What is the output of the following code?

void my$\_$recursive$\_$function$($int n$)$

$\{$

if$($n $==0)$

return;

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

my$\_$recursive$\_$function$($n$-1)$;

$\}$

int main$()$

$\{$

my$\_$recursive$\_$function$(10)$;

return $0$;

$\}$