Which option best describes the main$()$ program, assuming the class member functions are implemented correctly, but not shown below?

class Month

$\{$

public:

int get$\_$Month$\_$num$()$ const;

string get$\_$Month$()$ const;

Month$($int$)$;

private:

int mon;

$\}$;

void main$()$

$\{$

Month m$(3)$;

cout $<<$ get$\_$Month$()<<"$ is #$"<<$ get$\_$Month$\_$num$()<<$ endl;

m$.$Month$(4)$;

cout $<<$ get$\_$Month$()<<"$ is #$"<<$ get$\_$Month$\_$num$()<<$ endl;

$\}$