程序代码：

ist *merger(list *p1, list *p2)
{
    list *head, *p;
    while (p1 != NULL || p2 != NULL)
    {
        int i{ 1 };


        if (p1->num > p2->num)
        {
            if (i == 1)
            {
                p = head = p2; p2 = p2->next;
            }
            else
            {
                p->next = p2; p = p2; p2 = p2->next;
            }
        }
        else
        {
            if (i == 1)
            {
                p = head = p1; p1 = p1->next;
            }
            else
            {
                p->next = p1; p = p1; p1 = p1->next;
            }
        }
        if (p1 = NULL)
        {
            p->next= p2;
        }
        if (p2 = NULL)
        {
            p->next= p1;
        }
        i++;
    }
    return head;
}

程序代码：

list *creat(int n)
{
    list *p1, *p2,*head;
    int i{1};
    while (i <= 5)
    {
        p1 = (list *)malloc(len);
        if (i == 1)
        {
            head = p1; p1->num = n;
        }
        else
        {
            p2->next = p1; p1->num = p2->num + 2;
        }
        p2 = p1;
        i++;
    }
    p2->next = NULL;
    return head;

}