Write initializeBoard function

src/main/c/VierGewinnt.c

@@ -96,4 +96,11 @@ int main_function() {
 
     return 0;
 }
-
+// Write initializeBoard function
+void initializeBoard(char board[ROWS][COLS]) {
+    for (int i = 0; i < ROWS; i++) {
+        for (int j = 0; j < COLS; j++) {
+            board[i][j] = ' ';
+        }
+    }
+}