$$ Show the execution result with the reason briefly.

int func$($int a$)$

$\{$

a$++$; $/*$ Does this variable affect the main function? $*/$

return a;

$\}$

int main$()$

$\{$

int t$,$ v $=1$;$$

t $=$ func$($v$)$;

printf$(\%$d$$n$,$ v$+$t$)$;

return $0$;

$\}$