Free response #6

Tic-tac-toe.txt

Let's write (part of) a tic-tac-toe game! 

Let's suppose the game board is represented using a 3x3 2D array of 
integers like this:

______________________
|      |      |      |
|   1  |   O  |   O  |
|______|______|______|
|      |      |      |
|  -1  |   1  |  -1  |
|______|______|______|
|      |      |      |
|  -1  |   1  |   O  |
|______|______|______|

Here, a 1 represents an "X", and a "-1" represents a "O", and 0
means no player has played in that slot yet.

I want you to write a method that tells me, given any board, whether
someone has gotten 3-in-a-row yet. For example, in the above board,
if we add a 1 in row 0 column 1, then the player who plays 1 ("X") 
will have 3-in-a-row.

/* Returns true if there are three of the same thing in a row
 * (which means that there's a winner). Assume that the board is
 * a valid game, i.e. there's not going to be like, only 1s or only 
 * -1s, and there's going to be the right number 1s and -1s like there 
 * should be when one player goes after the other. 
 */
public static boolean isThereAWinner(int[][] board) {
	/* TODO */
}