From 932360133471de98f93c2b7fd22e788f6ef8fc02 Mon Sep 17 00:00:00 2001
From: borislav nikolov <borislav@fastmail.com>
Date: Mon, 14 Aug 2023 12:11:24 +0200
Subject: [PATCH] yesterday

---
 week-047.md | 358 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 358 insertions(+)

diff --git a/week-047.md b/week-047.md
index a58c5c14..ef9d6c99 100644
--- a/week-047.md
+++ b/week-047.md
@@ -572,3 +572,361 @@ int main() {
     fclose(pF);
 }
 ```
+
+## [DAY-353] tic tac toe
+
+another day another tictactoe
+
+fix the following implementation to have 4x4 grid
+
+> she wrote
+```
+
+#include <stdio.h>
+struct board {
+    char a0;
+    char a1;
+    char a2;
+    char a3;
+    char b0;
+    char b1;
+    char b2;
+    char b3;
+    char c0;
+    char c1;
+    char c2;
+    char c3;
+    char d0;
+    char d1;
+    char d2;
+    char d3;
+};
+
+struct user_input {
+    char row;
+    char col;
+};
+
+void board_print(struct board game) {
+    printf("  a b c d\n");
+    printf("0 %c %c %c %c\n", game.a0, game.b0, game.c0, game.d0);
+    printf("1 %c %c %c %c\n", game.a1, game.b1, game.c1, game.d1);
+    printf("2 %c %c %c %c\n", game.a2, game.b2, game.c2, game.d2);
+    printf("3 %c %c %c %c\n", game.a3, game.b3, game.c3, game.d3);
+    printf("\n");
+}
+
+int board_set(struct board *game, char symbol, struct user_input ui) {
+    int valid_move = 1;
+    if (ui.col == 'a' && ui.row == '0') {
+        game->a0 = symbol;
+    } else if (ui.col == 'a' && ui.row == '1') {
+        game->a1 = symbol;
+    } else if (ui.col == 'a' && ui.row == '2') {
+        game->a2 = symbol;
+    } else if (ui.col == 'a' && ui.row == '3') {
+        game->a3 = symbol;
+    } else if (ui.col == 'b' && ui.row == '0') {
+        game->b0 = symbol;
+    } else if (ui.col == 'b' && ui.row == '1') {
+        game->b1 = symbol;
+    } else if (ui.col == 'b' && ui.row == '2') {
+        game->b2 = symbol;
+    } else if (ui.col == 'b' && ui.row == '3') {
+        game->b3 = symbol;
+    } else if (ui.col == 'c' && ui.row == '0') {
+        game->c0 = symbol;
+    } else if (ui.col == 'c' && ui.row == '1') {
+        game->c1 = symbol;
+    } else if (ui.col == 'c' && ui.row == '2') {
+        game->c2 = symbol;
+    } else if (ui.col == 'c' && ui.row == '3') {
+        game->c3 = symbol;
+    } else if (ui.col == 'd' && ui.row == '0') {
+        game->d0 = symbol;
+    } else if (ui.col == 'd' && ui.row == '1') {
+        game->d1 = symbol;
+    } else if (ui.col == 'd' && ui.row == '2') {
+        game->d2 = symbol;
+    } else if (ui.col == 'd' && ui.row == '3') {
+        game->d3 = symbol;
+    }else {
+        valid_move = 0;
+    }
+    return valid_move;
+}
+
+struct user_input get_user_input(char symbol) {
+    struct user_input ui = {0};
+    printf("%c> ", symbol);
+    ui.col = getchar();
+    ui.row = getchar();
+    getchar(); // ignore the new line
+    return ui;
+}
+
+void toggle_symbol(char *symbol) {
+    // if the symbol is X, set it to 0, if its 0, set it to X
+    if (*symbol == 'X') {
+        *symbol = '0';
+    } else {
+        *symbol = 'X';
+    }
+}
+int check_win(struct board game, char symbol){
+    // Check rows
+    if ((game.a0 == symbol && game.a1 == symbol && game.a2 == symbol && game.a3 == symbol) ||
+        (game.b0 == symbol && game.b1 == symbol && game.b2 == symbol && game.b3 == symbol) ||
+        (game.d0 == symbol && game.d1 == symbol && game.d2 == symbol && game.d3 == symbol) ||
+        (game.c0 == symbol && game.c1 == symbol && game.c2 == symbol && game.c3 == symbol)) {
+        return 1; // Winning condition met
+    }
+
+    // Check columns
+    if ((game.a0 == symbol && game.b0 == symbol && game.c0 == symbol && game.d0 == symbol) ||
+        (game.a1 == symbol && game.b1 == symbol && game.c1 == symbol && game.d1 == symbol) ||
+        (game.a3 == symbol && game.b3 == symbol && game.c3 == symbol && game.d3 == symbol) ||
+        (game.a2 == symbol && game.b2 == symbol && game.c2 == symbol && game.d2 == symbol)) {
+        return 1; // Winning condition met
+    }
+
+    // Check diagonals
+    if ((game.a0 == symbol && game.b1 == symbol && game.c2 == symbol && game.d3 == symbol) ||
+        (game.a3 == symbol && game.b2 == symbol && game.c1 == symbol && game.d0 == symbol)) {
+        return 1; // Winning condition met
+    }
+
+    return 0; // Winning condition not met
+}
+
+int main(void){
+    char current_symbol = 'X';
+    struct board game_board = {
+        .a0 = '-',
+        .a1 = '-',
+        .a2 = '-',
+        .a3 = '-',
+        .b0 = '-',
+        .b1 = '-',
+        .b2 = '-',
+        .b3 = '-',
+        .c0 = '-',
+        .c1 = '-',
+        .c2 = '-',
+        .c3 = '-',
+        .d0 = '-',
+        .d1 = '-',
+        .d2 = '-',
+        .d3 = '-'
+    }; 
+
+    while(1) {
+        board_print(game_board);
+        struct user_input input = get_user_input(current_symbol);
+        if (board_set(&game_board, current_symbol, input)) {
+            // only change the symbol if the move is valid
+            toggle_symbol(&current_symbol);
+        }
+        if(check_win(game_board,current_symbol)){
+            printf("YOU WIN\n");
+            break;
+        }
+    }
+}
+```
+
+
+change the following implementation to have 9 variables instead of an array
+
+```
+#include <stdio.h>
+
+void print_board(char *b) {
+    printf("%c %c %c\n",b[0], *(b + 1), b[2]);
+    printf("%c %c %c\n",b[3], b[4], b[5]);
+    printf("%c %c %c\n",b[6], b[7], b[8]);
+}
+int check_win(char *b){
+    if (b[0] != '-' && b[0] == b[1] && b[1] == b[2]) {
+        return 1;
+    }
+    if (b[3] != '-'  && b[3] == b[4] && b[4] == b[5]) {
+        return 1;
+    }
+    if (b[0] != '-'  && b[0] == b[3] && b[3] == b[6]) {
+        return 1;
+    }
+    if (b[1] != '-'  && b[1] == b[4] && b[4] == b[7]) {
+        return 1;
+    }
+    if (b[2] != '-'  && b[2] == b[5] && b[5] == b[8]) {
+        return 1;
+    }
+    if (b[6] != '-'  && b[6] == b[7] && b[7] == b[8]) {
+        return 1;
+    }
+    if (b[0] != '-'  && b[0] == b[4] && b[4] == b[8]) {
+        return 1;
+    }
+    if (b[2] != '-'  && b[2] == b[4] && b[4] == b[6]) {
+        return 1;
+    }
+    return 0;
+}
+
+int main(void) {
+    char board[9] = {'-','-','-','-','-','-','-','-','-'};
+    char symbol = '0';
+
+
+    while(1) {
+        print_board(board);
+        char str[3];
+        printf("%c>",symbol);
+        scanf("%2s",str);
+        if (str[0] == 'a' && str[1] == '1') {
+            board[0] = symbol;
+        }
+        if (str[0] == 'b' && str[1] == '1') {
+            board[3] = symbol;
+        }
+        if (str[0] == 'c' && str[1] == '1') {
+            board[6] = symbol;
+        }
+        if (str[0] == 'a' && str[1] == '2') {
+            board[1] = symbol;
+        }
+        if (str[0] == 'a' && str[1] == '3') {
+            board[2] = symbol;
+        }
+        if (str[0] == 'b' && str[1] == '2') {
+            board[4] = symbol;
+        }
+        if (str[0] == 'b' && str[1] == '3') {
+            board[5] = symbol;
+        }
+        if (str[0] == 'c' && str[1] == '2') {
+            board[7] = symbol;
+        }
+        if (str[0] == 'c' && str[1] == '3') {
+            board[8] = symbol;
+        }
+
+        if (check_win(board)) {
+            print_board(board);
+            printf("%c WINS\n", symbol);
+            break;
+        }
+
+        if (symbol == '0') {
+            symbol = 'X';
+        } else {
+            symbol = '0';
+        }
+    }
+}
+```
+
+
+> she wrote:
+
+
+```
+#include <stdio.h>
+
+void print_board(char a1, char a2, char a3, char b1, char b2, char b3, char c1, char c2, char c3) {
+    printf("%c %c %c\n",a1, a2, a3);
+    printf("%c %c %c\n",b1, b2, b3);
+    printf("%c %c %c\n",c1, c2, c3);
+}
+
+int check_win(char a1, char a2, char a3, char b1, char b2, char b3, char c1, char c2, char c3){
+    if (a1 != '-' && a1 == a2 && a2 == a3) {
+        return 1;
+    }
+    if (b1 != '-'  && b1 == b2 && b2 == b3) {
+        return 1;
+    }
+    if (a1 != '-'  && a1 == b1 && b1 == c1) {
+        return 1;
+    }
+    if (a2 != '-'  && a2 == b2 && b2 == c2) {
+        return 1;
+    }
+    if (a3 != '-'  && a3 == b3 && b3 == c3) {
+        return 1;
+    }
+    if (c1 != '-'  && c1 == c2 && c2 == c3) {
+        return 1;
+    }
+    if (a1 != '-'  && a1 == b2 && b2 == c3) {
+        return 1;
+    }
+    if (a3 != '-'  && a3 == b2 && b2 == c1) {
+        return 1;
+    }
+    return 0;
+}
+
+int main(void) {
+    char a1 = '-', a2 ='-', a3 = '-' ;
+    char b1 = '-', b2 ='-', b3 = '-' ;
+    char c1 = '-', c2 ='-', c3 = '-' ;
+    char symbol = '0';
+
+
+    while(1) {
+        print_board(a1,a2,a3,b1,b2,b3,c1,c2,c3);
+        char str[3];
+        printf("%c>",symbol);
+        scanf("%2s",str);
+        if (str[0] == 'a' && str[1] == '1') {
+            a1 = symbol;
+        }
+        if (str[0] == 'b' && str[1] == '1') {
+            b1 = symbol;
+        }
+        if (str[0] == 'c' && str[1] == '1') {
+           c1 = symbol;
+        }
+        if (str[0] == 'a' && str[1] == '2') {
+            a2 = symbol;
+        }
+        if (str[0] == 'a' && str[1] == '3') {
+            a3 = symbol;
+        }
+        if (str[0] == 'b' && str[1] == '2') {
+           b2 = symbol;
+        }
+        if (str[0] == 'b' && str[1] == '3') {
+            b3 = symbol;
+        }
+        if (str[0] == 'c' && str[1] == '2') {
+           c2 = symbol;
+        }
+        if (str[0] == 'c' && str[1] == '3') {
+           c3 = symbol;
+        }
+
+        if (check_win(a1,a2,a3,b1,b2,b3,c1,c2,c3)) {
+            print_board(a1,a2,a3,b1,b2,b3,c1,c2,c3);
+            printf("%c WINS\n", symbol);
+            break;
+        }
+
+        if (symbol == '0') {
+            symbol = 'X';
+        } else {
+            symbol = '0';
+        }
+    }
+}
+
+```
+
+
+## [DAY-354] aircrack ng
+
+Watch youtube how to do deauthentication attacks using aircrack-ng and try it on any linux laptop
+
+