My code has a problem where it validates the postal code before the user inputs data thus resulting in the error message triggering it should be just as the corrected output i need some help please. this is coded in C

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

#include

#include

#include

#include

struct Customer $\{$

char first$\_$name$[50]$;

char last$\_$name$[50]$;

char street$\_$address$[100]$;

char city$[50]$;

char province$[3]$;

char postal$\_$code$[8]$;

$\}$;

int isValidPostalCode$($char postal$\_$code$[7])$;

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

struct Customer customer;

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

fgets$($customer$.$first$\_$name, sizeof$($customer$.$first$\_$name$),$ stdin$)$;

customer.first$\_$name$[$strcspn$($customer$.$first$\_$name, $"$

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

while $(1)\{$

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

fgets$($customer$.$last$\_$name, sizeof$($customer$.$last$\_$name$),$ stdin$)$;

customer.last$\_$name$[$strcspn$($customer$.$last$\_$name, $"$

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

if $($strlen$($customer$.$last$\_$name$)>0)\{$

break;

$\}$ else $\{$

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

$\}$

$\}$

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

fgets$($customer$.$street$\_$address, sizeof$($customer$.$street$\_$address$),$ stdin$)$;

customer.street$\_$address$[$strcspn$($customer$.$street$\_$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, $"$

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

while $(1)\{$

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

fgets$($customer$.$postal$\_$code, sizeof$($customer$.$postal$\_$code$),$ stdin$)$;

customer.postal$\_$code$[$strcspn$($customer$.$postal$\_$code, $"$

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

if $($isValidPostalCode$($customer$.$postal$\_$code$))\{$

break;

$\}$ else $\{$

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

$\}$

$\}$

return customer;

$\}$

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

int i;

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

postal$\_$code$[$i$]=$ toupper$($postal$\_$code$[$i$])$;

$\}$

if $($isalpha$($postal$\_$code$[0])$ && isdigit$($postal$\_$code$[1])$ && isalpha$($postal$\_$code$[2])$ &&

postal$\_$code$[3]==\text{'}\text{'}$ &&

isdigit$($postal$\_$code$[4])$ && isalpha$($postal$\_$code$[5])$ &&

strlen$($postal$\_$code$)==7)\{$

return $1$;

$\}$ else $\{$

return $0$;

$\}$

$\}$

int main$($void$)\{$

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

printf$("$

You entered:

$\%$s $\%$s

$\%$s$,$

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

$\%$s

$",$

customer.first$\_$name, customer.last$\_$name,

customer.street$\_$address,

customer.city, customer.province,

customer.postal$\_$code$)$;

return $0$;

$\}$

My Output

Enter your first name: John

Enter your last name:

Invalid Entry: Enter your last name: Smith

Enter your street address: $25$ Elm St$.$

Enter your city: Toronto

Enter your province: ON

Enter your postal code: Invalid Entry: Enter your postal code: m$2$e$44$x

Invalid Entry: Enter your postal code: m$2$e $4$x$4$

You entered:

John Smith

$25$ Elm St$.,$

Toronto, ON$,$

M$2$E $4$X$4$

Program ended with exit code: $0$

Corrected Output

Enter your first name: John

Enter your last name:

Invalid Entry: Enter your last name: Smith

Enter your street address: $25$ Elm St$.$

Enter your city: Toronto

Enter your province: ON

Enter your postal code: m$2$e$44$x

Invalid Entry: Enter your postal code: m$2$e $4$x$4$

You entered:

John Smith

$25$ Elm St$.,$

Toronto, ON$,$

M$2$E $4$X$4$