public class DemonstrateHumans {
    public static void main(String[] args) {
        HumanBeing hb = new HumanBeing();
        Employee empl = new Employee();
        CollegeProfessor prof = new CollegeProfessor();
        Secretary sec = new Secretary();
        
        HumanBeing[] humans = {hb, empl, prof, sec};
        for (int i = 0; i < humans.length; i++) {
            System.out.println(humans[i]);
            humans[i].eat();
            humans[i].sleep();
            humans[i].speak();
            //humans[i].work();
            System.out.println();
        }
/*
        System.out.println(hb);
        hb.eat();
        hb.sleep();
        hb.speak();
        // hb.work();
        System.out.println();
        
        System.out.println(empl);
        empl.eat();
        empl.sleep();
        empl.speak();
        empl.work();
        System.out.println();

        System.out.println(prof);
        prof.eat();
        prof.sleep();
        prof.speak();
        prof.work();
*/
    }
}