From f5a7f0ce22cd914b161d9cdf40f8cd356c5da5bd Mon Sep 17 00:00:00 2001
From: CalciteM <calcitem@outlook.com>
Date: Sun, 30 Jun 2019 16:13:13 +0800
Subject: [PATCH] =?UTF-8?q?=E8=AE=A9=20rootNode=20=E4=B9=9F=E9=80=9A?=
 =?UTF-8?q?=E8=BF=87=20addNode()=20=E6=9E=84=E5=BB=BA?=
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---
 NineChess/src/ninechessai_ab.cpp | 12 ++++++------
 NineChess/src/ninechessai_ab.h   |  2 +-
 2 files changed, 7 insertions(+), 7 deletions(-)

diff --git a/NineChess/src/ninechessai_ab.cpp b/NineChess/src/ninechessai_ab.cpp
index 2ae0176d..c21abc7b 100644
--- a/NineChess/src/ninechessai_ab.cpp
+++ b/NineChess/src/ninechessai_ab.cpp
@@ -26,13 +26,10 @@ NineChessAi_ab::~NineChessAi_ab()
 
 void NineChessAi_ab::buildRoot()
 {
-    rootNode = new Node;
-    rootNode->value = 0;
-    rootNode->move = 0;
-    rootNode->parent = nullptr;
+    rootNode = addNode(nullptr, 0, 0);
 }
 
-void NineChessAi_ab::addNode(Node *parent, int value, int move)
+struct NineChessAi_ab::Node *NineChessAi_ab::addNode(Node *parent, int value, int move)
 {
     Node *newNode = new Node;
     newNode->parent = parent;
@@ -70,7 +67,10 @@ void NineChessAi_ab::addNode(Node *parent, int value, int move)
     newNode->cmd = cmd;
 #endif
 
-    parent->children.push_back(newNode);
+    if (parent)
+        parent->children.push_back(newNode);
+
+    return newNode;
 }
 
 // 静态hashmap初始化
diff --git a/NineChess/src/ninechessai_ab.h b/NineChess/src/ninechessai_ab.h
index 2a770834..2c21b4d0 100644
--- a/NineChess/src/ninechessai_ab.h
+++ b/NineChess/src/ninechessai_ab.h
@@ -93,7 +93,7 @@ protected:
     void buildRoot();
 
     // 增加新节点
-    void addNode(Node* parent, int value, NineChess::move_t move);
+    struct Node *addNode(Node *parent, int value, NineChess::move_t move);
 
     // 评价函数
     int evaluate(Node *node);