练习C语言100道单链表的连接时出现842150451

联系代码如下,尝试过直接第一个链表的尾指针直接指向第二个链表的首地址，发现程序出现错误
#include<stdio.h>
#include<malloc.h>
typedef struct number
{
int date;
struct number* next;
}element1;
#define len sizeof(element1)
#define creat_ele1 (element1 )malloc(len)
void connet(element1 p1, element1* p2);
int main()
{
element1* head, * tail, * p;
element1* head1 ,* tail1, * p1;
element1* printf_;//用来输出链表数据
int i, j, k;
printf("输入两个单链表大小");
scanf_s("%d %d", &j, &k);
head = (element1*)malloc(len);
p = head;
while (j)
{
scanf_s("%d", &p->date);
tail = creat_ele1;
p->next = tail;
p = tail;
j--;
}
p = p->next = NULL;
head1 = creat_ele1;
p1 = head1;
while (k)
{
scanf_s("%d", &p1->date);
tail1 = creat_ele1;
p1->next = tail1;
p1 = tail1;
k--;
}
printf_ = head;
p1 = p1->next = NULL;
while (printf_->next!= NULL)
{
printf("%d", printf_->date);
printf_ = printf_->next;
}
printf("\n");
printf_ = head1;
while (printf_->next != NULL)
{
printf("%d", printf_->date);
printf_ = printf_->next;
}
printf("链接后的数据");
connet(head, head1);
printf_ = head;
while(printf_->next)
{
printf("%d", printf_->date);
printf_ = printf_->next;
}
return 0;
}
void connet(element1 * p1,element1 *p2)//链接两个链表
{
while (p1->next)
p1 = p1->next;
p1->next = p2;
}
输入2 2
1 2
1 2
得到结果12 842150451 12

#include<stdio.h>
#include<malloc.h>
typedef struct number
{
    int date;
    struct number* next;
}element1;

#define len sizeof(element1)
#define creat_ele1 (element1 *)malloc(len)

void connet(element1 *p1, element1* p2);

int main()
{
    element1* head, * tail, * p;
    element1* head1, * tail1, * p1;
    element1* printf_;//用来输出链表数据
    int i, j, k;
    printf("输入两个单链表大小");
    scanf_s("%d %d", &j, &k);
    head = (element1*)malloc(len);
    p = head;
    while (true)
    {
        scanf_s("%d", &p->date);
        if (j <= 1) break;
        tail = creat_ele1;
        p->next = tail;
        p = tail;
        j--;
    }
    p = p->next = NULL;
    head1 = creat_ele1;
    p1 = head1;
    while (true)
    {
        scanf_s("%d", &p1->date);
        if (k <= 1) break;
        tail1 = creat_ele1;
        p1->next = tail1;
        p1 = tail1;
        k--;
    }
    printf_ = head;
    p1 = p1->next = NULL;
    while (printf_ != NULL)
    {
        printf("%d", printf_->date);
        printf_ = printf_->next;
    }
    printf("\n");
    printf_ = head1;
    while (printf_ != NULL)
    {
        printf("%d", printf_->date);
        printf_ = printf_->next;
    }
    printf("\n");
    printf("链接后的数据");
    connet(head, head1);
    printf_ = head;
    while (printf_ != NULL)
    {
        printf("%d", printf_->date);
        printf_ = printf_->next;
    }
    return 0;
}
void connet(element1* p1, element1* p2)//链接两个链表
{
    while (p1->next)
        p1 = p1->next;
    p1->next = p2;
}