacToe.java:57: error: illegal start of expression
markTheBoard(Marker m, int pos);
^
TicTacToe.java:57: error: ';' expected
markTheBoard(Marker m, int pos);
^
TicTacToe.java:57: error: not a statement
markTheBoard(Marker m, int pos);
^
TicTacToe.java:57: error: ';' expected
markTheBoard(Marker m, int pos);
^
TicTacToe.java:87: error: class, interface, or enum expected
public static boolean isValidMove(int pos)
^
TicTacToe.java:90: error: class, interface, or enum expected
if (pos>0 && pos <10)
^
TicTacToe.java:93: error: class, interface, or enum expected
switch(pos)
^
TicTacToe.java:95: error: class, interface, or enum expected
case 1: test = position1; break;
^
TicTacToe.java:96: error: class, interface, or enum expected
case 2: test = position2; break;
^
TicTacToe.java:96: error: class, interface, or enum expected
case 2: test = position2; break;
^
TicTacToe.java:97: error: class, interface, or enum expected
case 3: test = position3; break;
^
TicTacToe.java:97: error: class, interface, or enum expected
case 3: test = position3; break;
^
TicTacToe.java:98: error: class, interface, or enum expected
case 4: test = position4; break;
^
TicTacToe.java:98: error: class, interface, or enum expected
case 4: test = position4; break;
^
TicTacToe.java:99: error: class, interface, or enum expected
case 5: test = position5; break;
^
TicTacToe.java:99: error: class, interface, or enum expected
case 5: test = position5; break;
^
TicTacToe.java:100: error: class, interface, or enum expected
case 6: test = position6; break;
^
TicTacToe.java:100: error: class, interface, or enum expected
case 6: test = position6; break;
^
TicTacToe.java:101: error: class, interface, or enum expected
case 7: test = position7; break;
^
TicTacToe.java:101: error: class, interface, or enum expected
case 7: test = position7; break;
^
TicTacToe.java:102: error: class, interface, or enum expected
case 8: test = position8; break;
^
TicTacToe.java:102: error: class, interface, or enum expected
case 8: test = position8; break;
^
TicTacToe.java:103: error: class, interface, or enum expected
case 9: test = position9; break;
^
TicTacToe.java:103: error: class, interface, or enum expected
case 9: test = position9; break;
^
TicTacToe.java:104: error: class, interface, or enum expected
}
^
TicTacToe.java:108: error: class, interface, or enum expected
}
^
TicTacToe.java:112: error: class, interface, or enum expected
}
^
TicTacToe.java:117: error: class, interface, or enum expected
return false;
^
TicTacToe.java:118: error: class, interface, or enum expected
}
^
TicTacToe.java:124: error: class, interface, or enum expected
public static void printBoard()
^
TicTacToe.java:127: error: class, interface, or enum expected
System.out.println("-------------");
^
TicTacToe.java:128: error: class, interface, or enum expected
System.out.println("| " + position4 + " | " + position5 + " | "
+ position6 + " |");
^
TicTacToe.java:129: error: class, interface, or enum expected
System.out.println("-------------");
^
TicTacToe.java:130: error: class, interface, or enum expected
System.out.println("| " + position7 + " | " + position8 + " | "
+ position9 + " |");
^
TicTacToe.java:131: error: class, interface, or enum expected
}
^
TicTacToe.java:133: error: class, interface, or enum expected
public static void exampleBoard()
^
TicTacToe.java:136: error: class, interface, or enum expected
System.out.println("-------------");
^
TicTacToe.java:137: error: class, interface, or enum expected
System.out.println("| 4 | 5 | 6 |");
^
TicTacToe.java:138: error: class, interface, or enum expected
System.out.println("-------------");
^
TicTacToe.java:139: error: class, interface, or enum expected
System.out.println("| 7 | 8 | 9 |");
^
TicTacToe.java:140: error: class, interface, or enum expected
}
^
TicTacToe.java:148: error: class, interface, or enum expected
public static boolean hasWon(Marker m)
^
TicTacToe.java:160: error: class, interface, or enum expected
}
^
TicTacToe.java:164: error: class, interface, or enum expected
}
^
TicTacToe.java:171: error: class, interface, or enum expected
public static boolean isTie()
^
TicTacToe.java:176: error: class, interface, or enum expected
}
^
TicTacToe.java:184: error: class, interface, or enum expected
public static void markTheBoard(Marker m, int pos)
^
TicTacToe.java:187: error: class, interface, or enum expected
System.out.print("What is your position? ");
^
TicTacToe.java:188: error: class, interface, or enum expected
int position = play.nextInt();
^
TicTacToe.java:189: error: class, interface, or enum expected
char piece;
^
TicTacToe.java:190: error: class, interface, or enum expected
if(m == turn)
^
TicTacToe.java:193: error: class, interface, or enum expected
}
^
TicTacToe.java:197: error: class, interface, or enum expected
}
^
TicTacToe.java:204: error: class, interface, or enum expected
}
^
TicTacToe.java:206: error: class, interface, or enum expected
}
^
TicTacToe.java:212: error: class, interface, or enum expected
}
^
TicTacToe.java:214: error: class, interface, or enum expected
}
^
TicTacToe.java:220: error: class, interface, or enum expected
}
^
TicTacToe.java:222: error: class, interface, or enum expected
}
^
TicTacToe.java:228: error: class, interface, or enum expected
}
^
TicTacToe.java:230: error: class, interface, or enum expected
}
^
TicTacToe.java:236: error: class, interface, or enum expected
}
^
TicTacToe.java:238: error: class, interface, or enum expected
}
^
TicTacToe.java:244: error: class, interface, or enum expected
}
^
TicTacToe.java:246: error: class, interface, or enum expected
}
^
TicTacToe.java:252: error: class, interface, or enum expected
}
^
TicTacToe.java:254: error: class, interface, or enum expected
}
^
TicTacToe.java:260: error: class, interface, or enum expected
}
^
TicTacToe.java:262: error: class, interface, or enum expected
}
^
TicTacToe.java:268: error: class, interface, or enum expected
}
^
TicTacToe.java:270: error: class, interface, or enum expected
}
^
72 errors

I'm not exactly sure why the instructor had us use "markTheBoard(Marker m, int pos)". I don't know what to do with 2 parameters, but he specifically said we cannot change it. I don't know what the "m" is for really....