write java code segment that create a class C and C class inherits from B. The C class contain an integer variable c and assign its value using default constructor

Write code in C#   You must create parts of a small application that allows the user to manage the information on items for sale at a local store. The system must allow a user to add, delete and search for items. The system can hold a maximum of 10000 items.   The class definition for an Item is given in the UML diagram below   Note: getInfo() returns a string containing ALL of the state information neatly organized.   Part 1:  Create a class based on the specification above. Reminder:  – means private and +  means public.   Part 2:  a) Write a function/method called “addItem” that takes: An array of items The number of items in the array An integer representing a barcode A string representing the name of an item A string representing the description of an item A double value representing the price   The function must create and add the item to the array if there is space. The function must return “true” if the addition was successful and “false” otherwise.   b) Write a…

Lab02-03. Reference Type C++ :  Write a program that defines an object of type double called myDouble. Define an object of reference type called myReference and initialize it with myDouble. Change the value of myReference. Print the object value using both the reference and the original variable. Change the value of myDouble. Print the value of both objects.

In C++ Q1.) Write a Review class that has: • These private data members: • string user: ID of the user • string item: ID of the item • double paid: the price of the item that the user buys • double rating: the rating that the user gives to the item • string review: the review content that the user gives to the item • These public member functions: • A default constructor to set all instance variables to a default value • A parameterized constructor (i.e., a constructor with arguments) to set all instance variables • A method for getting/setting the instance variables. • A method for printing the Review's information.

Evaluating Postfix Expression The Postfix notation is used to represent algebraic expressions. The expressions written in postfix form are evaluated faster compared to infix notation as parenthesis are not required in postfix. We have discussed infix to postfix conversion in the class. Write a Java program that will input a valid postfix expression. The expression may accept a whole number or a real number. Every operand and operator should be separated by a space. Make sure to trap possible errors.Sample Output (Must be implement in GUI)

do part 4 import java.util.*; // Car classclass Car{    private String name;    // Variable to hold car name    private String model;    // Variable to hold car model        // Default constructor    Car(){        this.name = null;        this.model = null;    }        // Parametrised constructor    Car(String name, String model){        this.name = name;        this.model = model;    }        // Function to get car name    public String getName(){        return this.name;    }} // Dealer classclass Dealer{    private Car[] arr;    // Array holding car objects for a dealer    private int count;    // Variable to hold number of cars under a dealer        // Default constructor    Dealer(){        arr = new Car[50];        count=0;    }        // Function to add a car under a dealer    public void addCar(Car obj){        this.arr[this.count] = obj;        this.count++;    }        // Function to check if a car exists under a dealer or not    public boolean contains(String name){…

Need help with c++ (1) Define the class ContactNode per the following specifications: Private data members string contactName string contactPhoneNumber ContactNode* nextNodePtr Constructor with parameters for name followed by phone number  Public member functions GetName() - Accessor GetPhoneNumber() - Accessor  InsertAfter()  GetNext() - Accessor PrintContactNode() Ex: If the name is Roxanne Hughes and the phone number is 443-555-2864, PrintContactNode() outputs: Name: Roxanne Hughes Phone number: 443-555-2864 (2) Define main() to read the name and phone number for three contacts and output each contact. Create three ContactNodes and use the nodes to build a linked list. (1st attached image) (3) Output the linked list using a loop to output contacts one at a time. (2nd attached image) Provided template: #include <iostream>using namespace std; class ContactNode {public:   /* Declare member functions here */   private:   /* Declare data members here */   }; /* Define…

Oop java

C++ Test Review

C++ programming 1. Design a class bookType that defines the book as an ADT.     Each object of the class bookType can hold the following information about a book: title, up to four authors, publisher, ISBN, price, and number of copies in stock. To keep track of the number of authors, add another member variable.    Include the member functions to perform the various operations on objects of type bookType. For example, the usual operations that can be performed on the title are to show the title, set the title, and check whether a title is the same as the actual title of the book. Similarly, the typical operations that can be performed on the number of copies in stock are to show the number of copies in stock, set the number of copies in stock, update the number of copies in stock, and return the number of copies in stock. Add similar operations for the publisher, ISBN, book price, and authors. Add the appropriate constructors and a destructor (if one is needed).    Write the…