#ifndef _STACK_H
#define _STACK_H

struct Node;
typedef struct Node *PtrToNode;
typedef PtrToNode Stack;
typedef int ElmentType;

struct Node
{
	ElmentType Elment;
	PtrToNode Next;
};

void MakeEmpty(Stack S);
Stack CreateStack(void);
void Push(ElmentType X,Stack S);
void Pop(Stack S);
ElmentType Top(Stack S);
int IsEmpty(Stack S);

#endif