c++红黑树实现代码怎么写

以下是一个简单的红黑树实现代码示例：

#include <iostream>

enum class Color { RED, BLACK };

template <typename T>
class Node {
public:
    T data;
    Color color;
    Node<T>* parent;
    Node<T>* left;
    Node<T>* right;

    Node(T data) : data(data), color(Color::RED), parent(nullptr), left(nullptr), right(nullptr) {}
};

template <typename T>
class RedBlackTree {
private:
    Node<T>* root;

    void rotateLeft(Node<T>* node) {
        Node<T>* temp = node->right;
        node->right = temp->left;

        if(temp->left != nullptr) {
            temp->left->parent = node;
        }

        temp->parent = node->parent;

        if(node->parent == nullptr) {
            root = temp;
        } else if(node == node->parent->left) {
            node->parent->left = temp;
        } else {
            node->parent->right = temp;
        }

        temp->left = node;
        node->parent = temp;
    }

    void rotateRight(Node<T>* node) {
        Node<T>* temp = node->left;
        node->left = temp->right;

        if(temp->right != nullptr) {
            temp->right->parent = node;
        }

        temp->parent = node->parent;

        if(node->parent == nullptr) {
            root = temp;
        } else if(node == node->parent->right) {
            node->parent->right = temp;
        } else {
            node->parent->left = temp;
        }

        temp->right = node;
        node->parent = temp;
    }

public:
    RedBlackTree() : root(nullptr) {}

    void insert(T data) {
        Node<T>* newNode = new Node<T>(data);
        Node<T>* parent = nullptr;
        Node<T>* current = root;

        while(current != nullptr) {
            parent = current;

            if(newNode->data < current->data) {
                current = current->left;
            } else {
                current = current->right;
            }
        }

        newNode->parent = parent;

        if(parent == nullptr) {
            root = newNode;
        } else if(newNode->data < parent->data) {
            parent->left = newNode;
        } else {
            parent->right = newNode;
        }

        // Fix the tree
        insertionFixup(newNode);
    }

    void insertionFixup(Node<T>* node) {
        while(node != root && node->parent->color == Color::RED) {
            if(node->parent == node->parent->parent->left) {
                Node<T>* uncle = node->parent->parent->right;

                if(uncle != nullptr && uncle->color == Color::RED) {
                    node->parent->color = Color::BLACK;
                    uncle->color = Color::BLACK;
                    node->parent->parent->color = Color::RED;
                    node = node->parent->parent;
                } else {
                    if(node == node->parent->right) {
                        node = node->parent;
                        rotateLeft(node);
                    }

                    node->parent->color = Color::BLACK;
                    node->parent->parent->color = Color::RED;
                    rotateRight(node->parent->parent);
                }
            } else {
                Node<T>* uncle = node->parent->parent->left;

                if(uncle != nullptr && uncle->color == Color::RED) {
                    node->parent->color = Color::BLACK;
                    uncle->color = Color::BLACK;
                    node->parent->parent->color = Color::RED;
                    node = node->parent->parent;
                } else {
                    if(node == node->parent->left) {
                        node = node->parent;
                        rotateRight(node);
                    }

                    node->parent->color = Color::BLACK;
                    node->parent->parent->color = Color::RED;
                    rotateLeft(node->parent->parent);
                }
            }
        }

        root->color = Color::BLACK;
    }
};

int main() {
    RedBlackTree<int> rbTree;
    rbTree.insert(10);
    rbTree.insert(20);
    rbTree.insert(30);

    return 0;
}

这段代码实现了一个简单的红黑树，并实现了插入节点以及插入后的修复操作。您可以根据需要进行扩展和修改。