.

a. Create a class TicTacToe that will enable you to write a program to play Tic-Tac-Toe. The class contains a private 3-by-3 two-dimensional integer array where 1 represents X, 0 represents available/empty, -1 represents O. The constructor should initialize the board elements to empty. Allow two human players. Wherever the first player moves, place a 1 in the specified square, and place a -1 wherever the second player moves. Each move must be to an empty square. After each move, determine whether the game has been won and whether its a draw. If it is a win then print which player won and if its a draw then reinitialize the array to empty and restart the game: this could be done using a sentinel controlled loop. You are provided with a class which contains a method that takes an argument of your array and prints the board. Use this method to print the board after every move. b. Feeling ambitious, modify your program so that the computer makes the moves for one of the players. Also, allow the player to specify whether he or she wants to go first or second. Use an enumeration to represent the value in each cell of the array. The enumerations constants should be named X, O and EMPTY (for a position that does not contain an X or an O). The constructor should initialize the board elements to EMPTY. Wherever the first player moves, place an X in the specified square, and place an O wherever the second player moves. Each move must be to an empty square. After each move, determine whether the game has been won and whether its a draw. If it is a win then print which player won and if its a draw then reinitialize the array to empty and restart the game: this could be done using a sentinel controlled loop. You are provided with a class which contains a method that takes an argument of your array and prints the board. Use this method to print the board after every move. If your original array is enum type then you would need to convert it into integer and then use this method.

//given program

package Chapter9;

public class TicTacToePrinter

{

//1 represent X and -1 represents O

public void printBoard(int array[][])

{

//check if array is of the dimension 3X3

if(array.length==3 && array[0].length==3 && array[1].length==3

&& array[2].length==3)

;

else

{

System.out.println("Your array must be of 3X3 dimension");

return;

}

String values[][] = new String[3][3];

//check if array contains anything else than 1, 0, -1

//1 means X, 0 means available, -1 means O

for(int index1=0;index1

{

for(int index2=0;index2

{

if(array[index1][index2]>1 || array[index1][index2]<-1)

{

System.out.println("Your array contains invalid values");

System.out.println("Correct values are: 1=X, 0=available, -1=O");

return;

}

if(array[index1][index2]==1)

{

values[index1][index2]= "X";

}

else if (array[index1][index2]==-1)

{

values[index1][index2]= "O";

}

else

{

values[index1][index2]= "-";

}

}

}

System.out.println();

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

System.out.println();

System.out.printf("%-8s %2s %2s %2s%n", "column \u2192", "0","1","2");

System.out.println("row \u2193");

System.out.printf("%-8s %2s | %2s | %2s%n", "0", values[0][0],values[0][1],values[0][2]);

System.out.printf("%-8s %2s | %2s | %2s%n", "1", values[1][0],values[1][1],values[1][2]);

System.out.printf("%-8s %2s | %2s | %2s%n", "2", values[2][0],values[2][1],values[2][2]);

}

}

//second provided class

public class TicTacToePrinterDriver

{

public static void main(String a[])

{

int arr[][] = {

{-1,0,1},

{1,1,-1},

{-1,0,1}

};

TicTacToePrinter t = new TicTacToePrinter();

t.printBoard(arr);

}

}