I am trying to take a C programming program and add functions to it$,$ this is the original working program

$/*$ THIS PROGRAM DOES NOT USE FUNCTIONS; THE TASK IS TO RE$-$WRITE IT USING FUNCTIONS $*/$

$/*$Markup$.$c by CIS $1852024$

Input: Keyboard

Output: Screen

This program calculates markup price of an inventory item. Items are marked up by $44\%.$

An item count and grand total of the marked up values is accumulated and printed at the end

of the program. This program will include separate functions for: heading, inputs,

processing and outputs after it is restructured using functions.

$*/$

#include

int main $($void$)\{$

$/*$ Declaration $*/$

int itemNo$=0,$ itemCount$=0$;

float cost$=0\mathrm{.}0$f$,$ markedup$=0\mathrm{.}0$f$,$ grandTotal $=0\mathrm{.}0$f;

char again $=\text{'}$Y$\text{'}$;

$/*$ Heading $*/$

printf$("$Markup Calculator by You

$")$;

$/*$ Begin Loop $*/$

while $($again $==\text{'}$Y$\text{'}||$ again $==\text{'}$y$\text{'})\{$

$/*$ Input Section $*/$

do $\{$

$/*$ Validate entry $*/$

printf$("$

Enter Item Number $(101-999)")$;

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

if $($itemNo $<101||$ itemNo $>999)\{$

printf$("$Item Number not accepted, enter an Item Number $101-999$

$")$;

$\}$

$\}$ while $($itemNo $<101||$ itemNo $>999)$;

printf$("$Enter the cost of the inventory item $")$;

scanf$("\%$f$",$ &cost$)$;

$/*$ Processing Section $*/$

markedup $=$ cost $*1\mathrm{.}44$f; $//$calculate markup

$/*$ Accumulate count, total and loop $*/$

itemCount$++$;

grandTotal $+=$ markedup;

$/*$ Output Section $*/$

printf$("$

The unit cost for item $\%$d is $\%\mathrm{.}2$f

$",$ itemNo, cost$)$;

printf$("$The marked up sales amount is $\%\mathrm{.}2$f

$",$ markedup$)$;

$/*$ Prompt user to determine if loop should continue $*/$

printf$("$Enter another item? Enter Y or N $")$;

scanf $("\%$c$",$ &again$)$; $//$ note the space in the conversion specifier

$\}/*$End Loop $*/$

$/*$ Print count, final total $*/$

printf$("$

Item Count: $\%$d

$",$ itemCount$)$;

printf$("$

Grand Total of all marked up items: $$\%\mathrm{.}2$f

$",$ grandTotal$)$;

$/*$ End program $*/$

return $0$;

$\}$

This is my attempt to add functions to it$,$ would someone please help me$?$

$/*$ THIS PROGRAM DOES NOT USE FUNCTIONS; THE TASK IS TO RE$-$WRITE IT USING FUNCTIONS $*/$

$/*$Markup$.$c by CIS $1852024$

Input: Keyboard

Output: Screen

This program calculates markup price of an inventory item. Items are marked up by $44\%.$

An item count and grand total of the marked up values is accumulated and printed at the end

of the program. This program will include separate functions for: heading, inputs,

processing and outputs after it is restructured using functions.

$*/$

#include

$//$ Prints Heading$/$Welcome Message

void printHeading$($void$)$;

$//$ Gets item number from user

int Number$($void$)$;

$//$Gets item cost from user

float Cost$($void$)$;

$/*$Processing and calculating markup for a single item$*/$

float outputMarkup$($float$)$;

$//$ Printing markup cost for a single item

void printmarkup$($float $)$;

int main $($void$)\{$

$/*$ Declaration $*/$

int itemNo$=0,$ itemCount$=0$;

float cost$=0\mathrm{.}0$f$,$ markedup$=0\mathrm{.}0$f$,$ grandTotal $=0\mathrm{.}0$f;

char again $=\text{'}$Y$\text{'}$;

$//$ Heading$/$Welcome Message

printHeading$()$;

$/*$ Begin Loop $*/$

while $($again $==\text{'}$Y$\text{'}||$ again $==\text{'}$y$\text{'})\{$

$//$ get item number

itemNo $=$ Number$()$;

$//$get item cost

cost $=$ Cost$()$;

$//$ get markedup

markedup $=$ outputMarkup$($cost$)$;

$//$ accumulate grand total and count

itemCount$++$;

grandTotal $+=$ markedup;

$//****$ print markup

printmarkup$($markedup$)$;

$/*$ Prompt user to determine if loop should continue $*/$

printf$("$Enter another item? Enter Y or N $")$;

scanf $("\%$c$",$ &again$)$; $//$ note the space in the conversion specifier

$\}$

$/*$ Print count, final total $*/$

$//$printf$("$

$------------------$

$")$;

printf$("$

Item Count: $\%$d

$",$ itemCount$)$;

printf$("$

Grand Total of all marked up items: $$\%\mathrm{.}2$f

$",$ grandTotal$)$;

$/*$ Heading $*/$

printf$("$Markup Calculator by You

$")$;

$/*$ End program $*/$

return $0$;

$\}$

$//$ Definitions

$//$Print heading welcome message

void printHeading$($void$)\{$

$//$ display heading

printf$("$Markup Calculator by Sarah Place

$")$;

$\}$

$/*$ Input Section $*/$

$/*$Getting the item number from the user$*/$

int Number$($void$)\{$

int itemNo;

do $\{$

$/*$ Validate entry $*/$

printf$("$

Enter Item Number $(101-999)")$;

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

if $($itemNo $<101||$ itemNo $>999)\{$

printf$("$Item Number not accepted, enter an Item Number $101-999$

$")$;

$\}$

$\}$ while $($itemNo $<101||$ itemNo $>999)$;

return itemNo;

$\}$

$//$Getting cost of inventory item

float Cost$($void$)\{$

float cost$=0\mathrm{.}0$f;

printf$("$Enter the cost of the inventory item $")$;

scanf$("\%$f$",$ &cost$)$;

return cost;

$\}$

$/*$ Processing Section $*/$

float outputMarkup $=($float Cost$)$

$\{$

float markup$=0\mathrm{.}0$f;

markup $=$ cost $*1\mathrm{.}44$f;

return outputMarkup;

$\}$

$/*$ Output Section $*/$

printf$("$

The unit cost for item $\%$d is $\%\mathrm{.}2$f

$",$ itemNo, cost$)$;

printf$("$The marked up sales amount is $\%\mathrm{.}2$f

$",$ markedup$)$;

$\}/*$End Loop $*/$