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Suppose we already have the following Topping class to represent a type of food that might go on top of a pizza.
public class Topping { public static final Topping PEPPERONI = new Topping(true); public static final Topping SAUSAGE = new Topping(true); public static final Topping ONION = new Topping(false); public static final Topping GREEN_PEPPER = new Topping(false); public static final Topping BLACK_OLIVE = new Topping(false); private boolean is_meat; private Topping(boolean in_is_meat) { is_meat = in_is_meat; } public boolean isVegetarian() { return !is_meat; } }
import csbsju.cs160.*; public class PizzaTest { public static void main(String[] args) { Pizza p = new Pizza(); p.addTopping(Topping.ONION); IO.println(p.isVegetarian()); // prints ``true'' p.addTopping(Topping.GREEN_PEPPER); IO.println(p.isVegetarian()); // prints ``true'' p.addTopping(Topping.PEPPERONI); IO.println(p.isVegetarian()); // prints ``false'' p.addTopping(Topping.BLACK_OLIVE); IO.println(p.isVegetarian()); // prints ``false'' } }
Write a Point class to represent a point in two-dimensional Cartesian space. The point class should support the following methods.
import csbsju.cs160.*; public class PointTest { public static void main(String[] args) { Point origin = new Point(); Point pt = new Point(3, 4); IO.println(pt.distanceTo(origin)); // prints ``5.0'' pt.translate(2, 8); IO.println(pt.distanceTo(origin)); // prints ``13.0'' } }
In CSCI 160, there are two types of grades: quiz grades (out of 30) and regular grades. The lowest quiz grade is dropped in computing a student's total score. For example, if a student scored 30/35 and 24/35 on two labs and 20/30, 15/30, and 30/30 on three quizzes, the student's total score would be (30 + 24 + 20 + 30) / (35 + 35 + 30 + 30) = 104 / 130 = 80%, since the lowest score is dropped.
import csbsju.cs160.*; public class StudentTest { public static void main(String[] args) { Student stud = new Student(); stud.addRegularScore(30, 35); stud.addRegularScore(24, 35); stud.addQuizScore(20); stud.addQuizScore(15); stud.addQuizScore(30); IO.println(100.0 * stud.getTotal() + "%"); // prints ``80.0%'' } }