Starting out with Visual C# (4th Edition)
4th Edition
ISBN: 9780134382609
Author: Tony Gaddis
Publisher: PEARSON
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Textbook Question
Chapter 10, Problem 2AW
Look at the following class declarations:
class Plant
{
public virtual void Message()
{
MessageBox.Show("I'm a plant.");
}
}
class Tree : Plant
{
public override void Message()
{
MessageBox.Show("I'm a tree.");
}
}
Given these class definitions, what will the following code display?
Plant p = new Tree();
p.Message();
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Look at the following class declarations: class Plant { public virtual void Message() { MessageBox.Show("I'm a plant."); } } class Tree : Plant { public override void Message() { MessageBox.Show("I'm a tree."); } } Given these class definitions, what will the following code display? Plant p = new Tree(); p.Message();
public class StairViewer
public static void main(String(] args)
// Step 2: Create a rectangle and draw it as the
//
top step of the stair
// location: (20, 10)
// size: (20, 20)
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// Step 3: Create a rectangle and draw it as the
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middle step of the stair
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// location: below the top step, aligned on left
// size: (40, 20)
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// Step 4: Create a rectangle and draw it as the
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bottom step of the stair
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// location: below the middle step, aligned on left
// size: (60, 20)
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}
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Question 13
What is outpout?
public class Vehicle {
public void drive(){
System.out.println("Driving vehicle");
}
}
public class Plane extends Vehicle {
@Override
public void drive(){
System.out.println("Flying plane");
}
public static void main(String args[]) {
Vehicle myVehicle= = new Plane();
myVehicle.drive();
}
Driving vehicle
syntax error
Flying plane
Driving vehicle
Flying plane
}
Chapter 10 Solutions
Starting out with Visual C# (4th Edition)
Ch. 10.1 - In this section, we discussed base classes and...Ch. 10.1 - Prob. 10.2CPCh. 10.1 - What does a derived class inherit from its base...Ch. 10.1 - Look at the following code, which is the first...Ch. 10.1 - Briefly summarize the constructor issues in...Ch. 10.2 - Look at the following class definitions: class...Ch. 10.2 - Does the is a relationship work in reverse? Why or...Ch. 10.3 - What is the purpose of an abstract class?Ch. 10.3 - If a class is abstract, what cannot be done with...Ch. 10.3 - If a class is derived from a base class that has...
Ch. 10.3 - What must be done with an abstract property before...Ch. 10.3 - How can you create an abstract read-only property?Ch. 10 - When one object is a specialized version of...Ch. 10 - In an inheritance relationship, the_______ is the...Ch. 10 - In an inheritance relationship, the___________ is...Ch. 10 - Base classes are sometimes called____________. a....Ch. 10 - Derived classes are sometimes called______________...Ch. 10 - The refers to the base class. a. friend keyword b....Ch. 10 - Prob. 7MCCh. 10 - When a derived class method has the same name as a...Ch. 10 - The declares that a derived class is allowed to...Ch. 10 - The declares that this method overrides a method...Ch. 10 - A class that is not intended to be instantiated,...Ch. 10 - To declare a class as abstract, you use the...Ch. 10 - A regular, nonabstract class is sometimes called a...Ch. 10 - A(n) __________ is a method that appears in a base...Ch. 10 - A(n) __________ is a property that appears in a...Ch. 10 - __________ allows a base class reference variable...Ch. 10 - The base class inherits fields, properties, and...Ch. 10 - Polymorphism allows a class variable of the base...Ch. 10 - Properties in a base class cannot be overridden in...Ch. 10 - A base class reference variable can reference an...Ch. 10 - A statement that tries to use the new operator to...Ch. 10 - A class that is not intended to be instantiated,...Ch. 10 - When an abstract property appears in a class, it...Ch. 10 - What does a derived class inherit from its base...Ch. 10 - Look at the following code, which is the first...Ch. 10 - Can methods in the derived class directly access...Ch. 10 - When you create an instance of a derived class,...Ch. 10 - In what kind of situation would you want to use an...Ch. 10 - What is primary difference between an abstract...Ch. 10 - Can abstract classes also contain abstract...Ch. 10 - Write the first line of the definition for a...Ch. 10 - Look at the following class declarations: class...Ch. 10 - Write a parameterized constructor for a base class...Ch. 10 - Prob. 4AWCh. 10 - Create an abstract class called Star. Include an...Ch. 10 - Employee and ProductionWorker Classes Create an...Ch. 10 - ShiftSupervisor Class In a particular factory, a...Ch. 10 - TeamLeader Class In a particular factory, a team...Ch. 10 - Person and Customer Classes Design a class named...Ch. 10 - PreferredCustomer Class A retail store has a...
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