C语言读取文件到链表的疑问

[a825926]

void file_to_struct_admin()
{
	FILE *fp;
    p1_admin=head_admin->next;
	fp = fopen("login_users.txt", "r");
	while (!feof(fp))
	{	
		p1_admin = (struct ADMIN_USERS*)malloc(ADMIN_LEN);
		fscanf(fp, "%s %s %d\n",p1_admin->id, p1_admin->pwd, &p1_admin->auth);
		p1_admin = p1_admin->next;
	}
	p1_admin = NULL;
	fclose(fp);
}

这一段代码跑起来总是有问题，有大神可以帮忙看一下么？谢谢！

[宁南学者]

显然有问题，这是建立链表吧，应该插入才对， p=head ; q=new struct... ; p->next=q; p=q; 然后依次循环...

[自信男孩]

void file_to_struct_admin()
{
    FILE *fp;
    struct ADMIN_USERS *prev, *pcur;

    prev = head_admin;
    fp = fopen("login_users.txt", "r");
    if (!fp)
        return;
    while (!feof(fp))
    {
        pcur = (struct ADMIN_USERS*)malloc(ADMIN_LEN);
        if (!pcur)
            exit(0);
        ret = fscanf(fp, "%s %s %d\n",pcur_admin->id, pcur_admin->pwd, &pcur_admin->auth);
        if (ret < 3)
            break;
        prev->next = pcur;
        prev = pcur;
    }
    pcur->next = NULL;
    fclose(fp);
}

参考一下吧 楼主的有问题

[NIL_]

链表的插入出了问题,你应该修改