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 <iostream>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;}