Add a Board type

src/main.rs

@@ -4,6 +4,9 @@ enum Square {
     Circle,
 }
 
+struct Board {
+    board: [Square; 9],
+}
 
 fn square_to_char(s: &Square) -> char {
     match s {
@@ -13,13 +16,13 @@ fn square_to_char(s: &Square) -> char {
     }
 }
 
-fn display(board: [Square; 9]) {
+fn display(board: Board) {
     for row in 0..3 {
         println!(
             " {} | {} | {}",
-            square_to_char(&board[row * 3]),
-            square_to_char(&board[row * 3 + 1]),
-            square_to_char(&board[row * 3 + 2])
+            square_to_char(&board.board[row * 3]),
+            square_to_char(&board.board[row * 3 + 1]),
+            square_to_char(&board.board[row * 3 + 2])
         );
         if row == 0 || row == 1 {
             println!("---+---+---");
@@ -28,7 +31,8 @@ fn display(board: [Square; 9]) {
 }
 
 fn main() {
-    let board = [
+    let board = Board {
+        board: [
             Square::Empty,
             Square::Cross,
             Square::Circle,
@@ -38,7 +42,8 @@ fn main() {
             Square::Empty,
             Square::Empty,
             Square::Empty,
-    ];
+        ],
+    };
 
     display(board);
 }