Please help me with this c program.

this is without the function prototypes.

typedef struct $\{$

char OrderName$[50]$; $//$stores the first name of the customer

int OrderNumber; $//$stores the order number of the customer

double OrderAmount; $//$stores the order amount

char location$[100]$; $//$stores the customer$$s location

char validOrder;$//$stores $\text{'}$V$\text{'}$ for valid or $\text{'}$I$\text{'}$ invalid

$\}$ customer;

int main$()$

$\{$

$//$declare character for the choice

char choice;

$//$declare an array of $50$ customers $($inventory $)$

customer inventory$[50]$;

$//$declare count for the array

count $=0$;

$//$greet the user

$//$fill five customers into the array

$//$set count to $5$

printf$("$

FIVE Valid customers have been added to the inventory.

$")$;

$//$get the choice $-$ initialization

$//$while $($choice $!=\text{'}$Q$\text{'})//$test

$\{$

$//$ProcessMenu$($choice$,$ inventory, &count$)$;

$//$choice $=$ GetChoice$()$; $//$update

$\}$

printf$("$

Have a great day!"$)$;

return $0$;

$\}$

$//(1)$greet the user

$//(2)$fill the inventory with five customers

void FillFive$($customer inventory$[])$

$\{$

customer temp$1=\{$ "Iron.Man", $1,23567843567\mathrm{.}99,$ "Malibu", $\text{'}$V$\text{'}\}$;

inventory$[0]=$ temp$1$;

$//$add $4$ more

$\}$

$//(3)$Display the menu, ask, get, and return the user choice

$//(4)$run the program menu $($process the choice$)$

$//$use if else conditions $($or switch$)$

void ProcessMenu$($char choice, customer inventory$[],$ int$*$ countPtr$)$

$\{$

if $($choice $==\text{'}$A$\text{'})$

$\{$

$//$add customer to list

$//$add one to count

$*$countPtr $=*$countPtr $+1$;

$\}$

else if $($choice $==\text{'}$P$\text{'})$

$\{$

printf$("$

There are $\%$d orders

$",*$countPtr$)$;

$//$declare ask and get the order number

int number;

$//$use a loop to make sure the user enters a valid order number

$//$PrintOneCustomer$($inventory$[$num $-1])$;

$\}$

else if $($choice $==\text{'}$V$\text{'})$

$\{$

$//$call the print valid inventory function

$\}$

else if $($choice $==\text{'}$C$\text{'})$

$\{$

printf$("$Creating a report"$)$;

$//$call print file function

$\}$

else if $($choice $==\text{'}$I$\text{'})$

$\{$

$//$call make invalid function

$\}$

else if $($choice $==\text{'}$E$\text{'})$

$\{$

double amount;

$//$ask and get the amount

$//$loop through the array to display

$\}$

else if $($choice $==\text{'}$T$\text{'})$

$\{$

$//$calculate the total and the average

$\}$

else printf$("$

Not valid"$)$;

$\}$

$//(5)$print ONE customer information onto the screen

void PrintOneCustomer$($customer info$)$

$\{$

printf$("$

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

$")$;

printf$("$

Order number:$\backslash$t$\backslash$t$\%$d$",$ info.OrderNumber$)$;

$//$add the rest

$\}$

$//(6)$print entire VALID customer inventory onto the screen

void PrintValidList$($customer inventory$[],$ int count$)$

$\{$

int i;

for $($i $=0$; i $$ count; i$++)$

$\{$

if $($inventory$[$i$].$validOrder $==\text{'}$V$\text{'})$

$\{$

$//$only print valid orders

$\}$

$\}$

$\}$

$//(7)$print entire customer inventory$($valid and invalid$)$ into a file

void PrintListToFile$($customer inventory$[],$ int count$)$

$\{$

FILE$*$ outPtr;

outPtr $=$ fopen$("$report$.$txt$","$w$")$;

int i;

for $($i $=0$; i $$ count; i$++)$

$\{$

fprintf$($outPtr$,"$

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

$")$;

fprintf$($outPtr$,"$

Order number:$\backslash$t$\backslash$t$\%$d$",$ inventory$[$i$].$OrderNumber$)$;

$//$add the rest

$\}$

fclose$($outPtr$)$;

$\}$

$//(8)$Add a new customer into the inventory

void AddCustomerToList$($customer inventory$[],$ int count$)$

$\{$

$//$set the oder number based on the count

inventory$[$count$].$OrderNumber $=$ count $+1$;

$//$get the name

printf$("$Please enter the name of the order: $")$;

scanf$("\%$s$",$ inventory$[$count$].$OrderName$)$;

$//$add the additional prompts and scanf statements

$//$set the order as valid

inventory$[$count$].$validOrder $=\text{'}$V$\text{'}$;

$\}$

$//(9)$make a customer invalid

void MakeInvalid$($customer inventory$[],$ int count$)$

$\{$

printf$("$

There are $\%$d orders

$",$ count$)$;

$//$declare ask and get the order number

int number;

$//$use a loop to make sure the user enters a valid order number

$//$inventory$[$number $-1].$validOrder $=\text{'}$I$\text{'}$;

$//$order number is one greater than the index, examples:

$//$index is $0-$ order number is $1$

$//$inedx is $1-$ order number is $2$

$\}$

$//(10)$ Calculate the total and the average of all the valid orders

void CalculateTotalAverage$($customer inventory$[],$ int count$)$

$\{$

int i$,$ totalCount $=0$;

double sum $=0\mathrm{.}0,$ avg;

$//$loop through the array to add up all the amounts that are valid

$//$be sure to keep a total count for the average

$\}$