$[6\mathrm{.}3.$b$]$ What is the output of the following code?

void func$($int para$)$

i

$+$tpara;

I

int main$()$

$1$

int num $=5$;

func $($num$)$ ;

cout $$ num;

$\}$

Syntax error

Run$-$time error

$6$