#include<iostream>
using namespace std;
typedef struct student
{
	int data;
	struct student * next;
}node;

typedef struct stackqueque
{
	node * top, *zhandi;
} Stack;

Stack * push(Stack * stack,int num)
{
	node *s = (node *)malloc(sizeof(node));
	s->data = num;
	s->next = NULL;
	if (stack->top==NULL)
	{
		stack->top = s;
		stack->zhandi = s;
	}
	else
	{
		stack->top->next = s;
		stack->top = s;
	}
	return stack;
}
int  pop(Stack *stack)
{
	if (stack->top==NULL)
	{
		cout << "棧為空" << endl;
		return -1;
	}
	if (stack->top==stack->zhandi)
	{
		int x = stack->top->data;
		stack->top = NULL;
		stack->zhandi = NULL;
		return x;
	}
	else
	{
		
		node*	p = stack->zhandi;
		while (p->next!=stack->top)
		{
			p = p->next;
		}
		node *q = stack->top;
		int x = stack->top->data;
		p->next = NULL;
		stack->top = p;
		free(q);
		return x;

	}
	
}
int main()
{

}