Wrote program for Day 50

README.md

@@ -96,7 +96,7 @@ We encourage you to share your progress and ask questions in the Discussions sec
 | Day #47       | [Zip It](https://github.com/LiveGray/100-Days-Of-Rust/tree/main/Week-07/Day-47_Zip-It)                                | :white_check_mark:      |
 | Day #48       | [Christmas Tree](https://github.com/LiveGray/100-Days-Of-Rust/tree/main/Week-07/Day-48_Christmas-Tree)                        | :white_check_mark:      |
 | Day #49       | [Swimming Pool](https://github.com/LiveGray/100-Days-Of-Rust/tree/main/Week-07/Day-49_Swimming-Pool)                         | :white_check_mark:      |
-| Day #50       | [Tic Tac Toe](https://github.com/LiveGray/100-Days-Of-Rust/tree/main/Week-08/Day-50_Tic-Tac-Toe)                           | :white_large_square:      |
+| Day #50       | [Tic Tac Toe](https://github.com/LiveGray/100-Days-Of-Rust/tree/main/Week-08/Day-50_Tic-Tac-Toe)                           | :white_check_mark:      |
 | Day #51       | [Asteroid Collision](https://github.com/LiveGray/100-Days-Of-Rust/tree/main/Week-08/Day-51_Asteroid-Collision)                    | :white_large_square:      |
 | Day #52       | [Switch On The Gravity](https://github.com/LiveGray/100-Days-Of-Rust/tree/main/Week-08/Day-52_Switch-On-The-Gravity)                 | :white_large_square:      |
 | Day #53       | [Javelin Parabolic Throw](https://github.com/LiveGray/100-Days-Of-Rust/tree/main/Week-08/Day-53_Javelin-Parabolic-Throw)               | :white_large_square:      |

Week-08/Day-50_Tic-Tac-Toe/day50/Cargo.toml

@@ -0,0 +1,6 @@
+[package]
+name = "day50"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]

Week-08/Day-50_Tic-Tac-Toe/day50/src/lib.rs

@@ -0,0 +1,48 @@
+#[derive(Debug, PartialEq)]
+pub enum Player {
+    X,
+    O,
+}
+
+pub fn tic_tac_toe(board: &[[char; 3]; 3]) -> Option<Player> {
+    let winning_patterns = [
+        // Horizontal
+        [(0, 0), (0, 1), (0, 2)],
+        [(1, 0), (1, 1), (1, 2)],
+        [(2, 0), (2, 1), (2, 2)],
+        // Vertical
+        [(0, 0), (1, 0), (2, 0)],
+        [(0, 1), (1, 1), (2, 1)],
+        [(0, 2), (1, 2), (2, 2)],
+        // Diagonal
+        [(0, 0), (1, 1), (2, 2)],
+        [(0, 2), (1, 1), (2, 0)],
+    ];
+
+    let mut winner = None;
+
+    for pattern in &winning_patterns {
+        let mut x_count = 0;
+        let mut o_count = 0;
+        for (i, j) in pattern {
+            match board[*i][*j] {
+                'X' => x_count += 1,
+                'O' => o_count += 1,
+                _ => (),
+            }
+        }
+        if x_count == 3 {
+            if winner.is_some() {
+                return None;
+            }
+            winner = Some(Player::X);
+        } else if o_count == 3 {
+            if winner.is_some() {
+                return None;
+            }
+            winner = Some(Player::O);
+        }
+    }
+
+    winner
+}

Week-08/Day-50_Tic-Tac-Toe/day50/src/main.rs

@@ -0,0 +1,34 @@
+use day50::tic_tac_toe;
+
+fn read_board() -> Result<[[char; 3]; 3], Box<dyn std::error::Error>> {
+    let mut board = [['#'; 3]; 3];
+    for row in board.iter_mut() {
+        let mut line = String::new();
+        std::io::stdin().read_line(&mut line)?;
+        let cells: Vec<char> = line
+            .split_whitespace()
+            .map(|cell| cell.chars().next().unwrap())
+            .collect();
+        if cells.len() != 3 {
+            return Err("Invalid number of cells".into());
+        }
+        row.copy_from_slice(&cells);
+    }
+    Ok(board)
+}
+
+fn main() {
+    println!("Enter the tic tac toe board row by row using X, O, # (empty) separated by spaces");
+    let board = match read_board() {
+        Ok(board) => board,
+        Err(e) => {
+            eprintln!("Error reading board: {}", e);
+            return;
+        }
+    };
+    let winner = tic_tac_toe(&board);
+    match winner {
+        Some(winner) => println!("Winner: {:?}", winner),
+        None => println!("No winner"),
+    }
+}

Week-08/Day-50_Tic-Tac-Toe/day50/tests/examples.rs

@@ -0,0 +1,20 @@
+#[cfg(test)]
+mod examples {
+    use day50::{tic_tac_toe, Player};
+
+    #[test]
+    fn example1() {
+        let board = [['X', 'O', 'O'], ['O', 'X', 'O'], ['O', '#', 'X']];
+        assert_eq!(tic_tac_toe(&board), Some(Player::X));
+    }
+    #[test]
+    fn example2() {
+        let board = [['X', 'O', 'O'], ['O', 'X', 'O'], ['X', '#', 'O']];
+        assert_eq!(tic_tac_toe(&board), Some(Player::O));
+    }
+    #[test]
+    fn example3() {
+        let board = [['X', 'X', 'O'], ['O', 'X', 'O'], ['X', 'O', '#']];
+        assert_eq!(tic_tac_toe(&board), None);
+    }
+}