c++红黑树算法怎么实现

红黑树是一种自平衡的二叉查找树，可以在O(log n)的时间复杂度内进行插入、删除和查找操作。以下是一个简单的C++实现红黑树的算法：

#include  using namespace std;  enum Color { RED, BLACK };  struct Node {     int data;     Color color;     Node *left, *right, *parent;      Node(int data) : data(data) {         parent = left = right = NULL;         color = RED;     } };  class RedBlackTree { private:     Node *root;      void rotateLeft(Node *x) {         Node *y = x->right;         x->right = y->left;         if (y->left != NULL) {             y->left->parent = x;         }         y->parent = x->parent;         if (x->parent == NULL) {             root = y;         } else if (x == x->parent->left) {             x->parent->left = y;         } else {             x->parent->right = y;         }         y->left = x;         x->parent = y;     }      void rotateRight(Node *x) {         Node *y = x->left;         x->left = y->right;         if (y->right != NULL) {             y->right->parent = x;         }         y->parent = x->parent;         if (x->parent == NULL) {             root = y;         } else if (x == x->parent->left) {             x->parent->left = y;         } else {             x->parent->right = y;         }         y->right = x;         x->parent = y;     }      void fixViolation(Node *x) {         Node *parent = NULL;         Node *grandparent = NULL;          while (x != root && x->color == RED && x->parent->color == RED) {             parent = x->parent;             grandparent = x->parent->parent;              if (parent == grandparent->left) {                 Node *uncle = grandparent->right;                 if (uncle != NULL && uncle->color == RED) {                     grandparent->color = RED;                     parent->color = BLACK;                     uncle->color = BLACK;                     x = grandparent;                 } else {                     if (x == parent->right) {                         rotateLeft(parent);                         x = parent;                         parent = x->parent;                     }                     rotateRight(grandparent);                     swap(parent->color, grandparent->color);                     x = parent;                 }             } else {                 Node *uncle = grandparent->left;                 if (uncle != NULL && uncle->color == RED) {                     grandparent->color = RED;                     parent->color = BLACK;                     uncle->color = BLACK;                     x = grandparent;                 } else {                     if (x == parent->left) {                         rotateRight(parent);                         x = parent;                         parent = x->parent;                     }                     rotateLeft(grandparent);                     swap(parent->color, grandparent->color);                     x = parent;                 }             }         }         root->color = BLACK;     }      void insertHelper(Node *node) {         Node *cur = root;         Node *parent = NULL;          while (cur != NULL) {             parent = cur;             if (node->data < cur->data) {                 cur = cur->left;             } else {                 cur = cur->right;             }         }          node->parent = parent;         if (parent == NULL) {             root = node;         } else if (node->data < parent->data) {             parent->left = node;         } else {             parent->right = node;         }          fixViolation(node);     }      void inorderHelper(Node *node) {         if (node == NULL) {             return;         }          inorderHelper(node->left);         cout << node->data << " ";         inorderHelper(node->right);     }  public:     RedBlackTree() : root(NULL) {}      void insert(int data) {         Node *node = new Node(data);         insertHelper(node);     }      void inorder() {         inorderHelper(root);     } };  int main() {     RedBlackTree tree;      tree.insert(7);     tree.insert(3);     tree.insert(18);     tree.insert(10);     tree.insert(22);     tree.insert(8);     tree.insert(11);     tree.insert(26);      cout << "Inorder traversal of the constructed Red-Black tree is: ";     tree.inorder();      return 0; }