nelsbrock/dev-tictactoe
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fix swapped x and y coordinates

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nelsbrock
2026-04-04 21:34:13 +02:00
parent 12eba69eb1
commit 610bc1c07c
2 changed files with 6 additions and 6 deletions
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README.md
+4 -4
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@@ -22,13 +22,13 @@ After loading the module, player X can write grid coordinates
(ranging from 1 to 3, format `XY`) to `/dev/tictactoe` to make their first move: (ranging from 1 to 3, format `XY`) to `/dev/tictactoe` to make their first move:
```console ```console
# echo 12 > /dev/tictactoe # echo 22 > /dev/tictactoe
``` ```
After player X has made their move, player O can do the same: After player X has made their move, player O can do the same:
```console ```console
# echo 22 > /dev/tictactoe # echo 13 > /dev/tictactoe
``` ```
To inspect the current state of the game, simply read from `/dev/tictactoe`: To inspect the current state of the game, simply read from `/dev/tictactoe`:
@@ -39,9 +39,9 @@ To inspect the current state of the game, simply read from `/dev/tictactoe`:
``` ```
##### #####
# X #
# O #
# # # #
# X #
#O #
##### #####
It's X's turn! It's X's turn!
tictactoe_game.c
+2 -2
View File
@@ -111,12 +111,12 @@ static char tictactoe_game_check_winner(ttt_game_t *game)
*/ */
int tictactoe_game_make_turn(ttt_game_t *game, size_t x, size_t y) int tictactoe_game_make_turn(ttt_game_t *game, size_t x, size_t y)
{ {
if (game->board[x][y] != ' ') { if (game->board[y][x] != ' ') {
pr_notice("position already occupied\n"); pr_notice("position already occupied\n");
return -1; return -1;
} }
game->board[x][y] = game->next_turn; game->board[y][x] = game->next_turn;
game->winner = tictactoe_game_check_winner(game); game->winner = tictactoe_game_check_winner(game);
if (game->next_turn == 'X') if (game->next_turn == 'X')