public class Hitung {
    public double hitungSalary(Employee e) {
        return e.salary;
    }
//Polymorphic Arguments : TestPolyArg.java
    public class TestPolyArg {
        public static void main(String[ ] args) {
            Employee p1 = new Employee();
            Manager p2 = new Manager();
            Hitung p3 = new Hitung();
            System.out.println("Salary p1 : " + p3.hitungSalary(p1));
            System.out.println("Salary p2 : " + p3.hitungSalary(p2));
    }