C语言合并一个降序和升序数列

我的输出特别奇怪，麻烦大家帮我看看
题目：已知链表 LA 按值非递增有序排列,LB 按值非递减有序排列,现要求将 LA和 LB 归并为一个新的链表 LC,且 LC 中的数据元素按值非递减有序排列

#include <stdio.h>
#include <stdlib.h>
typedef struct node
{
    int date;
    struct node* next;
}node,*list;
list create();
void nizhi(list A);
void combine(list A,list B);
int main()
{
    list A=create();
    list B=create();
    void nizhi(A);
    combine(A,B);
    return 0;
}
list create()
{
    int x;
    scanf("%d",&x);
    list head=(list)malloc(sizeof(node));
    head->next=NULL;
    head->date=0;
    list q=head;
    do{
        list p=(list)malloc(sizeof(node));
        p->date=x;
        q->next=p;
        p->next=NULL;
        q=p;
    }while(getchar()!='\n');
    return head;
}
void nizhi(list A)
{
    list p=A->next;
    A->next=NULL;
    while(p){
        list r=p->next;
        p->next=A->next;
        A->next=p;
        p=r;
    }
}
void combine(list A,list B)
{
    list C=(list)malloc(sizeof(node));
    C->date=0;
    C->next=NULL;
    list t=C;
    list p=A->next;
    list q=B->next;
    while(p&&q){
        list s=(list)malloc(sizeof(node));
        if(p->date<q->date){
            s->date=p->date;
            t->next=s;
            t=s;
            p=p->next;
        }
        else if(p->date>q->date){
            s->date=q->date;
            t->next=s;
            t=s;
            q=q->next;
        }
    }
    if(p){
            t->next=p;
        }
        else if(q){
            t->next=q;
        }
    list f=C->next; 
    while(f){
        printf("%d ",f->date);
        f=f->next;
    }
}

修改处见注释，供参考。另：将 LA和 LB 归并为一个新的链表 LC，是否需要申请新的空间，值得商榷，代码里是生成一部分，后面又截取部分原来的。

#include <stdio.h>
#include <stdlib.h>
typedef struct node
{
    int date;
    struct node* next;
}node, * list;
list create();
void nizhi(list A);
void combine(list A, list B);
int main()
{
    list A = create();
    list B = create();
    nizhi(A);    //void nizhi(A); 函数调用  修改
    combine(A, B);
    return 0;
}
list create()
{
    int x;
          //scanf("%d", &x);  修改
    list head = (list)malloc(sizeof(node));
    head->next = NULL;
    head->date = 0;
    list q = head;
    do {
        scanf("%d", &x); //输入 x 应放在 do{}while;循环体里 修改
        list p = (list)malloc(sizeof(node));
        p->date = x;
        q->next = p;
        p->next = NULL;
        q = p;
    } while ((getchar()) != '\n');
    return head;
}
void nizhi(list A)
{
    list p = A->next;
    A->next = NULL;
    while (p) {
        list r = p->next;
        p->next = A->next;
        A->next = p;
        p = r;
    }
}
void combine(list A, list B)
{
    list C = (list)malloc(sizeof(node));
    C->date = 0;
    C->next = NULL;
    list t = C;
    list p = A->next;
    list q = B->next;
    while (p && q) {
        list s = (list)malloc(sizeof(node));
        s->next = NULL;      //修改
        if (p->date < q->date) {
            s->date = p->date;
            t->next = s;
            t = s;
            p = p->next;
        }
        else {       //if (p->date > q->date) { 修改
            s->date = q->date;
            t->next = s;
            t = s;
            q = q->next;
        }
    }
    if (p) {
        t->next = p;
    }
    if (q) {  //else if (q) 修改
        t->next = q;
    }
    list f = C->next;
    while (f) {
        printf("%d ", f->date);
        f = f->next;
    }
}