
Concept explainers
A)
Explanation of Solution
Purpose of the given code:
The given code is trying to print the members of a linked list by traversing through the entire list by using a destructor. A destructor is called when the program ends or the destructor function calls.
Given Code:
//Definition of destructor
NumberList::printList()//Line 1
{//Line 2
//loop
//Error line3
while(head)//Line 3
{//Line 4
/*Print the data value of the node while traversing through the list*/
cout<<head->value; //Line5
/*the pointer is moved one position ahead till end of list */
head= head->next;//Line6
}//Line 7
}//Line 8
Error in the given code:
- In “line 3”, use of the head pointer to walk down the list destroys the list.
- This should be written as an “auxiliary pointer”. So, correct code is given below:
ListNode *nodePtr = head
- This should be written as an “auxiliary pointer”. So, correct code is given below:
while (nodePtr != null)
;&#x...
B)
Explanation of Solution
Purpose of the given code:
The given code is trying to print the members of a linked list by traversing through the entire list by using a destructor. A destructor is called when the program ends or the destructor function calls.
Given Code:
//Definition of destructor
NumberList::PrintList()//Line 1
{//Line 2
//Declaration of structure pointer variables
//Line3
ListNode *p =head; /*the start or head of the list is stored in p */
//loop
//Error Line4
while (p->next) //Line4
{//Line 5
/*Print the data value of node p while traversing through the linklist */
//Line6
cout<<p->value; /*print the individual data values of each node */
//Line7
p=p->next; //the pointer is moved one position ahead till end of list
}//Line8
}//Line9
Error in the given code:
- In “line 4”, eventually the pointer p becomes “NULL”, at which time the attempt to access p->NULL will result in an error.
- This should be written by replacing the text p->next in the while loop with p.
while (p) //Line4
/*Here the loop will traverse till p exists or till p is not NULL */
- The function fails to declare a return type of void...
C)
Explanation of Solution
Purpose of the given code:
The given code is trying to print the members of a linked list by traversing through the entire list by using a destructor. A destructor is called when the program ends or the destructor function calls.
Given Code:
//Definition of destructor
NumberList::PrintList()//Line 1
{//Line 2
//Declaration of structure pointer variables
//Line3
ListNode *p =head; /*the start or head of the list is stored in p */
//loop
// Line4
while (p) //Line4
{//Line 5
/*Print the data value of node p while traversing through the linklist */
//Line6
cout<<p->value; /*print the individual data values of each node */
//Error Line7
//Line7
p++//the pointer is incremented by one position
}//Line8
}//Line9
Error in the given code:
- In “line 7”, the function uses p++ erroneously in place of p=p->next when attempting to move to the next node in the list. This is not possible as increment operator can work only on variables containing data values but here p is a node of a link list which contains an address value pointer pointing to the next list along with a data value.
- This should be written by replacing the text p++ in the while loop body with p=p->next...
D)
Explanation of Solution
Purpose of the given code:
The given code is trying to destroy the members of a linked list by using a destructor. A destructor is called when the program ends or the destructor function calls.
Given Code:
//Definition of destructor
NumberList::~NumberList()//Line 1
{//Line 2
//Declaration of structure pointer variables
ListNode *nodePtr, *nextNode;//Line 3
//Storing "head" pointer into "nodePtr"
nodePtr = head;//Line 4
//loop
while (nodePtr != nullptr)//Line 5
{//Line 6
//Assign address of next into "nextNode"
nextNode = nodePtr->next;//Line 7
//Error
nodePtr->next=nullptr;//Line 8
//Assign nextNode into "nodePtr"
nodePtr = nextNode;//Line 9
}//Line 10
}//Line 11
Error in the given code:
In “line 8”, the address of “next” in “nodePtr” is assigned as “nullptr”.
- This should be written as “delete nodePtr” to delete the value of node from the list, because, “delete” operator is used to free the memory space allocated by the list...

Want to see the full answer?
Check out a sample textbook solution
Chapter 17 Solutions
Starting Out with C++: Early Objects (9th Edition)
- Lab 07: Java Graphics (Bonus lab) In this lab, we'll be practicing what we learned about GUIs, and Mouse events. You will need to implement the following: ➤ A GUI with a drawing panel. We can click in this panel, and you will capture those clicks as a Point (see java.awt.Point) in a PointCollection class (you need to build this). о The points need to be represented by circles. Below the drawing panel, you will need 5 buttons: о An input button to register your mouse to the drawing panel. ○ о о A show button to paint the points in your collection on the drawing panel. A button to shift all the points to the left by 50 pixels. The x position of the points is not allowed to go below zero. Another button to shift all the points to the right 50 pixels. The x position of the points cannot go further than the You can implement this GUI in any way you choose. I suggest using the BorderLayout for a panel containing the buttons, and a GridLayout to hold the drawing panel and button panels.…arrow_forwardIf a UDP datagram is sent from host A, port P to host B, port Q, but at host B there is no process listening to port Q, then B is to send back an ICMP Port Unreachable message to A. Like all ICMP messages, this is addressed to A as a whole, not to port P on A. (a) Give an example of when an application might want to receive such ICMP messages. (b) Find out what an application has to do, on the operating system of your choice, to receive such messages. (c) Why might it not be a good idea to send such messages directly back to the originating port P on A?arrow_forwardDiscuss how business intelligence and data visualization work together to help decision-makers and data users. Provide 2 specific use cases.arrow_forward
- This week we will be building a regression model conceptually for our discussion assignment. Consider your current workplace (or previous/future workplace if not currently working) and answer the following set of questions. Expand where needed to help others understand your thinking: What is the most important factor (variable) that needs to be predicted accurately at work? Why? Justify its selection as your dependent variable.arrow_forwardAccording to best practices, you should always make a copy of a config file and add a date to filename before editing? Explain why this should be done and what could be the pitfalls of not doing it.arrow_forwardIn completing this report, you may be required to rely heavily on principles relevant, for example, the Work System, Managerial and Functional Levels, Information and International Systems, and Security. apply Problem Solving Techniques (Think Outside The Box) when completing. should reflect relevance, clarity, and organisation based on research. Your research must be demonstrated by Details from the scenario to support your analysis, Theories from your readings, Three or more scholarly references are required from books, UWIlinc, etc, in-text or narrated citations of at least four (4) references. “Implementation of an Integrated Inventory Management System at Green Fields Manufacturing” Green Fields Manufacturing is a mid-sized company specialising in eco-friendly home and garden products. In recent years, growing demand has exposed the limitations of their fragmented processes and outdated systems. Different departments manage production schedules, raw material requirements, and…arrow_forward
- 1. Create a Book record that implements the Comparable interface, comparing the Book objects by year - title: String > - author: String - year: int Book + compareTo(other Book: Book): int + toString(): String Submit your source code on Canvas (Copy your code to text box or upload.java file) > Comparable 2. Create a main method in Book record. 1) In the main method, create an array of 2 objects of Book with your choice of title, author, and year. 2) Sort the array by year 3) Print the object. Override the toString in Book to match the example output: @Javadoc Declaration Console X Properties Book [Java Application] /Users/kuan/.p2/pool/plugins/org.eclipse.justj.openjdk.hotspo [Book: year=1901, Book: year=2010]arrow_forwardQ5-The efficiency of a 200 KVA, single phase transformer is 98% when operating at full load 0.8 lagging p.f. the iron losses in the transformer is 2000 watt. Calculate the i) Full load copper losses ii) half load copper losses and efficiency at half load. Ans: 1265.306 watt, 97.186%arrow_forward2. Consider the following pseudocode for partition: function partition (A,L,R) pivotkey = A [R] t = L for i L to R-1 inclusive: if A[i] A[i] t = t + 1 end if end for A [t] A[R] return t end function Suppose we call partition (A,0,5) on A=[10,1,9,2,8,5]. Show the state of the list at the indicated instances. Initial A After i=0 ends After 1 ends After i 2 ends After i = 3 ends After i = 4 ends After final swap 10 19 285 [12 pts]arrow_forward
- .NET Interactive Solving Sudoku using Grover's Algorithm We will now solve a simple problem using Grover's algorithm, for which we do not necessarily know the solution beforehand. Our problem is a 2x2 binary sudoku, which in our case has two simple rules: •No column may contain the same value twice •No row may contain the same value twice If we assign each square in our sudoku to a variable like so: 1 V V₁ V3 V2 we want our circuit to output a solution to this sudoku. Note that, while this approach of using Grover's algorithm to solve this problem is not practical (you can probably find the solution in your head!), the purpose of this example is to demonstrate the conversion of classical decision problems into oracles for Grover's algorithm. Turning the Problem into a Circuit We want to create an oracle that will help us solve this problem, and we will start by creating a circuit that identifies a correct solution, we simply need to create a classical function on a quantum circuit that…arrow_forwardusing r languagearrow_forward8. Cash RegisterThis exercise assumes you have created the RetailItem class for Programming Exercise 5. Create a CashRegister class that can be used with the RetailItem class. The CashRegister class should be able to internally keep a list of RetailItem objects. The class should have the following methods: A method named purchase_item that accepts a RetailItem object as an argument. Each time the purchase_item method is called, the RetailItem object that is passed as an argument should be added to the list. A method named get_total that returns the total price of all the RetailItem objects stored in the CashRegister object’s internal list. A method named show_items that displays data about the RetailItem objects stored in the CashRegister object’s internal list. A method named clear that should clear the CashRegister object’s internal list. Demonstrate the CashRegister class in a program that allows the user to select several items for purchase. When the user is ready to check out, the…arrow_forward
- C++ Programming: From Problem Analysis to Program...Computer ScienceISBN:9781337102087Author:D. S. MalikPublisher:Cengage LearningSystems ArchitectureComputer ScienceISBN:9781305080195Author:Stephen D. BurdPublisher:Cengage LearningEBK JAVA PROGRAMMINGComputer ScienceISBN:9781337671385Author:FARRELLPublisher:CENGAGE LEARNING - CONSIGNMENT
- C++ for Engineers and ScientistsComputer ScienceISBN:9781133187844Author:Bronson, Gary J.Publisher:Course Technology PtrNew Perspectives on HTML5, CSS3, and JavaScriptComputer ScienceISBN:9781305503922Author:Patrick M. CareyPublisher:Cengage LearningProgramming Logic & Design ComprehensiveComputer ScienceISBN:9781337669405Author:FARRELLPublisher:Cengage




