package Lecture12;

class Student {
    public Student(String fName, String lName)
    { firstName= fName; lastName= lName;}
    public void printData()
    { System.out.println(firstName + " " + lastName);}
    private String firstName;
    private String lastName;
}

class Undergrad extends Student {
    public Undergrad(String fName, String lName, 
                     double rate, double hours) { 
        super(fName, lName); 
        UnderWage= rate; 
        UnderHours= hours; }
    public double getPay() {
        return UnderWage * UnderHours; }
    public void printData() {
        super.printData();
        System.out.println("Paga semanal: $" + UnderWage * UnderHours); }
    private double UnderWage;
    private double UnderHours; 
}

class Grad extends Student {
    public Grad(String fName, String lName, double salary) {
        super(fName, lName);
        GradSalary= salary; }
    public double getPay() {
        return GradSalary; }
    public void printData() {
        super.printData();
        System.out.println("Salario mensual: $" + GradSalary); }
    private double GradSalary;
}
        
class SpecGrad extends Grad {
    public SpecGrad(String fName, String lName, double stipend) {
        super(fName, lName, 0.0);         // Zero salary              
        SpecStipend= stipend; }
    public double getPay() {
	return SpecStipend; }
    public void printData() {
	super.printData();
        System.out.println("Remuneración semestral: $" + getPay()); }
        // ˇEs peligroso! Si se define una subclase, ésta invocará a su propio getPay.
    private double SpecStipend;
}

public class Student2 {
    public static void main(String[] args) {
	Undergrad Ferd= new Undergrad("Ferd", "Smith", 12.00, 8.0);
	Ferd.printData();
	Grad Ann= new Grad("Ann", "Brown", 1500.00);
	Ann.printData();
	SpecGrad Mary= new SpecGrad("Mary", "Barrett", 2000.00);
	Mary.printData();
        System.out.println("\n");
        
        Student[] team= new Student[3];
        team[0]= Ferd;
        team[1]= Ann;
        team[2]= Mary;
        for (int i=0; i < 3; i++)
            team[i].printData();
    }
}