图书管理系统（有很多漏洞）怎么改最好

/*题目：简单图书管理系统
要求：
综合运用C语言的基本知识和程序设计方法，开发一个简单的图书管理系统。
具体功能要求如下：
1． 图书管理：增加图书、修改图书、删除图书、统计图书；
2． 借阅管理：查找图书、借阅图书、归还图书、借阅图书统计；
3． 读者管理：申请读者卡、删除读者卡、修改读者卡；
4． 馆员管理：添加管理员、修改管理员信息、删除管理员。
根据以上功能说明，设计馆员信息、读者信息、读者卡信息、图书信息的存储结构，数据存储在文件中，界面要求有合理的提示，每个功能可以设立菜单，根据提示可以完成相关的功能要求。在编译、连接与运行程序的过程中，应充分利用调试方法与工具，同时不断总结编写和调试较大型程序的经验与体会，按设计的要求写出设计报告。
这有个以前用过的程序，可以自己改改使用，但是有些功能好像有问题，会中断运行。*/

#include<stdio.h>
#include<string.h>
#include<conio.h>
#include<stdlib.h>
#include<ctype.h>
#define STACK_INIT_SIZE 10
#define OK 1
#define TRUE 1
#define FALSE 0
#define ERROR 0

struct student /*定义学生类型，用于存放借出的书籍*/
{
 int carnum;
 char lendbook[10];
}student[1000];

struct employ /*定义职工类型*/
{
 int employnum;
 char employname[15];
 int employage;
 char employsex[2];
 char employleve[10];
 long int employtage;
}employ[50];

struct book /*定义书的类型*/
{
 int booknum;
 char bookname[10];
 char bookcreat[10];
 int turefalse; /*用于借书和还书模块判断一本书是否借出的条件*/
}book[1000];

struct car /*借书卡的数据类型*/
{
 int carnum;
 char studentname[10];
 int studentclass;
}car[100];

huanbook() /*还书函数*/
{
 FILE *fp,*fp2; /*定义两个文件指针，fp2用于修改数据时设立临时文件用，防止数据遭破坏*/
 int i,n;
 int carnum;
 char lendbook[10];

 printf("请你输入你的卡号/n");
 scanf("%d",&carnum);
 fp=fopen("car.txt","r"); /*读取卡号记录*/
 for(i=0;fread(&car[i],sizeof(struct car),1,fp)!=0;i++) /*for循环判断卡号是否存在*/
 {
  if(car[i].carnum==carnum) /*卡号存在，进入下一循环*/
  {
   n=i;
   fclose(fp);
   printf("请输入你要还的书的名字/n");
   scanf("%s",lendbook);
   fp=fopen("record.txt","r");
   for(i=0;fread(&student[i],sizeof(struct student),1,fp)!=0;i++) /*判断是否借阅了输入的书*/
   {
    if(strcmp(student[i].lendbook,lendbook)==0) /*借阅了该书，进入下一循环，否则出错显示*/
    {
     fclose(fp);
     fp=fopen("record.txt","r");
     fp2=fopen("bookl.txt","w");
     for(i=0;fread(&student[i],sizeof(struct student),1,fp)!=0;i++)
     {
      if(strcmp(student[i].lendbook,lendbook)==0)
      {
       continue; /*删除还掉的书的借书记录*/
      }
      fwrite(&student[i],sizeof(struct student),1,fp2); /*写入原来没还的书的记录*/
     }
     fclose(fp);
     fclose(fp2);
     fp=fopen("record.txt","w");
     fp2=fopen("bookl.txt","r");
     for(i=0;fread(&student[i],sizeof(struct student),1,fp2)!=0;i++)
     {
      fwrite(&student[i],sizeof(struct student),1,fp); /*将借书记录信息写回*/
     }
     fclose(fp);
     fclose(fp2);
     fopen("bookl.txt","w"); /*清临时文件的记录*/
     fclose(fp2);
     fp=fopen("book.txt","r");
     fp2=fopen("bookl.txt","w");
     for(i=0;fread(&book[i],sizeof(struct book),1,fp)!=0;i++) /*将书的记录写入临时文件，防止因为修改信息破坏以前的记录*/
     {
      if(i==n)
      {
       book[i].turefalse=1;
       fwrite(&book[i],sizeof(struct book),1,fp2); /*将还的书的原来状态设为无人借阅的*/
       continue;
      }
      fwrite(&book[i],sizeof(struct book),1,fp2);
     }
     fclose(fp);
     fclose(fp2);
     fp=fopen("book.txt","w");
     fp2=fopen("bookl.txt","r");
     for(i=0;fread(&book[i],sizeof(struct book),1,fp2)!=0;i++)
     {
      fwrite(&book[i],sizeof(struct book),1,fp); /*将临时文件写回*/
     }
     fclose(fp);
     fclose(fp2);
     fopen("bookl.txt","w"); /*清临时文件*/
     fclose(fp2);
     printf("还书完毕，按任意键返回/n");
     getch();
     return 1;
    }
   }
   printf("你没有借这样的书，任意键返回/n"); /*出错提示*/
   fclose(fp);
   getch();
   return 0;
  }
 }
 printf("系统没这样的卡，和管理员联系,按任意键返回/n"); /*出错提示*/
 fclose(fp);
 getch();
}

findbook()
{
 FILE *fp;
 char bookname[10];
 int ture,i;
 fp=fopen("book.txt","r");
 printf("请输入你要查找的书名/n");
 scanf("%s",bookname);
 for(i=0;fread(&book[i],sizeof(struct book),1,fp)!=0;i++)
 {
  if(strcmp(bookname,book[i].bookname)==0)
  {
   if(book[i].turefalse==1)
   {
    printf("这本书的详细资料是：%d %s %s 此书现在无人借阅/n按任意键返回/n",book[i].booknum,book[i].bookname,book[i].bookcreat);
   }
   else
   {
    printf("这本书已经有人借出/n");
    fclose(fp);
    return 0;
   }
   fclose(fp);
   return FALSE;
  }
 }
 printf("没有你要查询的书籍/n");
 fclose(fp);
 return FALSE;
}

findbook1()
{
 FILE *fp;
 char bookcreat[10];
 int ture,i;
 fp=fopen("book.txt","r");
 printf("请输入你要查找的作者名/n");
 scanf("%s",bookcreat);
 for(i=0;fread(&book[i],sizeof(struct book),1,fp)!=0;i++)
 {
  if(strcmp(bookcreat,book[i].bookcreat)==0)
  {
   if(book[i].turefalse==1)
   {
     printf("这本书的详细资料是：%d %s %s 此书现在无人借阅/n按任意键返回/n",book[i].booknum,book[i].bookname,book[i].bookcreat);
   }
   else
   {
    printf("这本书已经有人借出/n");
    fclose(fp);
    return 0;
   }
   fclose(fp);
   return FALSE;
  }
 }
 printf("没有你要查询的书籍/n");
 fclose(fp);
 return FALSE;
}

lendcount()
{
 FILE *fp;
 int i,n=0;
 fp=fopen("record.txt","r");
 for(i=0;fread(&student[i],sizeof(struct student),1,fp)!=0;i++)
 {
  printf("卡号：%d 借出的书籍：%s /n",student[i].carnum,student[i].lendbook);
  n=n+1;
 }
 fclose(fp);
 printf("目前共有%d本书借出/n",n);
 printf("按任意键/n");
 getch();
 return n;
}

chabook()
{
 char ch5;
 do
 {
  printf("---------------欢迎进入图书查询系统！--------------/n");
  printf(" 1：<按书名查找>/n");
  printf(" 2：<按作者查找>/n");
  printf(" 0：<返回>/n");
  printf("请输入0--2,其他输入非法！/n");
  scanf("%s",&ch5);
  switch(ch5)
  {
   case '1':findbook();getch();break;
   case '2':findbook1();getch();break;
   case '0':break;
   default:printf("无此操作/n");getch();break;
  }
 }while(ch5!='0');
 return FALSE;
}

lendbook()
{
 FILE *fp,*fp2;
 int i,n;
 int carnum;
 printf("请你输入你的卡号/n");
 scanf("%d",&carnum);
 fp=fopen("car.txt","r");
 for(i=0;fread(&car[i],sizeof(struct car),1,fp)!=0;i++)
 {
  if(car[i].carnum==carnum)
  {
   n=i;
   fclose(fp);
   printf("请输入你要借阅的书的名字/n");
   scanf("%s",student[n].lendbook);
   fp=fopen("book.txt","r");
   for(i=0;fread(&book[i],sizeof(struct book),1,fp)!=0;i++)
   {
    if(strcmp(book[i].bookname,student[n].lendbook)==0)
    {
     if(book[i].turefalse==0)
     {
      printf("对不起，此书有人借出，请借其他书/n");
      fclose(fp);
      getch();
      return;
     }
     else
      fclose(fp);
     fp=fopen("record.txt","a+");
     student[n].carnum=carnum;
     fwrite(&student[n],sizeof(struct student),1,fp);
     fclose(fp);
     fp=fopen("book.txt","r");
     fp2=fopen("bookl.txt","w");
     for(i=0;fread(&book[i],sizeof(struct book),1,fp)!=0;i++)
     {
      if(strcmp(book[i].bookname,student[n].lendbook)==0)
      {
       book[i].turefalse=0;
       fwrite(&book[i],sizeof(struct book),1,fp2);
       continue;
      }
      fwrite(&book[i],sizeof(struct book),1,fp2);
     }
     fclose(fp);
     fclose(fp2);
     fp=fopen("book.txt","w");
     fp2=fopen("bookl.txt","r");
     for(i=0;fread(&book[i],sizeof(struct book),1,fp2)!=0;i++)
     {
      fwrite(&book[i],sizeof(struct book),1,fp);
     }
     fclose(fp);
     fclose(fp2);
     fopen("bookl.txt","w");
     fclose(fp2);
     printf("借书完毕，按任意键返回/n");
     getch();
     return;
    }
   }
   printf("不存在这样的书，任意键返回/n");
   fclose(fp);
   getch();
   return;
  }
 }
 printf("你的卡号不存在，请申请新卡,按任意键返回/n");
 fclose(fp);
 getch();
}

carcount()
{
 FILE *fp;
 int i,n=0;
 fp=fopen("car.txt","r");
 for(i=0;fread(&car[i],sizeof(struct car),1,fp)!=0;i++)
 {
  printf("第%d张卡<卡号：%d 姓名：%s 班级：%d>/n",i+1,car[i].carnum,car[i].studentname,car[i].studentclass);
  n=n+1;
 }
 fclose(fp);
 printf("目前共有%d本书/n",n);
 printf("按任意键/n");
 getch();
}

delcar()
{
 FILE *fp,*fp2;
 int i;
 int carnum;
 char choice;
 fp=fopen("car.txt","r");
 fp2=fopen("bookl.txt","w");
 printf("请输入你要删除的卡号/n");
 printf("如果你输入的卡号存在，系统自动删除该信息！如果不存在，系统不做任何改动/n");
 scanf("%d",&carnum);
 for(i=0;fread(&car[i],sizeof(struct car),1,fp)!=0;i++)
 {
  if(car[i].carnum!=carnum)
  {
   fwrite(&car[i],sizeof(struct car),1,fp2);
  }
 }
 fclose(fp);
 fclose(fp2);
 printf("是否真的要删除该卡？删除后该书籍的所有信息将无法恢复《Y/N》/n");
 scanf("%s",&choice);
 if(choice=='y'||choice=='Y')
 {
  fp=fopen("car.txt","w");
  fp2=fopen("bookl.txt","r");
  for(i=0;fread(&car[i],sizeof(struct car),1,fp2)!=0;i++)
  {
   fwrite(&car[i],sizeof(struct car),1,fp);
  }
  fclose(fp);
  fclose(fp2);
  fp2=fopen("bookl.txt","w");
  fclose(fp2);
  printf("按任意键返回/n");
  getch();
  return;
 }
 else
 {
  printf("按任意键返回/n");
  getch();
  return;
 }
}

addcar()
{
 FILE *fp;
 int i=0;
 fp=fopen("car.txt","a+");
 printf("请你输入卡号/n");
 scanf("%d",&car[i].carnum);
 printf("请你输入学生姓名/n");
 scanf("%s",car[i].studentname);
 printf("请你输入班级/n");
 scanf("%d",&car[i].studentclass);
 fwrite(&car[i],sizeof(struct car),1,fp);
 fclose(fp);
 printf("输入完毕，任意键返回/n");
 getch();
}

changemploy()
{
 FILE *fp,*fp2;
 char employname[10],choice;
 int i;
 fp=fopen("employ.txt","r");
 fp2=fopen("bookl.txt","w");
 printf("请你输入要修改的职工的名字/n");
 scanf("%s",employname);
 for(i=0;fread(&employ[i],sizeof(struct employ),1,fp)!=0;i++)
 {
  if(strcmp(employ[i].employname,employname)==0)
  {
   printf("你所要修改的职工的资料如下，请选择你要修改的内容/n");
   printf("<职工号:%d职工名：%s 年龄：%d 性别：%s 学历：%s 工资：%d>/n",employ[i].employnum,employ[i].employname,employ[i].employage,employ[i].employsex,employ[i].employleve,employ[i].employtage);
   printf("2：修改职工名/n");
   printf("3：修改职工年龄/n");
   printf("4：修改职工工资/n");
   printf("5：修改职工学历/n");
   printf("请输入1-5:");
   scanf("%s",&choice);
   switch(choice)
   {
    case '1':
    {
     printf("请输入新的职工号/n");
     scanf("%d",&employ[i].employnum);
     fwrite(&employ[i],sizeof(struct employ),1,fp2);
    }
    break;
    case '2':
    {
     printf("请输入新的职工姓名/n");
     scanf("%s",employ[i].employname);
     fwrite(&employ[i],sizeof(struct employ),1,fp2);
    }
    break;
    case '3':
    {
     printf("请输入新的年龄/n");
     scanf("%d",&employ[i].employage);
     fwrite(&employ[i],sizeof(struct employ),1,fp2);
    }
    break;
    case '4':
    {
     printf("请输入新的职工工资/n");
     scanf("%d",&employ[i].employtage);
     fwrite(&employ[i],sizeof(struct employ),1,fp2);
    }
    break;
    case '5':
    {
     printf("请输入新的职工学历/n");
     scanf("%s",employ[i].employleve);
     fwrite(&employ[i],sizeof(struct employ),1,fp2);
    }
    default:printf("没有这样的操作");
    break;
   }
   continue;
  }
  fwrite(&employ[i],sizeof(struct employ),1,fp2);
 }
 fclose(fp);
 fclose(fp2);
 fp=fopen("employ.txt","w");
 fp2=fopen("bookl.txt","r");
 for(i=0;fread(&employ[i],sizeof(struct employ),1,fp2)!=0;i++)
 {
  fwrite(&employ[i],sizeof(struct employ),1,fp);
 }
 fclose(fp);
 fclose(fp2);
 fp2=fopen("bookl.txt","w");
 fclose(fp2);
 printf("按任意键返回/n");
 getchar();
 return;
}

delemploy()
{
 FILE *fp,*fp2;
 int i;
 char employname[10],choice;
 fp=fopen("employ.txt","r");
 fp2=fopen("bookl.txt","w");
 printf("请输入你要删除的职工名/n");
 printf("如果你输入的职工存在，系统自动删除该信息！如果不存在，系统不做任何改动/n");
 scanf("%s",employname);
 for(i=0;fread(&employ[i],sizeof(struct employ),1,fp)!=0;i++)
 {
  if(strcmp(employname,employ[i].employname)!=0)
  {
   fwrite(&employ[i],sizeof(struct employ),1,fp2);
  }
 }
 fclose(fp);
 fclose(fp2);
 printf("是否真的要删除该职工信息？删除后的所有信息将无法恢复《Y/N》/n");
 scanf("%s",&choice);
 if(choice=='y'||choice=='Y')
 {
  fp=fopen("employ.txt","w");
  fp2=fopen("bookl.txt","r");
  for(i=0;fread(&employ[i],sizeof(struct employ),1,fp2)!=0;i++)
  {
   fwrite(&employ[i],sizeof(struct employ),1,fp);
  }
  fclose(fp);
  fclose(fp2);
  fp2=fopen("bookl.txt","w");
  fclose(fp2);
  printf("按任意键返回/n");
  getch();
  return TRUE;
 }
 else
 {
  printf("按任意键返回/n");
  getch();
  return FALSE;
 }
}

employcount()
{
 FILE *fp;
 int i,n=0;
 fp=fopen("employ.txt","r");
 for(i=0;fread(&employ[i],sizeof(struct employ),1,fp)!=0;i++)
 {
  printf("第%d职工的信息如下：/n<职工号：%d 职工名：%s 年龄：%d 性别：%s 学历：%s 工资：%d>/n",n+1,employ[i].employnum,employ[i].employname,employ[i].employage,employ[i].employsex,employ[i].employleve,employ[i].employtage);
  n++;
 }
 fclose(fp);
 printf("目前共有%d个职工/n",n);
 printf("按任意键返回/n");
}

addemploy()
{
 FILE *fp;
 char choice='y';
 int i=1;
 fp=fopen("employ.txt","a+");
 while(choice=='y'||choice=='Y')
 {
  printf("请你输入职工号码/n");
  scanf("%d",&employ[i].employnum);
  printf("请你输入职工名/n");
  scanf("%s",employ[i].employname);
  printf("请输入职工年龄/n");
  scanf("%d",&employ[i].employage);
  printf("请你输入性别/n");
  scanf("%s",employ[i].employsex);
  printf("请你输入职工的学历水平/n");
  scanf("%s",employ[i].employleve);
  printf("请输入职工的工资/n");
  scanf("%d",&employ[i].employtage);
  fwrite(&employ[i],sizeof(struct employ),1,fp);
  printf("是否要输入下个职工信息？/n");
  scanf("%s",&choice);
 }
 printf("按任意键返回/n");
 fclose(fp);
}

addbook()
{
 FILE *fp;
 int i=0;
 char choice='y';
 fp=fopen("book.txt","a+");
 while(choice=='y'||choice=='Y')
 {
  i++;
  printf("请你输入第%d本书的序号/n",i);
  scanf("%d",&book[i].booknum);
  printf("请你输入书名/n");
  scanf("%s",book[i].bookname);
  printf("请你输入书的作者/n");
  scanf("%s",book[i].bookcreat);
  printf("请设为1或0，1代表书还没人借，0表示书已经借出，设其他值，程序运行时无法得出正常结果/n");
  printf("请你设定书的状态/n");
  scanf("%d",&book[i].turefalse);
  fwrite(&book[i],sizeof(struct book),1,fp);
  printf("是否要输入下本书/n");
  scanf("%s",&choice);
 }
 fclose(fp);
}

bookcount()
{
 FILE *fp;
 int i,n=0;
 fp=fopen("book.txt","r");
 for(i=0;fread(&book[i],sizeof(struct book),1,fp)!=0;i++)
 {
  if(book[i].booknum!=0&&strlen(book[i].bookname)!=0&&strlen(book[i].bookcreat)!=0)
  {
   printf("第%d本书<序号：%d 书名：%s 作者：%s 状态：%d>/n",i+1,book[i].booknum,book[i].bookname,book[i].bookcreat,book[i].turefalse);
   n=n+1;
  }
 }
 fclose(fp);
 printf("目前共有%d本书/n",n);
 printf("按任意键/n");
}

delbook()
{
 FILE *fp,*fp2;
 int i;
 char bookname[10],choice;
 fp=fopen("book.txt","r");
 fp2=fopen("bookl.txt","w");
 printf("请输入你要删除的书名/n");
 printf("如果你输入的书名存在，系统自动删除该信息！如果不存在，系统不做任何改动/n");
 scanf("%s",bookname);
 for(i=0;fread(&book[i],sizeof(struct book),1,fp)!=0;i++)
 {
  if(strcmp(bookname,book[i].bookname)!=0)
  {
   fwrite(&book[i],sizeof(struct book),1,fp2);
  }
 }
 fclose(fp);
 fclose(fp2);
 printf("是否真的要删除该书籍？删除后该书籍的所有信息将无法恢复《Y/N》/n");
 scanf("%s",&choice);
 if(choice=='y'||choice=='Y')
 {
  fp=fopen("book.txt","w");
  fp2=fopen("bookl.txt","r");
  for(i=0;fread(&book[i],sizeof(struct book),1,fp2)!=0;i++)
  {
   fwrite(&book[i],sizeof(struct book),1,fp);
  }
  fclose(fp);
  fclose(fp2);
  fp2=fopen("bookl.txt","w");
  fclose(fp2);
  printf("按任意键返回/n");
  getch();
  return;
 }
 else
 {
  printf("按任意键返回/n");
  getch();
  return;
 }
}

changebook()
{
 FILE *fp,*fp2;
 char bookname[10],choice;
 int i;
 fp=fopen("book.txt","r");
 fp2=fopen("bookl.txt","w");
 printf("请你输入要修改的书籍的书字/n");
 scanf("%s",bookname);
 for(i=0;fread(&book[i],sizeof(struct book),1,fp)!=0;i++)
 {
  if(strcmp(book[i].bookname,bookname)==0)
  {
   printf("你所要修改的书的资料如下，请选择你要修改的内容/n");
   printf("序号：〈%d〉 书名：〈%s〉 作者：〈%s〉 /n",book[i].booknum,book[i].bookname,book[i].bookcreat);
   printf("1：修改书的序号/n");
   printf("2：修改书名/n");
   printf("3：修改作者/n");
   printf("请输入1-3:");
   scanf("%s",&choice);
   switch(choice)
   {
    case '1':
    {
     printf("请输入新的序号/n");
     scanf("%d",&book[i].booknum);
     fwrite(&book[i],sizeof(struct book),1,fp2);
    }break;
    case '2':
    {
     printf("请输入新的书名/n");
     scanf("%s",book[i].bookname);
     fwrite(&book[i],sizeof(struct book),1,fp2);
    }break;
    case '3':
    {
     printf("请输入新的作者/n");
     scanf("%s",book[i].bookcreat);
     fwrite(&book[i],sizeof(struct book),1,fp2);
    }break;
    defaut:printf("没有这样的操作");break;
   }
   continue;
  }
  fwrite(&book[i],sizeof(struct book),1,fp2);
 }
 fclose(fp);
 fclose(fp2);
 fp=fopen("book.txt","w");
 fp2=fopen("bookl.txt","r");
 for(i=0;fread(&book[i],sizeof(struct book),1,fp2)!=0;i++)
 {
  fwrite(&book[i],sizeof(struct book),1,fp);
 }
 fclose(fp2);
 fp2=fopen("bookl.txt","w");
 fclose(fp2);
 printf("按任意键返回/n");
 getchar();
 return;
}
main()
{
 char ch1,ch2,ch3,ch4,ch5;
 do
 {  
  printf("/t/t请你选择操作类型:/n");
  printf(" 1：<查阅图书>/n");
  printf(" 2：<借阅图书>/n");
  printf(" 3：<管理系统>/n");
  printf(" 4：<还书>/n");
  printf(" 0：<退出>/n");
  printf("请输入0--4/n");
  scanf("%s",&ch1);
  switch(ch1)
  {
   case '1':chabook();break;
   case '2':lendbook();;break;
   case '3':{
   do
   {
    printf("---------------欢迎进入管理系统！--------------/n");
    printf(" 1：<增加图书>/n");
    printf(" 2：<删除图书>/n");
    printf(" 3：<修改图书资料>/n");
    printf(" 4：<书籍统计>/n");
    printf(" 5：<职工管理系统>/n");
    printf(" 6：<学生管理系统>/n");
    printf(" 0：<返回>/n");
    printf("请输入0--6,其他输入非法！/n");
    scanf("%s",&ch2);
    switch(ch2)
    {
     case '1':addbook();
     break;
     case '2':delbook();break;
     case '3':changebook();break;
     case '4':bookcount();getch();break;
     case '5':
     {
      do
      {
       printf("---------------欢迎进入职工管理系统！--------------/n");
       printf(" 1：<增加员工>/n");
       printf(" 2：<删除员工>/n");
       printf(" 3：<修改员工资料>/n");
       printf(" 4：<员工统计>/n");
       printf(" 0：<返回>/n");
       printf("请输入0--4,其他输入非法！/n");
       scanf("%s",&ch3);
       switch(ch3)
       {     
        case '1':addemploy();getch();break;
        case '2':delemploy();break;
        case '3':changemploy();break;
        case '4':employcount();getch();break;
        case '0':break;
        default:printf("无此操作/n");getch();break;
       }
      }while(ch3!='0');
     }break;
     case '6':
     {
      do
      {
       printf("---------------欢迎进入学生管理系统！--------------/n");
       printf(" 1：<申请新卡>/n");
       printf(" 2：<删除卡号>/n");
       printf(" 3：<借书统计>/n");
       printf(" 4：<卡号统计>/n");
       printf(" 0：<返回>/n");
       printf("请输入0--4,其他输入非法！/n");
       scanf("%s",&ch4);
       switch(ch4)
       {
        case '1':addcar();break;
        case '2':delcar();break;
        case '3':lendcount();break;
        case '4':carcount();break;
        case '0':break;
        default:printf("无此操作/n");getch();break;
       }
      }while(ch4!='0');
     }break;
     case '0':break;
     default:printf("无此操作/n");getch();break;
    }
   }while(ch2!='0');}break;
   case '4':huanbook();break;
   case '0':break;
   default:printf("无此操作/n");getch();break;
  }
 }while(ch1!='0');
}