Inheritance menggantikan If-Else

class Member {
public: virtual void reward() { printf ("Batas peminjaman minimal 24 jam\n"); }
}

class MemberA : public Member {
public: void reward() { printf("perpanjangan minimal +1 jam"); }
}

class MemberB : public Member {
public: void reward() { printf("perpanjangan minimal +2 jam"); }
}

void hitung(Member member)
{
    // entah gimana rumusnya
    member.reward();            // mau pakai apapun, dia akan pakai method yang sama, minimalisasi adanya if-else
}

int main()
{
    MemberA PakSatria;

    hitung(PakSatria);
}