提交到oj显示运行错误，请问怎么改对它啊？

Question

void insert(struct node *H,int p)
{
struct node *pr=H;
struct node node;
node=(struct node)malloc(sizeof(struct node));
while(pr->next ->x<p)
{
pr=pr->next;
}
node->next =pr->next ;
node->x =p;
pr->next =node;

}

Answer 1

void insert(struct node *H,int p)
{
    struct node *pr=H->next,*pn=H;
    struct node *node;
    node=(struct node*)malloc(sizeof(struct node));
    while(pr!=NULL && pr->x<p) //添加链表结束条件
    {
        pn=pr;//保存前一个节点
        pr=pr->next;
    }
    node->next =pr;
    node->x =p;
    pn->next =node;
}