//节点的结构
template<typename T>
struct node
{
    T data;
    node<T>* next;
    node():next(nullptr){};
    node(T t):data(t),next(nullptr){};
}
//模板类构造栈类
template<typename T>
Class MyStack
{
public:
    stack();
    void push(T &x);
    T top();
    void pop();
    int counts();
    bool empty();
    ~stack();
private:
    int count;
    node<T>* head;
}
template<typename T>
void MyStack<T>::push(T &x)
{
    node<T>* pnode= new node<T>(x);//申请空间
    pnode->next=head->next;
    head->next=pnode;
    count++;
}
template<typename T>
bool MyStack<T>::empty()
{
    return count==0;
}
template<typename T>
T MyStack<T>::top()
{
    if(!empty())
        return head->next->dada;
}
template<typename T>
void MyStack<T>::pop()
{
    if(!empty())
    {
        node<T>* del=head->next;
        head->next=haed->next->next;
        delete del;
        count--;
    }
}
template<typename T>
int MyStack<T>::counts()
{
    return count;
}