C语言实现有序链表合并

#define NULL 0
#include<stdio.h>
#include<malloc.h>

typedef struct LNode
{
    int data;
    struct LNode *next;
}LNode,*LinkList;

LinkList  CREATLIST()
{
    int data;
    LinkList head,s,r;
    head=(LinkList)malloc(sizeof(LNode));        /*生成头结点*/
    r=head;                                      /*尾指针初值指向头结点*/
    scanf("%d",&data);
    while(data!=0)                              /*0为输入结束符*/
    {
        s=(LinkList)malloc(sizeof(LNode));    /*生成新结点*/
        s->data=data;
        r->next=s;                            /*新结点插入表尾*/
        r=s;                                  /*尾指针r指向新的表尾*/
        scanf("%d",&data);                    /*读下一结点*/
    }
    r->next=NULL;
    return (head);
}
LinkList CONNECT(LinkList head1,LinkList head2)
{