~cpp 
class Stack
{
	enum {Size=100};
private:
	int data[Size];
	int top;
	bool IsEmpty();
	bool IsFull();
public:
	Stack() { top=-1; }
	bool Push(int ndata);
	bool Pop();
	void Show();
	~Stack() {}
};

bool Stack::IsEmpty()
{
	if(top==-1)
		return true;
	return false;
}

bool Stack::IsFull()
{
	if(top==Size-1)
		return true;
	return false;
}

bool Stack::Push(int ndata)
{
	if(!IsFull())
	{
		data[++top]=ndata;
		return true;
	}
	else
	{
		cout<<"��� ������";
		return false;
	}
}

bool Stack::Pop()
{
	if(!IsEmpty())
	{
		top--;
		return true;
	}
	else
	{
		cout<<"��������";
		return false;
	}
}

void Show()
{
	int temp=top;
	while(temp!=-1)
		cout<<data[temp--];
}

~cpp 
class Stack
{
private:
	struct Node
	{
		int m_nData;
		Node* m_pPrev;
	};
	Node* Head;		// ���무����� ���는 ����� 노�� ����� ������(������ ������면 ������ ������!)
	Node* top;
	bool IsEmpty();
public:
	Stack();
	void Push(int x);
	void Pop();
	void Show();
	~Stack();
};

Stack::Stack()
{
	Head=new Node;
	Head->m_pPrev=NULL;
	top=Head;
}

void Stack::Push(int x)
{
	Node* temp=new Node;
	temp->m_nData=x;
	temp->m_pPrev=top;
	top=temp;
}

bool Stack::Pop()
{
	if(!IsEmpty())
	{
		Node* temp=top->m_pPrev;
		delete top;
		top=temp;
		return true;
	}
	else
         {
                  cout<<"��������";
		return false;
         }
}

void Stack::Show() 
{
	Node* temp=top;
	while(!IsEmpty())
	{
		cout<<top->m_nData<<endl;
		top=top->m_pPrev;
	}
	top=temp;
}

bool Stack::IsEmpty() 
{
	if(top==Head)
		return true;
	return false;
}

Stack::~Stack()
{
	while(!IsEmpty())
	{
		Pop();
	}
	delete Head;
}