NULL to nullptr

2 years ago · 3fc3475af4
parent cce8201e2b
commit 3fc3475af4
2 changed files with 4 additions and 4 deletions
--- a/codes/cpp/chapter_tree/binary_tree_bfs.cpp
+++ b/codes/cpp/chapter_tree/binary_tree_bfs.cpp
@ -17,9 +17,9 @@ vector<int> hierOrder(TreeNode* root) {
        TreeNode* node = queue.front();
        queue.pop();  // 队列出队
        vec.push_back(node->val);            // 保存结点
-        if (node->left != NULL)
+        if (node->left != nullptr)
            queue.push(node->left);    // 左子结点入队
-        if (node->right != NULL)
+        if (node->right != nullptr)
            queue.push(node->right);   // 右子结点入队
    }
    return vec;
--- a/docs/chapter_tree/binary_tree.md
+++ b/docs/chapter_tree/binary_tree.md
@ -238,9 +238,9 @@ comments: true
            TreeNode* node = queue.front();
            queue.pop();  // 队列出队
            vec.push_back(node->val);            // 保存结点
-            if (node->left != NULL)
+            if (node->left != nullptr)
                queue.push(node->left);    // 左子结点入队
-            if (node->right != NULL)
+            if (node->right != nullptr)
                queue.push(node->right);   // 右子结点入队
        }
        return vec;