这个问题我看下论坛也有很多的解答，可是我对比之后还是不明白我错哪里了~

求前辈们给指导啊~

先谢过了~

#include<stdio.h>
typedef struct stu
{
    int a;
    struct stu *next;
}STU;

void main()
{
    int n,i;
    STU *p,*head,*q;
    p=head=new STU;

    scanf("%d",&n);
    /*建立链表*/
    for(i=0;i<n;i++)
    {
        scanf("%d",&p->a);

        p->next=new STU;
        p=p->next;
   
    }
    /* 输出链表 */
    for (p = head; p != NULL; p = p->next)
        printf("%d", p->a);
    printf("\n");

    /* 逆置链表 */
    p = head;
    head = q = NULL;
    while (p != NULL)
    {
        if (head == NULL)
        {
            head = p;
            p = p->next;
            head->next = NULL;
        }
        else
        {
            q = p->next;
            p->next = head;
            head = p;
            p = q;
        }
    }
   
    /* 输出链表 */
    for (p = head; p != NULL; p = p->next)
        printf("%d", p->a);
    printf("\n");


        
        
   
   
   

   
}

开辟新空间给head然后p指向head吧- -

恩，先谢过了~

编译通过~成功！
解释好详细~谢谢啦~

以后我会多注意变量的意思的