#include <iostream>
using namespace std;
const int Max=100;
 
template <class T>
class SeqStack
{
	public:
		SeqStack(){top=-1;}
		~SeqStack(){}
		void Push(T data);
		void Pop();
	private:
		T data[Max];
		int top;
 
};
 
 
template <class T>
void SeqStack<T>::Push(T x)
{
	if(top==Max-1)throw"上溢";
	data[++top]=x;
	cout<<x<<endl;
}
 
 
template <class T>
void SeqStack<T>::Pop()
{
	int x;
	if(top==-1)throw"下溢";
	x=data[top--];
	cout<<x<<endl;
}
 
 
 
 
 
 
 
int main()
{
	SeqStack<int> one;
 
	one.Push(123);
	one.Push(124);
	one.Pop(); 
	one.Pop();
	return 0;
}