I$\text{'}$m trying to run some test cases as you can see below for my isValidPostalCode function but for some reason it keeps failing with the code C$0000005$ I need some help figuring this out to help get my test to pass. its telling me that the problem is within my isValidPostalCode function particularly this line of code postalCode$[$i$]=$ toupper$($postalCode$[$i$])$ so I need some help to figure it out.

#define $\_$CRT$\_$SECURE$\_$NO$\_$WARNINGS

#include

#include

#include

#include

#include "customer.h$"$

struct Customer getCustomerInfo$($void$)\{$

struct Customer customer;

printf$("$Enter your first name: $")$;

fgets$($customer$.$firstName, sizeof$($customer$.$firstName$),$ stdin$)$;

customer.firstName$[$strcspn$($customer$.$firstName, $"$

$")]=\text{'}\backslash 0\text{'}$;

while $(1)\{$

printf$("$Enter your last name: $")$;

fgets$($customer$.$lastName, sizeof$($customer$.$lastName$),$ stdin$)$;

customer.lastName$[$strcspn$($customer$.$lastName, $"$

$")]=\text{'}\backslash 0\text{'}$;

if $($strlen$($customer$.$lastName$)>0)\{$

break;

$\}$

else $\{$

printf$("$Invalid Entry: $")$;

$\}$

$\}$

printf$("$Enter your street address: $")$;

fgets$($customer$.$address, sizeof$($customer$.$address$),$ stdin$)$;

customer.address$[$strcspn$($customer$.$address, $"$

$")]=\text{'}\backslash 0\text{'}$;

printf$("$Enter your city: $")$;

fgets$($customer$.$city, sizeof$($customer$.$city$),$ stdin$)$;

customer.city$[$strcspn$($customer$.$city, $"$

$")]=\text{'}\backslash 0\text{'}$;

printf$("$Enter your province: $")$;

fgets$($customer$.$province, sizeof$($customer$.$province$),$ stdin$)$;

customer.province$[$strcspn$($customer$.$province, $"$

$")]=\text{'}\backslash 0\text{'}$;

int c;

while $(($c $=$ getchar$())!=\text{'}$

$\text{'}$ && c $!=$ EOF$)$;

while $(1)\{$

printf$("$Enter your postal code: $")$;

fgets$($customer$.$postalCode, sizeof$($customer$.$postalCode$),$ stdin$)$;

customer.postalCode$[$strcspn$($customer$.$postalCode, $"$

$")]=\text{'}\backslash 0\text{'}$;

if $($isValidPostalCode$($customer$.$postalCode$))\{$

break;

$\}$

else $\{$

printf$("$Invalid Entry: $")$;

$\}$

$\}$

return customer;

$\}$

int isValidPostalCode$($char postalCode$[8])\{$

int i;

for $($i $=0$; i $<6$; i$++)\{$

postalCode$[$i$]=$ toupper$($postalCode$[$i$])$;

$\}$

if $($isalpha$($postalCode$[0])$ && isdigit$($postalCode$[1])$ && isalpha$($postalCode$[2])$ &&

postalCode$[3]==\text{'}\text{'}$ &&

isdigit$($postalCode$[4])$ && isalpha$($postalCode$[5])$ &&

strlen$($postalCode$)==7)\{$

return $1$;

$\}$

else $\{$

return $0$;

$\}$

$\}$

int main$($void$)\{$

struct Customer customer $=$ getCustomerInfo$()$;

printf$("$

You entered:

$\%$s $\%$s

$\%$s$,$

$\%$s$,\%$s$,$

$\%$s

$",$

customer.firstName, customer.lastName,

customer.address,

customer.city, customer.province,

customer.postalCode$)$;

return $0$;

$\}$

#pragma once

#ifndef CUSTOMER$\_$H

#define CUSTOMER$\_$H

struct Customer $\{$

char firstName$[50]$;

char lastName$[50]$;

char address$[100]$;

char city$[50]$;

char province$[3]$;

char postalCode$[8]$;

$\}$;

int isValidPostalCode$($char postal$\_$code$[8])$;

struct Customer getCustomerInfo$($void$)$;

#endif

#include $"$pch$.$h$"$

#include "CppUnitTest.h$"$

#include "CustomerTest$\_$r$.$h$"$

using namespace Microsoft::VisualStudio::CppUnitTestFramework;

TEST$\_$CLASS$($CustomerInfoTest$\_$Blackbox$)$

$\{$

public:

TEST$\_$METHOD$($BlackBox$\_$ValidPostalCode$)$

$\{$

Assert::IsTrue$($isValidPostalCode$("$K$1$M $2$G$9"))$;

$\}$

TEST$\_$METHOD$($BlackBox$\_$InvalidLength$)$

$\{$

Assert::IsFalse$($isValidPostalCode$("$A$1$B $2$R$4$X$"))$;

$\}$

TEST$\_$METHOD$($BlackBox$\_$ExtraSpace$)$

$\{$

Assert::IsFalse$($isValidPostalCode$("$A$1$B $2$R$4"))$;

$\}$

TEST$\_$METHOD$($BlackBox$\_$MissingSpace$)$

$\{$

Assert::IsFalse$($isValidPostalCode$("$A$1$B$2$R$4"))$;

$\}$

TEST$\_$METHOD$($BlackBox$\_$AlphanumericCharacters$)$

$\{$

Assert::IsFalse$($isValidPostalCode$("$A$1$B $2$R$4$X$"))$;

$\}$

TEST$\_$METHOD$($BlackBox$\_$SpecialCharacters$)$

$\{$

Assert::IsFalse$($isValidPostalCode$("$A$1$B $2$R$4$#$"))$;

$\}$

$\}$;

TEST$\_$CLASS$($CustomerInfoTest$\_$Whitebox$)$

$\{$

public:

TEST$\_$METHOD$($WhiteBox$\_$UppercaseConversion$)$

$\{$

Assert::IsTrue$($isValidPostalCode$("$a$1$b $2$r$4"))$;

$\}$

TEST$\_$METHOD$($WhiteBox$\_$EmptyString$)$

$\{$

Assert::IsFalse$($isValidPostalCode$(""))$;

$\}$

TEST$\_$METHOD$($WhiteBox$\_$NullPointer$)$

$\{$

Assert::IsFalse$($isValidPostalCode$($nullptr$))$;

$\}$

TEST$\_$METHOD$($WhiteBox$\_$IndividualChecks$\_$NumericOnly$)$

$\{$

Assert::IsFalse$($isValidPostalCode$("123456"))$;

$\}$

TEST$\_$METHOD$($WhiteBox$\_$IndividualChecks$\_$AlphabeticOnly$)$

$\{$

Assert::IsFalse$($isValidPostalCode$("$ABC DEF"$))$;

$\}$

TEST$\_$METHOD$($WhiteBox$\_$IndividualChecks$\_$SpaceOnly$)$

$\{$

Assert::IsFalse$($isValidPostalCode$(""))$;

$\}$

TEST$\_$METHOD$($WhiteBox$\_$LongInvalidPostalCode$)$

$\{$

Assert::IsFalse$($isValidPostalCode$("$M$1$A $1$A$1$X$123"))$;

$\}$

TEST$\_$METHOD$($WhiteBox$\_$CaseSensitivity$\_$Uppercase$)$

$\{$

Assert::IsTrue$($isValidPostalCode$("$a$1$b $2$r$4"))$;

$\}$

TEST$\_$METHOD$($WhiteBox$\_$CaseSensitivity$\_$Lowercase$)$

$\{$

Assert::IsTrue$($isValidPostalCode$("$A$1$B $2$R$4"))$;

$\}$

$\}$;