Insert a node in a BST

Node* create_node(int x)
{
   struct Node*root= (struct Node*)malloc(sizeof(struct Node*));
    root->left=NULL;
    root->right=NULL;
    root->data=x;
    return root;
}
  
  
  

  
  
Node* insert(Node* node, int data)
{
   if(node==NULL)
     return create_node(data);
     
    if(node->data==data)
      return node;
     
    if(node->data>data)
      {
          node->left=insert(node->left,data);
      }
      else if(node->data<data)
        node->right=insert(node->right,data);
      
        
      
    
    return node;
    
    
    
}