#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')
{
   printf("请你输入第%d本书的序号\n",i+1);
   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');
}

哦。。。