为什么退出程序后文件中的信息无法导入链表！求助！！,C\C++交流,技术交流,鱼C论坛

费曼发表于 2018-12-29 18:47:27

为什么退出程序后文件中的信息无法导入链表！求助！！

比如进行注册后退出，然后再打开程序登陆，但登不了
#include<stdio.h>
#include<stdlib.h>
#include<string.h>

struct Date
{
   int year;
   int month;
   int day;
};
struct Book
{
   char title;
   char author;
   float price;
   struct Date date;
   char publisher;
   struct Book*pnext;
};

struct USER
{
unsigned int id;
unsigned int password;
struct USER *pnext;
};

void read_bookfile(struct Book**pphead)
{
FILE*fp;
if((fp=fopen("图书信息.txt","r"))==NULL)
{
if((fp=fopen("图书信息.txt","w"))==NULL)
{
printf("打开文件失败！\n");
exit(EXIT_FAILURE);
}
fclose(fp);
if((fp=fopen("图书信息.txt","r"))==NULL)
{
printf("打开文件失败！\n");
exit(EXIT_FAILURE);
}
}
while(fgetc(fp)!=EOF)
{ struct Book *book=(struct Book*)malloc(sizeof(struct Book));
fscanf(fp,"书名：%s\n",book->title);
fscanf(fp,"作者：%s\n",book->author);
fscanf(fp,"售价：%f\n",&book->price);
fscanf(fp,"出版日期:%d-%d-%d\n",&book->date.year,&book->date.month,&book->date.day);
fscanf(fp,"出版社:%s\n\n",book->publisher);
book->pnext=*pphead;
*pphead=book;
}
fclose(fp);
}

void write_bookfile(struct Book*book)
{
FILE*fp;
if((fp=fopen("图书信息.txt","w"))==NULL)
{
printf("打开文件失败！\n");
exit(EXIT_FAILURE);
}
while(book!=NULL)
{
fprintf(fp,"书名：%s\n",book->title);
fprintf(fp,"作者：%s\n",book->author);
fprintf(fp,"售价：%.2f\n",book->price);
fprintf(fp,"出版日期:%d-%d-%d\n",book->date.year,book->date.month,book->date.day);
fprintf(fp,"出版社:%s\n\n",book->publisher);
book=book->pnext;
}
fclose(fp);

}

void read_userfile(struct USER**pphead)
{
FILE*fp;
int count=1;
if((fp=fopen("用户信息.txt","r"))==NULL)
{
if((fp=fopen("用户信息.txt","w"))==NULL)
{
printf("打开文件失败！\n");
exit(EXIT_FAILURE);
}
fclose(fp);
if((fp=fopen("用户信息.txt","r"))==NULL)
{
printf("文件打开失败！\n");
exit(EXIT_FAILURE);
}
}
while(fgetc(fp)!=EOF)
{
struct USER *user=(struct USER*)malloc(sizeof(struct USER));
fscanf(fp,"--第%d位用户信息--\n 账号：%u",&count,&user->id);
fscanf(fp,"密码：%u\n",&user->password);
user->pnext=*pphead;
*pphead=user;
}
fclose(fp);
}

void write_userfile(struct USER*user)
{
FILE*fp;
if((fp=fopen("用户信息.txt","w"))==NULL)
{
printf("打开文件失败！\n");
exit(EXIT_FAILURE);
}
while(user!=NULL)
{
int count=1;
fprintf(fp,"--第%d位用户信息--\n 账号：%u ",count,user->id);
fprintf(fp,"密码：%u\n",user->password);
user=user->pnext;
count++;
}
fclose(fp);

}

void print_log(void)
{
printf("\n\n----------------欢迎来到图书管理系统----------------------\n\n\n");
printf(" 1 登录\n");
printf(" 2 注册\n");
printf(" 3 退出\n\n\n");
printf(" ---请输入操作前的序号进行相应操作---\n\n");
}

void AddUser(struct USER**pphead)
{
struct USER*newuser=(struct USER*)malloc(sizeof(struct USER));
if(newuser==NULL)
{
printf("分配内存失败！\n");
exit(EXIT_FAILURE);
}
printf("--注册新账户--\n");
printf("账户：");
scanf("%u",&newuser->id);
printf("密码：");
scanf("%u",&newuser->password);
newuser->pnext=*pphead;
*pphead=newuser;
putchar('\n');
}

void log_on(unsigned int*id,unsigned int*password)
{
printf("——请输入账号和密码(未注册请先注册账户)——\n");
printf("账号：");
scanf("%u",id);
printf("密码：");
scanf("%u",password);
putchar('\n');
}

int confirm_user(struct USER*user,unsigned int id,unsigned int password)
{

while(1)
{
if(user==NULL) //要放前面
{
return -1;
}
if(id==user->id&&password==user->password)
{
return 1;
}
user=user->pnext;
}
}

int choose_num(struct USER**pphead,unsigned int *id,unsigned int *password)
{

int key=-1,kiss;
do{
printf("输入序号：");
scanf("%d",&kiss);
putchar('\n');
switch(kiss)
{
case 1:log_on(id,password);key=confirm_user(*pphead,*id,*password);
if(key!=1)
{
printf("账号或密码错误！\n\n");
}
break; //+break
case 2:AddUser(pphead);break;
case 3:write_userfile(*pphead);exit(1);break;
default:printf("输入指令错误！\n");
}

   }while(key!=1);

   return key;
}

void print_meau(void)
{
putchar('\n');
printf("%46c图书管理系统\n", ' ');
printf("\n\n");
printf("* * * * * * * * * * * * * * * * * * *\n");
printf("*1 录入图书                   *\n");
printf("*2 打印已录入图书信息          *\n");
printf("*3 搜素图书                   *\n");
printf("*4 删除已录入图书             *\n");
printf("*5 退出程序                   *\n");
printf("* * * * * * * * * * * * * * * * * * *\n");
printf(" \n\n ---输入功能前的相应序号进行操作---\n\n");
}

void ReadBook(struct Book**pphead)
{
   struct Book*book = (struct Book*)malloc(sizeof(struct Book));
   printf("---开始录入书籍---\n");
   getchar();
   printf("请输入书名：");
   gets(book->title);
   printf("请输入作者：");
   gets(book->author);
   printf("请输入售价：");
   scanf("%f", &book->price);
   printf("请输入出版日期(按“ 2018-12-12 ”的格式输入)：");
   scanf("%d-%d-%d", &book->date.year, &book->date.month, &book->date.day);
   getchar();//重要
   printf("请输入出版社：");
   //scanf("%s",book->publisher);
   gets(book->publisher);
   if(*pphead == NULL)
   {
            *pphead = book;
            book->pnext = NULL;
   }
   else
   {
            struct Book*temp = *pphead;
            while(1)
            {
                     if(temp->pnext == NULL)
                     {
                           break;
                     }
                     temp = temp->pnext;
            }
            temp->pnext = book;
            book->pnext = NULL;
   }
}
void print_book(struct Book*phead)
{
   struct Book *book = phead;
   printf("\n---开始打印图书信息---\n\n");
   if(phead == NULL)
   {
            printf("还未录入图书！\n");
   }
   else
   {
            while(1)
            {
                     if(book == NULL)
                     {
                           break;
                     }
                     else
                     {
                           printf("书名：%s\n", book->title);
                           printf("作者：%s\n", book->author);
                           printf("售价：%.2f", book->price);
                           printf("出版日期：%d-%d-%d\n", book->date.year, book->date.month, book->date.day);
                           printf("出版社：%s\n", book->publisher);
                           putchar('\n');
                           book = book->pnext;
                     }
            }
   }
   printf("\n---打印完毕---\n");
}
void scanf_search(char inform[])
{
printf("请输入搜索图书的的书名或作者：");
getchar(); //没有的话会异常退出
gets(inform);
}

struct Book*SearchBook(struct Book*book,char inform[])//搜索图书并返回指向该图书信息的指针，未找到则返回NULL
{
   while(1)
   {
         if(book == NULL)
         {
               return book;
         }
         if(!strcmp(book->title, inform) || !strcmp(book->author, inform))
         {
               return book;
         }
         book = book->pnext;
}
}

void print_search(struct Book*book,char inform[]) //打印被搜索的图书信息
{
   if(book == NULL)
   {
            printf("未找到图书信息！\n");
   }
   else
   {
      putchar('\n');
      printf("---已找到被搜索图书，图书信息如下---\n\n");
         do{
printf("书名：%s\n",book->title);
printf("作者：%s\n",book->author);
printf("售价：%.2f\n",book->price);
printf("出版日期：%d-%d-%d\n",book->date.year,book->date.month,book->date.day);
printf("出版社：%s\n",book->publisher);
putchar('\n');
   }while((book=SearchBook(book->pnext,inform))!=NULL);
   }
}
void cutoff_book(struct Book**pphead)//删除被搜索的图书信息 ,并释放内存
{
   char cutbook;
   struct Book *pervious = NULL;
   struct Book *current = *pphead;
   printf("请输入你要删除的图书的书名或作者：");
   getchar();
   gets(cutbook);
   /* if(current == NULL)
   {
            printf("未找到需要删除的图书\n");
            return; //返回
   }*/
   while(1)
   {
      if(current == NULL)
            {
                     break;
            }
            if(!strcmp(current->title, cutbook) || !strcmp(current->author, cutbook))
            {
                     break;
            }
            pervious = current;
            current = current->pnext;
   }
   if(current == NULL)
   {
            printf("未找到需要删除的图书！\n");
   }
   else
   {
            if(pervious==NULL)
            {
            *pphead=current->pnext;
}
else
{
pervious->pnext=current->pnext;
}
            free(current);
   }
}

void releasebook(struct Book*book)//释放链表空间
{
   struct Book *temp = NULL;
   while(book != NULL)
   {
            temp = book;
            book = book->pnext;
            free(temp);
   }
}

void releaseuser(struct USER*user)
{
struct USER *temp = NULL;
while(user!= NULL)
{
         temp = user;
         user = user->pnext;
         free(temp);
}
}

int main(void)
{
   int N,enter=-1;
   char inform;
   struct Book*phead = NULL;
   struct USER *pheaduser=NULL;
unsigned int id,password;

read_bookfile(&phead);
read_userfile(&pheaduser);
print_log();
enter= choose_num(&pheaduser,&id,&password);
if(enter==1)
{
printf("---登录成功---\n\n\n");
         print_meau();
         while(1)
         {
               printf("请输入指令：");
               scanf("%d", &N);
               putchar('\n');
               switch(N)
               {

               case 1:ReadBook(&phead); break;
               case 2:print_book(phead); break;
               case 3:scanf_search(inform);print_search(SearchBook(phead,inform),inform); break;
               case 4:cutoff_book(&phead); break;
               case 5:write_bookfile(phead);write_userfile(pheaduser);releasebook(phead);releaseuser(pheaduser);exit(1); break;
               default:printf("指令错误\n"); break;

               }
               putchar('\n');
         }
   }

   return 0;
}

人造人 发表于 2018-12-29 19:23:57

要调试程序

费曼发表于 2018-12-29 19:32:42

人造人发表于 2018-12-29 19:23
要调试程序

什么意思，我不会调试，是不是哪里有错误啊

人造人 发表于 2018-12-29 19:45:20

费曼发表于 2018-12-29 19:32
什么意思，我不会调试，是不是哪里有错误啊

要学习调试，程序代码量超过几百行后，恐怕没有人能够保证不会出错，出错了就要调试，调试很重要

从图中可以看到read_userfile函数没有按照预期工作

费曼发表于 2018-12-29 19:46:46

人造人发表于 2018-12-29 19:45
要学习调试，程序代码量超过几百行后，恐怕没有人能够保证不会出错，出错了就要调试，调试很重要

从图 ...

那你调试后要怎么修改呢，我现在不会，但我想知道怎么改

人造人 发表于 2018-12-29 20:55:52

费曼发表于 2018-12-29 19:46
那你调试后要怎么修改呢，我现在不会，但我想知道怎么改

抱歉，我选择退出，让其他人帮你吧

rencaixiaomeng 发表于 2018-12-29 22:32:46

刚刚的回复怎么没有了

rencaixiaomeng 发表于 2018-12-29 22:36:03

第一个错误 read_userfile函数里，while循环判断条件应该用判断文件结尾函数，而不是读取字符函数，应该改为 !feof(fp)

第二个错误 read_userfile函数里，第二个fscanf里字符串的密码前面加一个空格 fscanf(fp, " 密码：%u\n", &user->password);

第三个错误 write_userfile函数里，count变量每次循环都赋值为1，应该把count定义在while循环外面

第四个错误 read_bookfile函数里，while循环判断条件应该用判断文件结尾函数，而不是读取字符函数，应该改为 !feof(fp)

费曼发表于 2018-12-30 01:36:20

rencaixiaomeng 发表于 2018-12-29 22:36
第一个错误 read_userfile函数里，while循环判断条件应该用判断文件结尾函数，而不是读取字符函数，应该改 ...

照着你的改了，但还是不行

费曼发表于 2018-12-30 02:49:02

rencaixiaomeng 发表于 2018-12-29 22:36
第一个错误 read_userfile函数里，while循环判断条件应该用判断文件结尾函数，而不是读取字符函数，应该改 ...

我懂了，但是为什么注册两次，多出来一个
文件里的信息是这样的
--用户信息--
账号：2密码：2
--用户信息--
账号：1密码：1
--用户信息--
账号：4063608密码：4063608

费曼发表于 2018-12-30 02:49:33

rencaixiaomeng 发表于 2018-12-29 22:36
第一个错误 read_userfile函数里，while循环判断条件应该用判断文件结尾函数，而不是读取字符函数，应该改 ...

#include<stdio.h>
#include<stdlib.h>
#include<string.h>
#include<time.h>

struct Date
{
   int year;
   int month;
   int day;
};
struct Book
{
   char title;
   char author;
   float price;
   struct Date date;
   char publisher;
   struct Book*pnext;
};

struct USER
{
unsigned int id;
unsigned int password;
struct USER *pnext;
};

void read_bookfile(struct Book**pphead)
{
FILE*fp;
if((fp=fopen("图书信息.txt","r"))==NULL)
{
if((fp=fopen("图书信息.txt","w"))==NULL)
{
printf("打开文件失败！\n");
exit(EXIT_FAILURE);
}
fclose(fp);
if((fp=fopen("图书信息.txt","r"))==NULL)
{
printf("打开文件失败！\n");
exit(EXIT_FAILURE);
}
}
while(!feof(fp))
{ struct Book *book=(struct Book*)malloc(sizeof(struct Book));
fscanf(fp,"书名：%s\n",book->title);
fscanf(fp,"作者：%s\n",book->author);
fscanf(fp,"售价：%f\n",&book->price);
fscanf(fp,"出版日期:%d-%d-%d\n",&book->date.year,&book->date.month,&book->date.day);
fscanf(fp,"出版社:%s\n\n",book->publisher);
book->pnext=*pphead;
*pphead=book;
}
fclose(fp);
}

void write_bookfile(struct Book*book)
{
FILE*fp;
if((fp=fopen("图书信息.txt","w"))==NULL)
{
printf("打开文件失败！\n");
exit(EXIT_FAILURE);
}
while(book!=NULL)
{
fprintf(fp,"书名：%s\n",book->title);
fprintf(fp,"作者：%s\n",book->author);
fprintf(fp,"售价：%.2f\n",book->price);
fprintf(fp,"出版日期:%d-%d-%d\n",book->date.year,book->date.month,book->date.day);
fprintf(fp,"出版社:%s\n\n",book->publisher);
book=book->pnext;
}
fclose(fp);

}

void read_userfile(struct USER**pphead)
{
FILE*fp;
if((fp=fopen("用户信息.txt","r"))==NULL)
{
if((fp=fopen("用户信息.txt","w"))==NULL)
{
printf("打开文件失败！\n");
exit(EXIT_FAILURE);
}
fclose(fp);
if((fp=fopen("用户信息.txt","r"))==NULL)
{
printf("文件打开失败！\n");
exit(EXIT_FAILURE);
}
}
while(!feof(fp))
{
struct USER *user=(struct USER*)malloc(sizeof(struct USER));
fscanf(fp,"--用户信息--\n 账号：%u",&user->id);
fscanf(fp,"密码：%u\n",&user->password);
user->pnext=*pphead;
*pphead=user;
}
fclose(fp);
}

void write_userfile(struct USER*user)
{
FILE*fp;
if((fp=fopen("用户信息.txt","w"))==NULL)
{
printf("打开文件失败！\n");
exit(EXIT_FAILURE);
}
while(user!=NULL)
{
fprintf(fp,"--用户信息--\n 账号：%u",user->id);
fprintf(fp,"密码：%u\n",user->password);
user=user->pnext;
}
fclose(fp);

}

void print_log(void)
{
printf("\n\n----------------欢迎来到图书管理系统----------------------\n\n\n");
printf(" 1 登录\n");
printf(" 2 注册\n");
printf(" 3 退出\n\n\n");
printf(" ---请输入操作前的序号进行相应操作---\n\n");
}

void AddUser(struct USER**pphead)
{
struct USER*newuser=(struct USER*)malloc(sizeof(struct USER));
if(newuser==NULL)
{
printf("分配内存失败！\n");
exit(EXIT_FAILURE);
}
printf("--注册新账户--\n");
printf("账户：");
scanf("%u",&newuser->id);
printf("密码：");
scanf("%u",&newuser->password);
newuser->pnext=*pphead;
*pphead=newuser;
putchar('\n');
}

void log_on(unsigned int*id,unsigned int*password)
{
printf("——请输入账号和密码(未注册请先注册账户)——\n");
printf("账号：");
scanf("%u",id);
printf("密码：");
scanf("%u",password);
putchar('\n');
}

int confirm_user(struct USER*user,unsigned int id,unsigned int password)
{

while(1)
{
if(user==NULL) //要放前面
{
return -1;
}
if(id==user->id&&password==user->password)
{
return 1;
}
user=user->pnext;
}
}

int choose_num(struct USER**pphead,unsigned int *id,unsigned int *password)
{

int key=-1,kiss;
do{
printf("输入序号：");
scanf("%d",&kiss);
putchar('\n');
switch(kiss)
{
case 1:log_on(id,password);key=confirm_user(*pphead,*id,*password);
if(key!=1)
{
printf("账号或密码错误！\n\n");
}
break; //+break
case 2:AddUser(pphead);break;
case 3:write_userfile(*pphead);exit(1);break;
default:printf("输入指令错误！\n");
}

   }while(key!=1);

   return key;
}

void print_meau(void)
{
putchar('\n');
printf("%46c图书管理系统\n", ' ');
printf("\n\n");
printf("* * * * * * * * * * * * * * * * * * *\n");
printf("*1 录入图书                   *\n");
printf("*2 打印已录入图书信息          *\n");
printf("*3 搜素图书                   *\n");
printf("*4 删除已录入图书             *\n");
printf("*5 退出程序                   *\n");
printf("* * * * * * * * * * * * * * * * * * *\n");
printf(" \n\n ---输入功能前的相应序号进行操作---\n\n");
}

void ReadBook(struct Book**pphead)
{
   struct Book*book = (struct Book*)malloc(sizeof(struct Book));
   printf("---开始录入书籍---\n");
   getchar();
   printf("请输入书名：");
   gets(book->title);
   printf("请输入作者：");
   gets(book->author);
   printf("请输入售价：");
   scanf("%f", &book->price);
   printf("请输入出版日期(按“ 2018-12-12 ”的格式输入)：");
   scanf("%d-%d-%d", &book->date.year, &book->date.month, &book->date.day);
   getchar();//重要
   printf("请输入出版社：");
   //scanf("%s",book->publisher);
   gets(book->publisher);
   if(*pphead == NULL)
   {
            *pphead = book;
            book->pnext = NULL;
   }
   else
   {
            struct Book*temp = *pphead;
            while(1)
            {
                     if(temp->pnext == NULL)
                     {
                           break;
                     }
                     temp = temp->pnext;
            }
            temp->pnext = book;
            book->pnext = NULL;
   }
}
void print_book(struct Book*phead)
{
   struct Book *book = phead;
   printf("\n---开始打印图书信息---\n\n");
   if(phead == NULL)
   {
            printf("还未录入图书！\n");
   }
   else
   {
            while(1)
            {
                     if(book == NULL)
                     {
                           break;
                     }
                     else
                     {
                           printf("书名：%s\n", book->title);
                           printf("作者：%s\n", book->author);
                           printf("售价：%.2f", book->price);
                           printf("出版日期：%d-%d-%d\n", book->date.year, book->date.month, book->date.day);
                           printf("出版社：%s\n", book->publisher);
                           putchar('\n');
                           book = book->pnext;
                     }
            }
   }
   printf("\n---打印完毕---\n");
}
void scanf_search(char inform[])
{
printf("请输入搜索图书的的书名或作者：");
getchar(); //没有的话会异常退出
gets(inform);
}

struct Book*SearchBook(struct Book*book,char inform[])//搜索图书并返回指向该图书信息的指针，未找到则返回NULL
{
   while(1)
   {
         if(book == NULL)
         {
               return book;
         }
         if(!strcmp(book->title, inform) || !strcmp(book->author, inform))
         {
               return book;
         }
         book = book->pnext;
}
}

void print_search(struct Book*book,char inform[]) //打印被搜索的图书信息
{
   if(book == NULL)
   {
            printf("未找到图书信息！\n");
   }
   else
   {
      putchar('\n');
      printf("---已找到被搜索图书，图书信息如下---\n\n");
         do{
printf("书名：%s\n",book->title);
printf("作者：%s\n",book->author);
printf("售价：%.2f\n",book->price);
printf("出版日期：%d-%d-%d\n",book->date.year,book->date.month,book->date.day);
printf("出版社：%s\n",book->publisher);
putchar('\n');
   }while((book=SearchBook(book->pnext,inform))!=NULL);
   }
}
void cutoff_book(struct Book**pphead)//删除被搜索的图书信息 ,并释放内存
{
   char cutbook;
   struct Book *pervious = NULL;
   struct Book *current = *pphead;
   printf("请输入你要删除的图书的书名或作者：");
   getchar();
   gets(cutbook);
   /* if(current == NULL)
   {
            printf("未找到需要删除的图书\n");
            return; //返回
   }*/
   while(1)
   {
      if(current == NULL)
            {
                     break;
            }
            if(!strcmp(current->title, cutbook) || !strcmp(current->author, cutbook))
            {
                     break;
            }
            pervious = current;
            current = current->pnext;
   }
   if(current == NULL)
   {
            printf("未找到需要删除的图书！\n");
   }
   else
   {
            if(pervious==NULL)
            {
            *pphead=current->pnext;
}
else
{
pervious->pnext=current->pnext;
}
            free(current);
   }
}

void releasebook(struct Book*book)//释放链表空间
{
   struct Book *temp = NULL;
   while(book != NULL)
   {
            temp = book;
            book = book->pnext;
            free(temp);
   }
}

void releaseuser(struct USER*user)
{
struct USER *temp = NULL;
while(user!= NULL)
{
         temp = user;
         user = user->pnext;
         free(temp);
}
}

int main(void)
{
   int N,enter=-1;
   char inform;
   struct Book*phead = NULL;
   struct USER *pheaduser=NULL;
unsigned int id,password;

read_bookfile(&phead);
read_userfile(&pheaduser);
print_log();
enter= choose_num(&pheaduser,&id,&password);
if(enter==1)
{
printf("---登录成功---\n\n\n");
         print_meau();
         while(1)
         {
               printf("请输入指令：");
               scanf("%d", &N);
               putchar('\n');
               switch(N)
               {

               case 1:ReadBook(&phead); break;
               case 2:print_book(phead); break;
               case 3:scanf_search(inform);print_search(SearchBook(phead,inform),inform); break;
               case 4:cutoff_book(&phead); break;
               case 5:write_bookfile(phead);write_userfile(pheaduser);releasebook(phead);releaseuser(pheaduser);exit(1); break;
               default:printf("指令错误\n"); break;

               }
               putchar('\n');
         }
   }

   return 0;
}

费曼发表于 2018-12-30 02:51:43

rencaixiaomeng 发表于 2018-12-29 22:36
第一个错误 read_userfile函数里，while循环判断条件应该用判断文件结尾函数，而不是读取字符函数，应该改 ...

图书信息的文件也有这中情况
书名：x>
作者：
售价：0.00
出版日期:0-0-0
出版社:

书名：1
作者：1
售价：1.00
出版日期:2-2-2
出版社:1

费曼发表于 2018-12-30 04:07:58

rencaixiaomeng 发表于 2018-12-29 22:36
第一个错误 read_userfile函数里，while循环判断条件应该用判断文件结尾函数，而不是读取字符函数，应该改 ...

好像是用feof()导致多读取的一次

rencaixiaomeng 发表于 2018-12-30 14:53:21

你在读取文件的前，加上一个ftell(fp)判断文件长度

页: [1]

鱼C论坛's Archiver

为什么退出程序后文件中的信息无法导入链表！求助！！