井字游戏

int main() {
	int player = 0; //1,2  当前玩家
	int winner = 0; //the winning player 获胜玩家
	int choice = 0;

	int row = 0;
	int column = 0;
	char board[3][3] = { { '1', '2', '3' }, { '4', '5', '6' },
			{ '7', '8', '9' } };

	for (int i = 0; i < STEP_NUM && winner == 0; i++) {
		printf("\n\n");
		printf(" %c | %c | %c \n", board[0][0], board[0][1], board[0][2]);
		printf("---+---+---\n");
		printf(" %c | %c | %c \n", board[1][0], board[1][1], board[1][2]);
		printf("---+---+---\n");
		printf(" %c | %c | %c \n", board[2][0], board[2][1], board[2][2]);

		player = i % 2 + 1;

		do {
			printf("player: %d ,输入你的选择:", player);
			scanf("%d", &choice);

			row = --choice / 3;
			column = choice % 3;
		} while (choice < 0 || choice > 9);
		/* */
		board[row][column] = (player == 1) ? 'X' : 'O';

		/*check for a winner line */
		if ((board[0][0] == board[1][1] && board[0][0] == board[1][1])
				|| (board[0][2] == board[1][1] && board[2][0] == board[1][1]))
			winner = player;
		else
			for (int line = 0; line < 3; line++) {
				if ((board[line][0] == board[line][1] && board[line][0]
						== board[line][2]) || (board[0][line] == board[1][line]
						&& board[0][line] == board[2][line])) {
					winner = player;
					break;
				}
			}
	}

	return 0;
}