修改接口返回值，完善文档注释

src/PlayerInterface/IEntity.cs

@@ -160,21 +160,21 @@ public interface IEntity
         /// 获取指定角色位置
         /// </summary>
         /// <param name="PlayerIndex">指定玩家序号 范围1-4</param>
-        /// <returns>以[0]为行、[1]为列的一位数组座标</returns>
-        int?[] PlayerPosition(int PlayerIndex);
+        /// <returns>以[0]为行、[1]为列的一位数组座标，若未找到，返回null</returns>
+        int[] PlayerPosition(int PlayerIndex);
 
         /// <summary>
         /// 获取指定角色血量
         /// </summary>
         /// <param name="PlayerIndex">指定玩家序号 范围1-4</param>
-        /// <returns>指定角色血量</returns>
+        /// <returns>指定角色血量，若未找到，返回null</returns>
         int? PlayerHealth(int PlayerIndex);
 
         /// <summary>
         /// 获取指定玩家分数
         /// </summary>
         /// <param name="PlayerIndex">指定玩家序号 范围1-4</param>
-        /// <returns></returns>
+        /// <returns>指定角色分数，若未找到，返回null</returns>
         int? PlayerScore(int PlayerIndex);
 
 

src/Project/Assets/Scrpit/Turing/TuringOperate.cs

@@ -167,13 +167,13 @@ public bool CanBomb()
         return GetComponent<PlayerBomb>().CanBomb();
     }
 
-    public int?[] PlayerPosition(int PlayerIndex)
+    public int[] PlayerPosition(int PlayerIndex)
     {
         foreach(GameObject player in players)
         {
             if (PlayerIndex == player.GetComponent<PlayerScoreManager>().playerID)
             {
-                int?[] position = { (int)(player.transform.position.x + 0.5), (int)(player.transform.position.z + 0.5) }; //四舍五入处理
+                int[] position = { (int)(player.transform.position.x + 0.5), (int)(player.transform.position.z + 0.5) }; //四舍五入处理
                 return position;
             }
         }