Introduction to Java Programming and Data Structures, Comprehensive Version (11th Edition)
11th Edition
ISBN: 9780134670942
Author: Y. Daniel Liang
Publisher: PEARSON
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Textbook Question
Chapter 13.6, Problem 13.6.5CP
What is wrong in the following code?
public class Test {
public static void main(String[] args) {
Person[] persons = {new Person(3), new Person(4), new Person(1)};
java.util.Arrays.sort(persons);
}
}
class Person {
private int id;
Person(int id) {
this.id = id;
}
}
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class TenNums {private: int *p; public: TenNums() { p = new int[10]; for (int i = 0; i < 10; i++) p[i] = i; } void display() { for (int i = 0; i < 10; i++) cout << p[i] << " "; }};int main() { TenNums a; a.display(); TenNums b = a; b.display(); return 0;}
Write a copy constructor for the above class TenNums. Make sure it performs deep copy.
Group of answer choices
TenNums(const TenNums& b) { p = b.p;}
TenNums(const TenNums& b) { p = new int[10]; for (int i = 0; i < 10; i++) p[i] = b.p[i];}
TenNums(const TenNums b) { p = new int[10]; for (int i = 0; i < 10; i++) p[i] = b.p[i];}
TenNums(const TenNums b) { p = b.p;}
class TenNums {private: int *p; public: TenNums() { p = new int[10]; for (int i = 0; i < 10; i++) p[i] = i; } void display() { for (int i = 0; i < 10; i++) cout << p[i] << " "; }};int main() { TenNums a; a.display(); TenNums b = a; b.display(); return 0;}
Continuing from Question 4, let's say I added the following overloaded operator method to the class. Which statement will invoke this method?
TenNums TenNums::operator+(const TenNums& b) { TenNums o; for (int i = 0; i < 10; i++) o.p[i] = p[i] + b.p [i]; return o;}
Group of answer choices
TenNums a;
TenNums b = a;
TenNums c = a + b;
TenNums c = a.add(b);
public class LabProgram {
public static void main(String args[]) {
Course cis162 = new Course();
int beforeCount;
String toDrop;
// Example students for testing
cis162.addStudent(new Student("Henry", "Nguyen", 3.5));
cis162.addStudent(new Student("Brenda", "Stern", 2.0));
cis162.addStudent(new Student("Lynda", "Robison", 3.2));
cis162.addStudent(new Student("Sonya", "King", 3.9));
toDrop = "Stern";
beforeCount = cis162.countStudents();
cis162.dropStudent(toDrop);
System.out.println("Course size: " + beforeCount + " students");
System.out.println("Course size after drop: " + cis162.countStudents() + " students");
}
}
import java.text.DecimalFormat;
// Class representing a student
public class Student {
private String first; // first name
private String last; // last name
private double gpa; // grade point average
// Student class constructor
public Student(String f, String l, double g) {…
Chapter 13 Solutions
Introduction to Java Programming and Data Structures, Comprehensive Version (11th Edition)
Ch. 13.2 - Prob. 13.2.1CPCh. 13.2 - The getArea() and getPerimeter() methods may be...Ch. 13.2 - True or false? a.An abstract class can be used...Ch. 13.3 - Prob. 13.3.1CPCh. 13.3 - Prob. 13.3.2CPCh. 13.3 - Prob. 13.3.3CPCh. 13.3 - What is wrong in the following code? (Note the...Ch. 13.3 - What is wrong in the following code? public class...Ch. 13.4 - Can you create a Calendar object using the...Ch. 13.4 - Prob. 13.4.2CP
Ch. 13.4 - How do you create a Calendar object for the...Ch. 13.4 - For a Calendar object c, how do you get its year,...Ch. 13.5 - Prob. 13.5.1CPCh. 13.5 - Prob. 13.5.2CPCh. 13.5 - Prob. 13.5.3CPCh. 13.5 - Prob. 13.5.4CPCh. 13.6 - Prob. 13.6.1CPCh. 13.6 - Prob. 13.6.2CPCh. 13.6 - Can the following code be compiled? Why? Integer...Ch. 13.6 - Prob. 13.6.4CPCh. 13.6 - What is wrong in the following code? public class...Ch. 13.6 - Prob. 13.6.6CPCh. 13.6 - Listing 13.5 has an error. If you add list.add...Ch. 13.7 - Can a class invoke the super.clone() when...Ch. 13.7 - Prob. 13.7.2CPCh. 13.7 - Show the output of the following code:...Ch. 13.7 - Prob. 13.7.4CPCh. 13.7 - What is wrong in the following code? public class...Ch. 13.7 - Show the output of the following code: public...Ch. 13.8 - Prob. 13.8.1CPCh. 13.8 - Prob. 13.8.2CPCh. 13.8 - Prob. 13.8.3CPCh. 13.9 - Show the output of the following code: Rational r1...Ch. 13.9 - Prob. 13.9.2CPCh. 13.9 - Prob. 13.9.3CPCh. 13.9 - Simplify the code in lines 8285 in Listing 13.13...Ch. 13.9 - Prob. 13.9.5CPCh. 13.9 - The preceding question shows a bug in the toString...Ch. 13.10 - Describe class-design guidelines.Ch. 13 - (Triangle class) Design a new Triangle class that...Ch. 13 - (Shuffle ArrayList) Write the following method...Ch. 13 - (Sort ArrayList) Write the following method that...Ch. 13 - (Display calendars) Rewrite the PrintCalendar...Ch. 13 - (Enable GeometricObject comparable) Modify the...Ch. 13 - Prob. 13.6PECh. 13 - (The Colorable interface) Design an interface...Ch. 13 - (Revise the MyStack class) Rewrite the MyStack...Ch. 13 - Prob. 13.9PECh. 13 - Prob. 13.10PECh. 13 - (The Octagon class) Write a class named Octagon...Ch. 13 - Prob. 13.12PECh. 13 - Prob. 13.13PECh. 13 - (Demonstrate the benefits of encapsulation)...Ch. 13 - Prob. 13.15PECh. 13 - (Math: The Complex class) A complex number is a...Ch. 13 - (Use the Rational class) Write a program that...Ch. 13 - (Convert decimals to fractious) Write a program...Ch. 13 - (Algebra: solve quadratic equations) Rewrite...Ch. 13 - (Algebra: vertex form equations) The equation of a...
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