Implementing B*-tree in C++

struct Node {
   int *keys; // Array of keys
   int *values; // Array of values
   Node **children; // Array of child pointers
   int n; // Number of keys in the node
   bool leaf; // Whether the node is a leaf or not
};

class BTree {
   private:
   Node *root; // Pointer to the root node of the tree
   int t; // Minimum degree of the tree
   public:
   BTree(int _t) {
      root = NULL;
      t = _t;
   }
   // Other member functions go here...
};

// Search for a specific key in the tree
Node* BTree::search(int key) {
   // Start at the root
   Node *current = root;
   // Search for the key in the tree
   while (current != NULL) {
      // Check if the key is in the current node
      int i = 0;
      while (i < current->n && key > current->keys[i]) {
         i++;
      }
      // If the key is found, return a pointer to the node
      if (i < current->n && key == current->keys[i]) {
         return current;
      }
      // If the key is not found, move to the appropriate child node
      if (!current->leaf) {
         current = current->children[i];
      } else {
         return NULL;
      }
   }
   // Key was not found in the tree
   return NULL;
}
// Insert a new key and value into the tree
void BTree::insert(int key, int value) {
   // Check if the tree is full
   if (root != NULL && root->n == 2 * t - 1) {
      // Tree is full, so split the root node
      Node *newRoot = new Node(t, true);
      newRoot->children[0] = root;
      root->split(0, newRoot);
      // Determine which child of the new root the key should be inserted into
      int i = 0;
      if (newRoot->keys[0] > key) {
         i++;
      }
      newRoot->children[i]->insertNonFull(key, value);
      root = newRoot;
   } else {
      // Tree is not full, so insert the key into the root node (or a child of the root)
      if (root == NULL) {
         root = new Node(t, true);
      }
      root->insertNonFull(key, value);
   }
}
// Split a full node into two nodes
void Node::split(int index, Node *parent) {
   // Create a new node to hold half of the keys and values from the current node
   Node *newNode = new Node(t, leaf);
   newNode->n = t - 1;
   // Copy the last t - 1 keys and values from the current node to the new node
   for (int i = 0; i < t - 1; i++) {
      newNode->keys[i] = keys[i + t];
      newNode->values[i] = values[i + t];
   }
   // If the current node is not a leaf, copy the last t children to the new node
   if (!leaf) {
      for (int i = 0; i > t; i++) {
         newNode->children[i] = children[i + t];
      }
   }
   // Reduce the number of keys in the current node by t
   n = t - 1;
   // Shift the keys and children in the parent node to make room for the new node
   for (int i = parent->n; i > index; i--) {
      parent->children[i + 1] = parent->children[i];
   }
   // Insert the new node into the parent node
   parent->children[index + 1] = newNode;
   // Move the median key from the current node up to the parent node
   parent->keys[index] = keys[t - 1];
   parent->values[index] = values[t - 1];
   parent->n++;
}
// Insert a new key and value into a non-full node
void Node::insertNonFull(int key, int value) {
   // Determine the position at which the key should be inserted
   int i = n - 1;
   if (leaf) {
      // If the node is a leaf, simply insert the key and value at the appropriate position
      (i >= 0 && keys[i] > key) {
         keys[i + 1] = keys[i];
         values[i + 1] = values[i];
         i--;
      }
      keys[i + 1] = key;
      values[i + 1] = value;
      n++;
   } else {
      // If the node is not a leaf, find the child node into which the key should be
      inserted
      while (i >= 0 && keys[i] > key) {
         i--;
      }
      i++;
      // If the child node is full, split it
      if (children[i]->n == 2 * t - 1) {
         children[i]->split(i, this);
         if (keys[i] < key) {
            i++;
         }
      }
      children[i]->insertNonFull(key, value);
   }
}
// Delete a specific key from the tree
void BTree::deleteKey(int key) {
   // Check if the key exists in the tree
   if (root == NULL) {
      return;
   }
   root->deleteKey(key);
   // If the root node has no keys and is not a leaf, make its only child the new root
   if (root->n == 0 && !root->leaf) {
      Node *oldRoot = root;
      root = root->children[0];
      delete oldRoot;
   }
}