tictactoe

commit 1ab6db826eac5460a6a030aa062c16410c9bf4c5
Author: Wilson Gheen <wilson@wilsonrgheen.com>
Date:   Tue, 13 Dec 2022 16:46:18 -0600

Initial commit. Simple tic-tac-toe game.

Diffstat:
A
tictactoe.c
 | 
65
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
A
tictactoe.h
 | 
27
+++++++++++++++++++++++++++

2 files changed, 92 insertions(+), 0 deletions(-)
diff --git a/tictactoe.c b/tictactoe.c
@@ -0,0 +1,65 @@
+#include <stdint.h>
+#include <stdio.h>
+#define TB_IMPL
+#include <termbox.h>
+
+#include "../life/print_box.h"
+#include "tictactoe.h"
+
+#define SIDE_BY_SIDE 0
+
+void print_board_offset(char *board, int offx, int offy, int clear) {
+    if(clear) tb_clear();
+    print_box_offset(7, 7, offx, offy, 0);
+    for(int i=0; i < 9; i++) {
+        print_bw(((i%3) * 2) + 2 + offx, (i/3*2) + 2 + offy, board[i]);
+    }
+    tb_present();
+}
+void print_board(char *board) {
+    print_board_offset(board, 0, 0, 1);
+}
+
+int main(void) {
+    struct tb_event ev;
+    char board[9] = "         ";
+    char winner = 0;
+    char last_played = 'O';
+    void (*get_move)(char*, char) = get_move_from_human;
+    tb_init();
+    if(!SIDE_BY_SIDE)
+        print_board(board);
+    for(int turns=0; !winner && turns <= 9; turns++) {
+        get_move(board, (last_played = (last_played == 'O' ? 'X' : 'O')));
+        if(SIDE_BY_SIDE)
+            print_board_offset(board, turns * 10, 0, 0);
+        else
+            print_board(board);
+        tb_peek_event(&ev, 300);
+        char center = board[4];
+        for(int i=-4; center != ' ' && i < 0; i++) {
+            if(board[4+i] == center && board[4-i] == center) {
+                winner = center;
+                break;
+            }
+        }
+        for(int i=1; !winner && i <= 7; i+=2){
+            if(board[i] == ' ') continue;
+            if((i+1) & 4) { /* column */
+                if(board[i-3] == board[i] && board[i+3] == board[i])
+                    winner = board[i];
+            } else { /* row */
+                if(board[i-1] == board[i] && board[i+1] == board[i])
+                    winner = board[i];
+            }
+        }
+    }
+    if(winner)
+        print_msg("%c wins.", winner);
+    else
+        print_msg("SCRATCH");
+    tb_present();
+    while(tb_poll_event(&ev) == TB_OK)
+        if (ev.type == TB_EVENT_KEY && ev.key == TB_KEY_CTRL_C)
+            tb_shutdown();
+}
diff --git a/tictactoe.h b/tictactoe.h
@@ -0,0 +1,27 @@
+int m = 0;
+
+#define SCRATCH_BOARD "XXOOOXXOX"
+#define X_WINS_COLUMN "XXOXOOXOX"
+#define X_WINS_DIAG   "XOO XOOXX"
+#define X_WINS_ROW    " OOOXOXXX"
+#define O_WINS_COLUMN "OOXOXXOX "
+#define O_WINS_DIAG   "OXXOOXX O"
+#define O_WINS_ROW    " XXXOXOOO"
+
+void get_move_preset_board(char *board, char player) {
+    char desired_board[9] = SCRATCH_BOARD;
+    for(int i=0; i < 9; i++) {
+        if(desired_board[i] == player && board[i] == ' ') {
+            board[i] = player;
+            return;
+        }
+    }
+}
+
+void get_move_from_human(char *board, char player) {
+    int n;
+    print_msg("%c's move? [1-9]: ", player);
+    tb_present();
+    scanf("%d", &n);
+    board[n-1] = player;
+}