please check whether there is error in the following c$++$ code:

using namespace std;

bool isPrime$($int n$)\{$

if $($n $<=1)$ return false; $//$ Numbers less than or equal to $1$ are not prime

if $($n $==2||$ n $==3)$ return true; $//2$ and $3$ are prime numbers

if $($n $\%2==0||$ n $\%3==0)$ return false; $//$ Any number divisible by $2$ or $3$ is not prime

$//$ Check for factors from $5$ to $$n

for $($int i $=5$; i $*$ i $<=$ n; i $+=6)\{$

if $($n $\%$ i $==0||$ n $\%($i $+2)==0)$ return false;

$\}$

return true;

$\}$

void findPrimePair$($int n$)\{$

if $($n $\%2!=0)\{$

cout $<<$ n $<<"$ is not an even number" $<<$ endl;

return;

$\}$

bool found $=$ false;

for $($int i $=2$; i $<=$ n $/2$; $++$i$)\{$

if $($isPrime$($i$)$ && isPrime$($n $-$ i$))\{$

cout $<<$ n $<<"="<<$ i $<<"+"<<($n $-$ i$)<<$ endl;

found $=$ true;

$\}$

$\}$

if $(!$found$)\{$

cout $<<"$No prime pairs found for $"<<$ n $<<$ endl;

$\}$

$\}$

void findPrimePairInRange$($int lower, int upper$)\{$

for $($int n $=$ lower; n $<=$ upper; $++$n$)\{$

if $($n $\%2!=0)$ continue; $//$ Skip odd numbers

vector$>$ pairs;

for $($int i $=2$; i $<=$ n $/2$; $++$i$)\{$

if $($isPrime$($i$)$ && isPrime$($n $-$ i$))\{$

pairs.push$\_$back$(\{$i$,$ n $-$ i$\})$;

$\}$

$\}$

if $($pairs$.$size$()>=2)\{$

cout $<<$ n $<<""$;

$\}$

$\}$

cout $<<$ endl;

$\}$

void findEvenNumbers$($string path$)\{$

cout $<<$ "Reading prime number from $"<<$ path $<<$ endl;

ifstream fin$($path$)$;

int prime;

fin $>>$ prime;

cout $<<$ "Prime number: $"<<$ prime $<<$ endl;

for $($int n $=2$; n $<=100$; n $+=2)\{$

if $($isPrime$($n $-$ prime$)$ && $($n $-$ prime$)!=$ prime$)\{$

cout $<<$ n $<<""$;

$\}$

$\}$

cout $<<$ endl;

fin.close$()$;

$\}$