请大家帮我看看这个简单操作

#include <stdio.h>
#include <malloc.h>
#include <stdlib.h>
typedef struct LNode
{
    int num;
    int passwd;
    struct LNode *next;
    struct LNode *prior;
}LNode;
void Creat(LNode *L,int n)
{
    LNode *p,*q;
    int i = 0;
    L = p = q = NULL;
    for(i = 1;i <= n;i++)
    {
        p = (LNode *)malloc(sizeof(LNode));
        scanf("%d",&p->passwd);
        p->num = i;
        if(L == NULL)
        {
            L = q = p;
        }
        else
        {
            q->next = p;
            p->prior = q;
            q = p;
        }
    }
    p->next = L;
    L->prior = p;
}
void Print(LNode *L)
{
    LNode *p;
    p = L;
    printf("%d ",p->passwd);
    p = p->next;
    while(p != L)
    {
        printf("%d ",p->passwd);
        p = p->next;
    }
}
void main()
{
    LNode L;
    int n , m ;
    scanf("%d%d",&m,&n);
    Creat(&L,n);
    Print(&L);
}
我在主函数中将节点地址传入，为什么不能成功创建 我调试的时候发现打印的p->passwd是乱码