利用栈来实现单链表的逆序

#include <stdio.h>
# include<stdlib.h>
#define stacksize 100
typedef int datatype;
typedef struct
{
   datatype data[stacksize];
        int  top;
}seqstack;
typedef struct node{
   datatype  data;
   struct node *next;
}listnode;
typedef listnode *linklist;
linklist head;
linklist p;
int count;
linklist creatlist(int n)
{
  linklist head;
  listnode *p1,*p2;
  int i;
  head=(linklist)malloc(sizeof(listnode));
  head->next=NULL;
  p2=head;
  printf("Please input the records of the chain!n");
  for(i=0;i<n;i++)
  {
     p1=(linklist)malloc(sizeof(listnode));
     scanf("%d",&p1->data);
     p1->next=p2->next;
     p2->next=p1;
     p2=p1;
  }
   return (head);
}
void print(linklist head,int n)
{
  if(head==NULL)
           printf("list null!n");
  printf("Now these %d records are:n",n);
  p=head->next;
  printf("%4d",p->data);
  count=1;
  while(p->next!=NULL)
  {
      count++;
      p=p->next;
      printf("%4d",p->data);
      if(!(count%10))
             printf("n");
  }
}
datatype push(seqstack *s,int x)  
 {
  if(s->top==stacksize-1)
       printf("The stack is overflow!n");
   else
             s->data[++s->top]=x;  
 }
datatype pop(seqstack *s) 
 {
   if(s->top==-1)
    printf("the stack is empty!n");
   else
           return (s->data[s->top--]);
 }