#include

using namespace std;

void doSomething$($int &num$)$

$\{$

$$ num $=$ num $*10$;

$\}$

$$

int main$()$

$\{$

$$ int x $=2$;

$$ cout $<<$ x $<<$ endl;

$$ doSomething$($x$)$;

$$ cout $<<$ x $<<$ endl;

$$ return $0$;

$\}$

$2$

$20$

$20$

$2$

$2$

$2$

$2$

$22$