Method preOrder

Trees/delete_nodes_BST.cpp:56–64

RECURSIVE DFS PREORDER

    
    //RECURSIVE DFS PREORDER
    void preOrder()     
    {
        if(this!=nullptr)
        {
            cout<<this->val<<",";
            this->left->preOrder();
            this->right->preOrder();
        }
    }
};

Tree* deleteNode(Tree *root, int val)