# Including
# Including
# Including
# Including
#define STACK_INIT_SIZE 10
# Define OK 1
# Define true 1
# Define false 0
# Definition error 0
The structure student/* defines the student type, which is used to store the lent books */
{
int carnum
char lend book[ 10]；
} students [1000];
Structure employee/* Define employee type */
{
int employnum
char employ name[ 15]；
int employage
char employex[2]；
char employ leve[ 10]；
long int employtage
} employment [50];
Struct book /* defines the type of book */
{
int booknum
char bookname[ 10]；
char book creat[ 10]；
Int turefalse/* Conditions for book lending and returning module to judge whether books are lent or not */
} book[ 1000]；
Struct car /* data type of library card */
{
int carnum
char student name[ 10]；
int
} car [100];
Huanbook() /* Return function */
{
FILE *fp, * fp2/* defines two file pointers. Fp2 is used to create temporary files when modifying data to prevent data from being destroyed */
int i，n；
int carnum
char lend book[ 10]；
Printf ("Please enter your card number \ n");
scanf("%d "，& ampcarnum)；
fp=fopen("car.txt "，" r ")； /* Read the card number record */
for(I = 0； Fred (&car [i], sizeof(struct car), 1, fp)! =0; I) /*for loop to determine whether the card number exists */
{
If (the car [me]. Carnum==carnum) /* Card number exists, next cycle */
{
n = I；
fclose(FP)；
Printf ("Please enter the name of the book you want to return \ n");
scanf("%s "，lend book)；
fp=fopen("record.txt "，" r ")；
for(I = 0； Fred (& student [i], sizeof (structural student), 1, fp)! =0; I) /* Judge whether the entered book is borrowed */
{
If (strcmp (student [I])。 Lendbook) = = 0)/* Borrow a book and enter the next cycle, otherwise an error will be displayed */
{
fclose(FP)；
fp=fopen("record.txt "，" r ")；
fp2=fopen("bookl.txt "，" w ")；
for(I = 0； Fred (& student [i], sizeof (structural student), 1, fp)! =0; I)
{
if(strcmp(student[i])。 lendbook，lendbook)==0)
{
Continue; /* Delete the borrowing record of returned books */
}
fwrite(& amp； student[i]，sizeof(struct student)， 1，fp2)； /* Write down the records of books that have not been returned */
}
fclose(FP)；
fclose(fp2)；
fp=fopen("record.txt "，" w ")；
fp2=fopen("bookl.txt "，" r ")；
for(I = 0； Fred (& student [i], sizeof (structural student), 1, fp2)! =0; I)
{
fwrite(& amp； Student [i], sizeof (structural student), 1, FP); /* Write back the book borrowing record information */
}
fclose(FP)；
fclose(fp2)；
fopen("bookl.txt "，" w ")； /* Clear the records of temporary files */
fclose(fp2)；
fp=fopen("book.txt "，" r ")；
fp2=fopen("bookl.txt "，" w ")；
for(I = 0； Fred (& book [i], sizeof (structural book), 1, fp)! =0; I) /* Write the records of books into a temporary file to prevent the previous records from being destroyed by modification information */
{
If (i==n)
{
Book [me]. ture false = 1；
fwrite(& amp； book[i]，sizeof(struct book)， 1，fp2)； /* Set the original status of the returned book to no one to borrow */
Continue;
}
fwrite(& amp； book[i]，sizeof(struct book)， 1，fp2)；
}
fclose(FP)；
fclose(fp2)；
fp=fopen("book.txt "，" w ")；
fp2=fopen("bookl.txt "，" r ")；
for(I = 0； Fred (& book [i], sizeof (structural book), 1, fp2)! =0; I)
{
fwrite(& amp； book[i]，sizeof(struct book)， 1，FP)； /* Write the temporary file back to */
}
fclose(FP)；
fclose(fp2)；
fopen("bookl.txt "，" w ")； /* Clear temporary documents */
fclose(fp2)；
Printf ("Return the book, press any key to return \ n");
getch()；
Returns1;
}
}
Printf ("You didn't borrow such a book, press any key to return \ n"); /* Error prompt */
fclose(FP)；
getch()；
Returns 0;
}
}
Printf ("This card is not available in the system, please contact the administrator and press any key to return \ n"); /* Error prompt */
fclose(FP)；
getch()；
}
findbook()
{
FILE * fp
char bookname[ 10]；
Int ture, me;
fp=fopen("book.txt "，" r ")；
Printf ("Please enter the title of the book you are looking for \ n");
Scanf("%s ",book name);
for(I = 0； Fred (& book [i], sizeof (structural book), 1, fp)! =0; I)
{
if(strcmp(bookname，book[i])。 Book name) ==0)
{
If (book [me]. turefalse== 1)
{
Printf ("The details of this book are: %d %s %s This book has not been borrowed \ nPress any key to return \ n", Book [i]. Booknum，Book [i]。 Book title, book [i]. bookcreat)；
}
other
fclose(FP)；
Returns FALSE
}
}
Printf ("No book you want to query \ n");
fclose(FP)；
Returns FALSE
}
findbook 1()
{
FILE * fp
char book creat[ 10]；
Int ture, me;
fp=fopen("book.txt "，" r ")；
Printf ("Please enter the name of the author you are looking for \ n");
scanf("%s "，bookcreat)；
for(I = 0； Fred (& book [i], sizeof (structural book), 1, fp)! =0; I)
{
if(strcmp(bookcreat，book[i])。 bookcreat)==0)
{
If (book [me]. turefalse== 1)
{
Printf ("The details of this book are: %d %s %s This book has not been borrowed \ nPress any key to return \ n", Book [i]. Booknum，Book [i]。 Book title, book [i]. bookcreat)；
}
other
fclose(FP)；
Returns FALSE
}
}
Printf ("No book you want to query \ n");
fclose(FP)；
Returns FALSE
}
lendcount()
{
FILE * fp
int i，n = 0；
fp=fopen("record.txt "，" r ")；
for(I = 0； Fred (& student [i], sizeof (structural student), 1, fp)! =0; I)
{
Printf ("Book with card number %d:% s \ n", student [i]. Kanum, student [me]. lend book)；
n = n 1；
}
fclose(FP)；
Printf ("* * has lent out %d books \n ",n);
Printf ("Press any key \ n");
getch()；
Returns n;
}
Chabuke ()
{
char ch5
do
{
Printf ("-Welcome to the book inquiry system! -\ n ")；
printf(" 1:\ n ")；
printf(" 2:\ n ")；
printf(" 0:\ n ")；
Printf ("Please enter 0-2, other inputs are illegal! \ n ")；
scanf("%s "，& ampch5)；
Switch (ch5)
{
case ' 1 ':find book()； getch()； Break;
Case "2": findbook1(); getch()； Break;
Case "0": break;
Default value: printf ("No such operation \ n"); getch()； Break;
}
}while(ch5！ ='0');
Returns FALSE
}
lendbook()
{
FILE *fp，* fp2
int i，n；
int carnum
Printf ("Please enter your card number \ n");
scanf("%d "，& ampcarnum)；
fp=fopen("car.txt "，" r ")；
for(I = 0； Fred (&car [i], sizeof(struct car), 1, fp)! =0; I)
{
If (the car [me]. Card number = = card number)
{
n = I；
fclose(FP)；
Printf ("Please enter the name of the book you want to borrow \ n");
Scanf("%s ",student [n]. lend book)；
fp=fopen("book.txt "，" r ")；
for(I = 0； Fred (& book [i], sizeof (structural book), 1, fp)! =0; I)
{
If(strcmp (book [i]). Book title, student [n]. lendbook)==0)
{
If (book [me]. turefalse==0)
other
fclose(FP)；
fp=fopen("record.txt "，" a ")；
student carnum = carnum
fwrite(& amp； Student [n], sizeof (structural student), 1, FP);
fclose(FP)；
fp=fopen("book.txt "，" r ")；
fp2=fopen("bookl.txt "，" w ")；
for(I = 0； Fred (& book [i], sizeof (structural book), 1, fp)! =0; I)
{
If(strcmp (book [i]). Book title, student [n]. lendbook)==0)
{
Book [me]. ture false = 0；
fwrite(& amp； book[i]，sizeof(struct book)， 1，fp2)；
Continue;
}
fwrite(& amp； book[i]，sizeof(struct book)， 1，fp2)；
}
fclose(FP)；
fclose(fp2)；
fp=fopen("book.txt "，" w ")；
fp2=fopen("bookl.txt "，" r ")；
for(I = 0； Fred (& book [i], sizeof (structural book), 1, fp2)! =0; I)
{
fwrite(& amp； book[i]，sizeof(struct book)， 1，FP)；
}
fclose(FP)；
fclose(fp2)；
fopen("bookl.txt "，" w ")；
fclose(fp2)；
Printf ("Press any key to return after borrowing a book \ n");
getch()；
Return;
}
}
Printf ("There is no such book, press any key to return \ n");
fclose(FP)；
getch()；
Return;
}
}
Printf ("Your card number does not exist, please apply for a new card, and press any key to return \ n");
fclose(FP)；
getch()；
}
Car Count ()
{
FILE * fp
int i，n = 0；
fp=fopen("car.txt "，" r ")；
for(I = 0； Fred (&car [i], sizeof(struct car), 1, fp)! =0; I)
{
Printf ("card %d \ n "，I 1，car [I]。 Carnum，car [I]。 Scientific name, car [me]. );
n = n 1；
}
fclose(FP)；
Printf ("There are %d books in * * * at present \n", n);
Printf ("Press any key \ n");
getch()；
}
Delkar ()
{
FILE *fp，* fp2
int I；
int carnum
Char selection;
fp=fopen("car.txt "，" r ")；
fp2=fopen("bookl.txt "，" w ")；
Printf ("Please enter the card number you want to delete \ n");
Printf ("If the card number you entered exists, the system will automatically delete the information! If it does not exist, the system will not make any changes \ n ");
scanf("%d "，& ampcarnum)；
for(I = 0； Fred (&car [i], sizeof(struct car), 1, fp)! =0; I)
{
If (the car [me]. Kanum. =carnum)
{
fwrite(& amp； car[i]，sizeof(struct car)， 1，fp2)；
}
}
fclose(FP)；
fclose(fp2)；
Printf ("Are you sure you want to delete this card? After deletion, all the information in this book cannot be restored to y/n \ n ");
Scanf("%s ",& select);
if(choice=='y'||choice=='Y ')
{
fp=fopen("car.txt "，" w ")；
fp2=fopen("bookl.txt "，" r ")；
for(I = 0； Fred (&car [i], sizeof (structural car), 1, fp2)! =0; I)
{
fwrite(& amp； car[i]，sizeof(struct car)， 1，FP)；
}
fclose(FP)；
fclose(fp2)；
fp2=fopen("bookl.txt "，" w ")；
fclose(fp2)；
Printf ("Press any key to return \ n");
getch()；
Return;
}
other
{
Printf ("Press any key to return \ n");
getch()；
Return;
}
}
addcar()
{
FILE * fp
int I = 0；
fp=fopen("car.txt "，" a ")；
Printf ("Please enter the card number \ n");
Scanf("%d ",& Auto [me]. carnum)；
Printf ("Please enter student name \ n");
scanf("%s "，car[i].student name)；
Printf ("Please enter a class \ n");
Scanf("%d ",& Auto [me]. );
fwrite(& amp； car[i]，sizeof(struct car)， 1，FP)；
fclose(FP)；
Printf ("After input, any key will be returned \ n");
getch()；
}