Node* p = new Node(); 与 new Node;

int main()
{
	Node* p = new Node();
	cout << p->data << endl;  // 0
	p->data = 9;
	cout << p->data << endl;  // 9

	Node* p2 = new Node;
	cout << p2->data << endl; // 不确定
	p2->data = 91;
	cout << p2->data << endl; // 91
	return 0;
}