帮我生成一段splay平衡树代码

当然可以，以下是一个简单的 Splay 平衡树实现代码（C++）：

#include <iostream>
using namespace std;

struct Node {
    int val;
    Node *left, *right, *p;
    Node(int v) : val(v), left(nullptr), right(nullptr), p(nullptr) {}
};

class SplayTree {
private:
    Node *root;

    void left_rotate(Node *x) {
        Node *y = x->right;
        x->right = y->left;
        if (y->left != nullptr) {
            y->left->p = x;
        }
        y->p = x->p;
        if (x->p == nullptr) {
            root = y;
        } else if (x == x->p->left) {
            x->p->left = y;
        } else {
            x->p->right = y;
        }
        y->left = x;
        x->p = y;
    }

    void right_rotate(Node *x) {
        Node *y = x->left;
        x->left = y->right;
        if (y->right != nullptr) {
            y->right->p = x;
        }
        y->p = x->p;
        if (x->p == nullptr) {
            root = y;
        } else if (x == x->p->left) {
            x->p->left = y;
        } else {
            x->p->right = y;
        }
        y->right = x;
        x->p = y;
    }

    void splay(Node *x) {
        while (x->p != nullptr) {
            if (x->p->p == nullptr) {
                if (x == x->p->left) {
                    right_rotate(x->p);
                } else {
                    left_rotate(x->p);
                }
            } else if (x == x->p->left && x->p == x->p->p->left) {
                right_rotate(x->p->p);
                right_rotate(x->p);
            } else if (x == x->p->right && x->p == x->p->p->right) {
                left_rotate(x->p->p);
                left_rotate(x->p);
            } else if (x == x->p->right && x->p == x->p->p->left) {
                left_rotate(x->p);
                right_rotate(x->p);
            } else {
                right_rotate(x->p);
                left_rotate(x->p);
            }
        }
    }

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

    Node* search(int v) {
        Node *x = root;
        while (x != nullptr && x->val != v) {
            if (v < x->val) {
                x = x->left;
            } else {
                x = x->right;
            }
        }
        if (x != nullptr) {
            splay(x);
        }
        return x;
    }

    void insert(int v) {
        Node *z = new Node(v);
        Node *y = nullptr;
        Node *x = root;
        while (x != nullptr) {
            y = x;
            if (z->val < x->val) {
                x = x->left;
            } else {
                x = x->right;
            }
        }
        z->p = y;
        if (y == nullptr) {
            root = z;
        } else if (z->val < y->val) {
            y->left = z;
        } else {
            y->right = z;
        }
        splay(z);
    }

    void remove(int v) {
        Node *z = search(v);
        if (z == nullptr) {
            return;
        }
        if (z->left == nullptr) {
            transplant(z, z->right);
        } else if (z->right == nullptr) {
            transplant(z, z->left);
        } else {
            Node *y = minimum(z->right);
            if (y->p != z) {
                transplant(y, y->right);
                y->right = z->right;
                y->right->p = y;
            }
            transplant(z, y);
            y->left = z->left;
            y->left->p = y;
        }
        delete z;
    }

    Node* minimum(Node *x) {
        while (x->left != nullptr) {
            x = x->left;
        }
        return x;
    }

    Node* maximum(Node *x) {
        while (x->right != nullptr) {
            x = x->right;
        }
        return x;
    }

    void inorder_walk() {
        inorder_walk(root);
        cout << endl;
    }

private:
    void transplant(Node *u, Node *v) {
        if (u->p == nullptr) {
            root = v;
        } else if (u == u->p->left) {
            u->p->left = v;
        } else {
            u->p->right = v;
        }
        if (v != nullptr) {
            v->p = u->p;
        }
    }

    void inorder_walk(Node *x) {
        if (x != nullptr) {
            inorder_walk(x->left);
            cout << x->val << ' ';
            inorder_walk(x->right);
        }
    }
};

int main() {
    SplayTree tree;
    tree.insert(5);
    tree.insert(2);
    tree.insert(8);
    tree.insert(1);
    tree.insert(3);
    tree.insert(7);
    tree.insert(9);
    tree.inorder_walk();  // output: 1 2 3 5 7 8 9
    tree.remove(5);
    tree.inorder_walk();  // output: 1 2 3 7 8 9
    tree.search(7);
    tree.inorder_walk();  // output: 1 2 3 7 8 9
    return 0;
}

以上代码实现了 Splay 平衡树的基本操作，包括插入、删除、查找、中序遍历等。如果你需要进一步了解 Splay 平衡树，可以参考相关资料。