Q$2$: What is the output of the following $C++$ statements?

$C++$ statements

void Fexam$($int & v$1,$ int v$2)$

$(v1++$;

if $)==(4$ cout $v_1+v_2$ end $1$ ;

else if $)==(4$ cout $v1$ end$1$;

else cout $v_2$ endl; $\}$

void main$()$

int $n=10,a=1$;

Fexam $(a,n)$;

cout $++a$ end $1$; $\}$