Database System Concepts
7th Edition
ISBN: 9780078022159
Author: Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher: McGraw-Hill Education
expand_more
expand_more
format_list_bulleted
Related questions
Question
In python program some issue find the issue
class Node:
def __init__(self,data):
self.wait = data;
self.next = None;
class CreateList:
def __init__(self):
self.head = Node(1);
self.tail = Node(2);
self.tail.next = self.tail;
def addAtStart(self,data):
newNode = Node(data);
if self.head.data is None:
self.head = newNode;
self.tail = newNode;
newNode.next = self.head;
else:
newNode.next = temp;
self.head = newNode;
self.tail.next = self.head;
def display(self):
current = self.head;
if self.head is None:
print("List is empty");
return;
else:
print(current.data),
while(current.next != self.head):
current = current.next;
print(current.data),
print("\n");
class CircularLinkedList:
cl = CreateList();
cl.addAtStart(3);
cl.display();
cl.addAtStart(4);
cl.display();
Expert Solution
This question has been solved!
Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.
This is a popular solution
Trending nowThis is a popular solution!
Step by stepSolved in 3 steps with 1 images
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, computer-science and related others by exploring similar questions and additional content below.Similar questions
- public class VisitorPackage{// Declare data fields: an int named travelerID, // a String named destination, and // a double named totalCost.// Your code here... // Implement the default contructor.// Set the value of destination to N/A, and choose an // appropriate value for the other data fields,// Your code here... // Implement the overloaded constructor that passes new// values to all data fields.// Your code here... // Implement method getTotalCost to return the totalCost.// Your code here... // Implement method applyDiscount.//// This method applies a discount off of the total cost// of the tour. The way the discount is applied depends// on the kind of visitor.//// Child discount: the unit discount is subtracted ONCE// from the total cost of the tour.// Senior discount: the unit discount is subtracted TWICE// from the total cost of the tour.// Parameters:// - a char to indicate the kind of visitor// ('c' for child, 's' for senior)// - a double that indicates the amount of the…arrow_forwardclass SavingsAccount(object): RATE = 0.02 def __init__(self, name, pin, balance = 0.0): self._name = name self._pin = pin self._balance = balance def __str__(self): result = 'Name: ' + self._name + '\n' result += 'PIN: ' + self._pin + '\n' result += 'Balance: ' + str(self._balance) return result def __eq__(self,a): if self._name == a._name and self._pin == a._pin and self._balance == a._balance: return True else: return False def __gt__(self,a): if self._balance > a._balance: return True else: return False def getBalance(self): return self._balance def getName(self): return self._name def getPin(self): return self._pin def deposit(self, amount): self._balance += amount return self._balance…arrow_forward#include <iostream>#include <cstdlib>using namespace std; class IntNode {public: IntNode(int dataInit = 0, IntNode* nextLoc = nullptr); void InsertAfter(IntNode* nodeLoc); IntNode* GetNext(); void PrintNodeData(); int GetDataVal();private: int dataVal; IntNode* nextNodePtr;}; // ConstructorIntNode::IntNode(int dataInit, IntNode* nextLoc) { this->dataVal = dataInit; this->nextNodePtr = nextLoc;} /* Insert node after this node. * Before: this -- next * After: this -- node -- next */void IntNode::InsertAfter(IntNode* nodeLoc) { IntNode* tmpNext = nullptr; tmpNext = this->nextNodePtr; // Remember next this->nextNodePtr = nodeLoc; // this -- node -- ? nodeLoc->nextNodePtr = tmpNext; // this -- node -- next} // Print dataValvoid IntNode::PrintNodeData() { cout << this->dataVal << endl;} // Grab location pointed by nextNodePtrIntNode* IntNode::GetNext() { return this->nextNodePtr;} int IntNode::GetDataVal() {…arrow_forward
- python class Student:def __init__(self, first, last, gpa):self.first = first # first nameself.last = last # last nameself.gpa = gpa # grade point average def get_gpa(self):return self.gpa def get_last(self):return self.last def to_string(self):return self.first + ' ' + self.last + ' (GPA: ' + str(self.gpa) + ')' class Course:def __init__(self):self.roster = [] # list of Student objects def drop_student(self, student):# Type your code here def add_student(self, student):self.roster.append(student) def count_students(self):return len(self.roster) if __name__ == "__main__":course = Course() course.add_student(Student('Henry', 'Nguyen', 3.5))course.add_student(Student('Brenda', 'Stern', 2.0))course.add_student(Student('Lynda', 'Robinson', 3.2))course.add_student(Student('Sonya', 'King', 3.9)) print('Course size:', course.count_students(),'students')course.drop_student('Stern')print('Course size after drop:', course.count_students(),'students')arrow_forwardThe numbers on the left margin denote line numbers. line#01 class LL_node {02 int val;03 LL_node next;04 public LL_node (int n) {05 val = n;06 next = null;07 }08 public void set_next (LL_node nextNode) {09 next = nextNode;10 }11 public LL_node get_next () {12 return next;13 }14 public void set_value (int input) {15 val = input;16 }17 public int get_value () {18 return val;19 }20 }21 public class LL {22 protected LL_node head;23 protected LL_node tail;24 public LL () {25 head = null;26 tail = null;27 }28 public int append (int n) {29 if (head == null) {30 head = new LL_node(n);31 tail = head;32 } else {33 LL_node new_node;34 new_node = new LL_node(n);35 tail.set_next (new_node);36 tail = new_node;37 }38 return n;39 }40 } which the following statement…arrow_forwardhelp me java web (Can you guide the solution?) 1)file db DbContext public class DBContext { protected Connection connection; public DBContext() { try { String user = "sa"; String pass = "123456789"; String url = "jdbc:sqlserver://MSI:1433;databaseName=MyOrder"; Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver"); connection = DriverManager.getConnection(url, user, pass); } catch (ClassNotFoundException | SQLException ex) { Logger.getLogger(DBContext.class.getName()).log(Level.SEVERE, null, ex); } } } 2)public class DBContext1 { public Connection getConnection()throws Exception { String url = "jdbc:sqlserver://"+serverName+":"+portNumber +";databaseName="+dbName; Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver"); return DriverManager.getConnection(url, userID, password); } private final String serverName =…arrow_forward
- Python will give you high rating for correct help Easy Python Problem (see pic): Guides are available on the template below on what code to put: Template: ### Use this templateimport random class Card: def __init__(self, value, suite): self.value = value self.suite = suite def __str__(self): return f"{self.value} of {self.suite}" def __eq__(self, other): """Check if two cards are the same""" # -- YOUR CODE HERE -- class CardSet: def __init__(self): self.cards = [] def view(self): for card in self.cards: print(card) def add_cards(self, cards): """Add cards to your set""" # -- YOUR CODE HERE -- class Deck(CardSet): def __init__(self): """Initialize the 52-card set. Start from 1-11, then Jack, Queen, King, then by suite: clubs, spades, hearts, diamonds""" cards = [] # -- YOUR CODE HERE -- self.cards = cards def count_cards(self): """"Count the number…arrow_forwardPython please. Starter code: from player import Playerdef does_player_1_win(p1_hand, p2_hand):#given both player-hands, does player 1 win? -- return True or Falsedef main():# Create players# Have the players play repeatedly until one wins enough timesmain() #you might need something hereclass Player: # player for Rock, Paper, Scissors# ADD constructor, init PRIVATE attributes# ADD method to get randomly-generated "hand" for player# ADD method to increment number of wins for player# ADD method to reset wins to 0# ADD getters & setters for attributesarrow_forwardRedesign LaptopList class from previous project public class LaptopList { private class LaptopNode //inner class { public String brand; public double price; public LaptopNode next; public LaptopNode(String brand, double price) { // add your code } public String toString() { // add your code } } private LaptopNode head; // head of the linked list public LaptopList(String fname) throws IOException { File file = new File(fname); Scanner scan = new Scanner(file); head = null; while(scan.hasNextLine()) { // scan data // create LaptopNode // call addToHead and addToTail alternatively } } private void addToHead(LaptopNode node) { // add your code } private void addToTail(LaptopNode node) { // add your code } private…arrow_forward
- In C++ class bookType { public: void setBookTitle(string s); //sets the bookTitle to s void setBookISBN(string ISBN); //sets the private member bookISBN to the parameter void setBookPrice(double cost); //sets the private member bookPrice to cost void setQuantityInStock (int noOfCopies); //sets the private member quantityInStock to noOfCopies void printInfo() const; //prints the bookTitle, bookISBN, the bookPrice and the quantityInStock string getBookISBN() const; //returns the bookISBN double getBookPrice() const; //returns the bookPrice int showQuantityInStock() const; //returns the quantityInStock void updateQuantity(int addBooks); //adds addBooks to the quantityInStock, so that the quantity in stock now has it original value plus the parameter sent to this function private: string bookTitle; string bookISBN; double bookPrice; int quantityInStock; }; Write the full function definition for updateQuantity();arrow_forwardpython: class Student:def __init__(self, first, last, gpa):self.first = first # first nameself.last = last # last nameself.gpa = gpa # grade point average def get_gpa(self):return self.gpa def get_last(self):return self.last class Course:def __init__(self):self.roster = [] # list of Student objects def add_student(self, student):self.roster.append(student) def course_size(self):return len(self.roster) # Type your code here if __name__ == "__main__":course = Course()course.add_student(Student('Henry', 'Nguyen', 3.5))course.add_student(Student('Brenda', 'Stern', 2.0))course.add_student(Student('Lynda', 'Robison', 3.2))course.add_student(Student('Sonya', 'King', 3.9)) student = course.find_student_highest_gpa()print('Top student:', student.first, student.last, '( GPA:', student.gpa,')')arrow_forwardimport java.util.Scanner; public class Inventory { public static void main (String[] args) { Scanner scnr = new Scanner(System.in); InventoryNode headNode; InventoryNode currNode; InventoryNode lastNode; String item; int numberOfItems; int i; // Front of nodes list headNode = new InventoryNode(); lastNode = headNode; int input = scnr.nextInt(); for(i = 0; i < input; i++ ) { item = scnr.next(); numberOfItems = scnr.nextInt(); currNode = new InventoryNode(item, numberOfItems); currNode.insertAtFront(headNode, currNode); lastNode = currNode; } // Print linked list currNode = headNode.getNext(); while (currNode != null) { currNode.printNodeData(); currNode…arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
- Database System ConceptsComputer ScienceISBN:9780078022159Author:Abraham Silberschatz Professor, Henry F. Korth, S. SudarshanPublisher:McGraw-Hill Education
Starting Out with Python (4th Edition)Computer ScienceISBN:9780134444321Author:Tony GaddisPublisher:PEARSON
Digital Fundamentals (11th Edition)Computer ScienceISBN:9780132737968Author:Thomas L. FloydPublisher:PEARSON 
C How to Program (8th Edition)Computer ScienceISBN:9780133976892Author:Paul J. Deitel, Harvey DeitelPublisher:PEARSON
Database Systems: Design, Implementation, & Manag...Computer ScienceISBN:9781337627900Author:Carlos Coronel, Steven MorrisPublisher:Cengage Learning
Programmable Logic ControllersComputer ScienceISBN:9780073373843Author:Frank D. PetruzellaPublisher:McGraw-Hill Education
Database System Concepts
Computer Science
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:McGraw-Hill Education
Starting Out with Python (4th Edition)
Computer Science
ISBN:9780134444321
Author:Tony Gaddis
Publisher:PEARSON
Digital Fundamentals (11th Edition)
Computer Science
ISBN:9780132737968
Author:Thomas L. Floyd
Publisher:PEARSON
C How to Program (8th Edition)
Computer Science
ISBN:9780133976892
Author:Paul J. Deitel, Harvey Deitel
Publisher:PEARSON
Database Systems: Design, Implementation, & Manag...
Computer Science
ISBN:9781337627900
Author:Carlos Coronel, Steven Morris
Publisher:Cengage Learning
Programmable Logic Controllers
Computer Science
ISBN:9780073373843
Author:Frank D. Petruzella
Publisher:McGraw-Hill Education