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Update chapTree.tex #30

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5 changes: 1 addition & 4 deletions C++/chapTree.tex
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Original file line number Diff line number Diff line change
Expand Up @@ -185,13 +185,12 @@ \subsubsection{Morris中序遍历}
public:
vector<int> inorderTraversal(TreeNode *root) {
vector<int> result;
TreeNode *cur, *prev;
TreeNode *cur;

cur = root;
while (cur != nullptr) {
if (cur->left == nullptr) {
result.push_back(cur->val);
prev = cur;
cur = cur->right;
} else {
/* 查找前驱 */
Expand All @@ -201,12 +200,10 @@ \subsubsection{Morris中序遍历}

if (node->right == nullptr) { /* 还没线索化，则建立线索 */
node->right = cur;
/* prev = cur; 不能有这句，cur还没有被访问 */
cur = cur->left;
} else { /* 已经线索化，则访问节点，并删除线索 */
result.push_back(cur->val);
node->right = nullptr;
prev = cur;
cur = cur->right;
}
}
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