Modify the C program is split into two source files and one header file. In this project, you are allowed to modify all parts of the program.

Put all functions related to operations on the list of guests into volunteer.c

Create a header file named volunteer.h that contains struct volunteer declaration and prototypes for the functions in volunteer.c$.$ The header file should enclose the contents of the header file in an #ifndef$-$#endif pair to protect the file.

Put read$\_$line function in read$\_$line.c

Create a header file named read$\_$line.h that contains function prototype for read$\_$line function. The header file should enclose the contents of the header file in an #ifndef$-$#endif pair to protect the file.

#include

#include

#include

#define MaxClrLength $100$

#define InputFileName "supply.csv$"$

#define OutputFileName "result.csv$"$

#define MaxSupplyItems $200$

#define MaxNameLength $100$

struct supply $\{//$ struct to hold information

char name$[$MaxNameLength$]$;

char color$[$MaxClrLength$]$;

int quantity;

$\}$;

int compare$($const void $*$a$,$ const void $*$b$)\{$

const struct supply $*$supply$\_$a $=($const struct supply $*)$a;

const struct supply $*$supply$\_$b $=($const struct supply $*)$b;

int name$\_$cmp $=$ strcmp$($supply$\_$a$->$name, supply$\_$b$->$name$)$; $//$ compare name

if $($name$\_$cmp $!=0)\{$

return name$\_$cmp;

$\}$

return strcmp$($supply$\_$a$->$color, supply$\_$b$->$color$)$; $//$ compare by color if names are the same

$\}$

int read$\_$line$($FILE $*$file$,$ struct supply supplies$[])\{//$ read line function

int count $=0$;

while $($fscanf$($file$,"\%[^,],\%[^$

$],\%$d

$",$ supplies$[$count$].$name, supplies$[$count$].$color, &supplies$[$count$].$quantity$)==3)\{$

count$++$; $//$ reads line until eof and increment count

$\}$

return count; $//$ Return total # of supplies

$\}$

void WriteResult$($struct supply result$[],$ int n$)\{//$ Function to write search results to an output file

FILE $*$file $=$ fopen$($OutputFileName$,"$w$")$; $//$ File in write mode

if $($file $==$ NULL$)\{$

printf$("$Error opening file.

$")$; $//$ Error message if fails to open

return;

$\}$

for $($int i $=0$; i $<$ n; i$++)\{//$ Write supply info to output file

fprintf$($file$,"\%$s$,\%$s$,\%$d

$",$ result$[$i$].$name, result$[$i$].$color, result$[$i$].$quantity$)$;

$\}$

fclose$($file$)$; $//$ Close the output file

$\}$

int main$()\{$

struct supply supplies$[$MaxSupplyItems$]$; $//$ Array to store supplies from the input file

FILE $*$file $=$ fopen$($InputFileName$,"$r$")$; $//$ Open input file in read mode

if $($file $==$ NULL$)\{$

printf$("$Error opening file.

$")$; $//$ Error message if file opening fails

return $1$;

$\}$

int NumSupplies $=$ read$\_$line$($file$,$ supplies$)$; $//$ Looks up supply information from the input file

fclose$($file$)$;

qsort$($supplies$,$ NumSupplies, sizeof$($struct supply$),$ compare$)$; $//$ Sort supplies using quicksort

WriteResult$($supplies$,$ NumSupplies$)$; $//$ Write sorted supplies to the output file

return $0$;

$\}$