typedef int Elemtype;
typedef struct StackNode
{
Elemtype data;
struct StackNode *next;
} StackNode,*LinkStack;
Status Pop(LinkStack *s,Elemtype *e)
{
LinkStack p;
if(*s==NULL) return 0;
*e=*s->data;
//p=s;
/* s=s->next;
free(p);*/
return 1;
}