Sample run $2$:

Books:

id: $1$

name: Let$\_$Us$\_$C

author: Y$.$Kanetkar

quantity: $11$

rackno: $3$

id: $2$

name: Head$\_$First$\_$C

author: D$.$Griffiths

quantity: $10$

rackno: $45$

id: $6$

name: C$\_$Prog

author: C$.$Brown

quantity: $45$

rackno: $6$

Enter id of the book to be updated:

$6$

How many books will be added$(+)$ or removed$(-)$:

$5$

Books:

id: $1$

name: Let$\_$Us$\_$C

author: Y$.$Kanetkar

quantity: $11$

rackno: $3$

id: $2$

name: Head$\_$First$\_$C

author: D$.$Griffiths

quantity: $10$

rackno: $45$

id: $6$

name: C$\_$Prog

author: C$.$Brown

quantity: $50$

rackno: $6$

Enter id of the book to be deleted:

$2$

Books:

id: $1$

name: Let$\_$Us$\_$C

author: Y$.$Kanetkar

quantity: $11$

rackno: $3$

id: $6$

name: C$\_$Prog

author: C$.$Brown

quantity: $50$

rackno: I have a C Programming assaignment. We have to complete a code structure. I will put the required sample run for the code. Also, there is a binary file library.bin which contains records of books in a library. Each book record will be stored using bookData struct. I will also put the library.bin file. Assaignment Description: You are given a binary file library.bin $($you can download from Moodle$)$ which contains records of books in a library. Each book record will be stored using bookData struct.

typedef struct

$\{$

int id; $//$ book id

char name$[20]$; $//$ book name

char author$[20]$; $//$ author of book

int quantity; $//$ quantity of book

int rackno; $//$ rack no of the book

$\}$ bookData;

Library.bin file consists of $100$ records. $96$ of them are blank records. The other $3$ records $($not blank$)$ are placed in specific positions of the binary file based on their ids. For example, if id of the book is $5,$ its record is the fifth record in the file. The size of each record is equal to the size of bookData struct. The records are sorted according to their id number.

Implement the following functions:

void showRecords$()-$ It shows and lists all records in the binary file.

int updateRecord$($int id$,$ int diff$)-$ This function updates quantity of the book whose id is provided in the parameter id$.$ The update is performed by adding the number in the parameter diff to the quantity of the book with the given id$.$ If there is a book record with the given id$,$ the new quantity of the book is written to library.bin and the function returns $1$; otherwise, it returns $0.$

int deleteRecord$($int id$)-$ This function removes the book with the given id from binary file $($library$.$bin$)$ by setting its fields to $\{0,"","",0,0\}.$ If the given id is found in the binary file, the book record will be removed from the binary file and the function returns $1$; otherwise, it returns $0.$ A skeleton code $($HW$3\_$skeleton.c$)$ provided in Moodle. Note that, in each function, you should open library.bin,

perform your task, and close the file. In showRecords fuction, open the file with $$rb$,$ in updateRecord and deleteRecord function open the file with $$rb$+.$

Hint: fseek$()$ is used to move file pointer associated with a given file to a specific position. You need to use fseek $()$ function to add, update and delete any record in binary file. Here is the code structure that needs to be complete: #include

#include

typedef struct

$\{$

int id; $//$ book id

char name$[20]$; $//$ book name

char author$[20]$; $//$ author of book

int quantity; $//$ quantity of book

int rackno; $//$ rack no of the book

$\}$ bookData;

void showRecords$()$;

int updateRecord$($int id$,$ int diff$)$;

int deleteRecord$($int id$)$;

int main$()$

$\{$

int id;

int diff;

printf$("$Books:$")$;

showRecords$()$;

printf$("$Enter id of the book to be updated:"$)$;

scanf$("\%$d$",$&id$)$;

printf$("$How many books will be added$(+)$ or removed$(-)$:$")$;

scanf$("\%$d$",$&diff$)$;

if $($updateRecord$($id$,$ diff$)==0)$

printf$("$There is no book with id $\%$d$",$id$)$;

printf$("$Books:$")$;

showRecords$()$;

printf$("$Enter id of the book to be deleted:"$)$;

scanf$("\%$d$",$&id$)$;

if $($deleteRecord$($id$)==0)$

printf$("$There is no book with id $\%$d$".,$id$)$;

printf$("$Books:$")$;

showRecords$()$;

return $0$;

$\}$

void showRecords$()$

$\{$

$//$ implement here

$\}$

int updateRecord$($int id$,$ int diff$)$

$\{$

$//$ implement here

$\}$

int deleteRecord$($int id$)$

$\{$

$//$ implement here

$\}$