【提问】下面的程序哪里有问题

#include<stdio.h>
#include<stdlib.h>
typedef char datatype;
typedef struct node
{datatype data;
struct node *next;
}linklist;
linklist *createlist()
{char ch;
linklist *head,*s,*r;
head=(linklist*)malloc(sizeof(linklist));
r=head;
printf("请输入字符产生链表，以#结束\n");
ch=getchar();
while(ch!='#')
{s=(linklist*)malloc(sizeof(linklist));
s->data=ch;
r->next=s;
r=s;
ch=getchar();
}
r->next=NULL;
return head;
}
linklist *get(linklist *head,int i)
{int j;
linklist *p;
p=head;j=0;
while((p->next!=NULL)&&(j<i))
{p=p->next;
j++;
}
if(i==j)return p;
else return NULL;
}
void main()
{
linklist *head,*r;
int num;
head=createlist();
printf("链表信息为:");
r=head->next;
while(r)
{
printf("%c",r->data);
r=r->next;
}
printf("\n");
printf("请输入要查询的序号:\n");
scanf("%d",&num);
r=get(head,num);
if(r==NULL)printf(",没有查到\n");
printf("查找的结果为:%c\n",r->data);
}