Write a class for the city database using unordered lists. Each database record contains the name of the city (a string of arbitrary length) and the coordinates of the city expressed as integer x and y coordinates. Your database should allow records to be inserted, deleted by name, and searched by name or coordinate. Implement the database using an array-based list. Develop a simple test (as the main function) Run your program and present the results of the test.
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- for c++ A set is a collection of distinct elements of the same type. Design the class unorderedSetType. Design the class unorderedSetType, derived from the class unorderedArrayListType, to manipulate sets. Note that you need to redefine only the functions insertAt, insertEnd, and replaceAt. If the item to be inserted is already in the list, the functions insertAt and insertEnd output an appropriate message. Similarly, if the item to be replaced is already in the list, the function replaceAt outputs an appropriate message. Write a program to test your class.A programmer is designing a program to catalog all books in a library. He plans to have a Book class that stores features of each book: author, title, isOnShelf, and so on, with operations like getAuthor, getTitle, getShelf Info, and set Shelf Info. Another class, LibraryList, will store an array of Book objects. The LibraryList class will include operations such as listAll Books, addBook, removeBook, and searchForBook. The programmer plans to implement and test the Book class first, before implementing the LibraryList class. The program- mer's plan to write the Book class first is an example of (A) top-down development. (B) bottom-up development. (C) procedural abstraction. (D) information hiding. (E) a driver program.Write a program in C++ using circular link list of online shopping cartImplement the above scenario using Circular Link List. Do Following:First create a class Item having id, name, price and quantity provide appropriate methods and then Create Cart/List class which holds an items object to represent total items in cart and next pointer Implement the method to add items in the array, remove an item and display all items. Now in the main do the following Insert Items in list Display all items. Traverse the link list so that each items bill gets calculated (by multiplying quantity with price) and also calculate and display Total bill in the end. Delete an item if user wants to remove an item form the cart.
- Part 1: You are required to build an application to assist in the conduct of Assessments. The class Assessment represent the notion of any kind of assessment including Quiz, Assignment and Examination. Please follow the given steps to implement the applications 1. Construct a class Assessment with the following attributes a. Id (int) b. Topic(String) c. MaxMarks(double) d. Date of conduct (doc) (GregorianCalendar) e. attempts ArrayList //an array list that will contain the Attempts objects 2. In order to complete the above class you will have to write a class Attempt with the following attributes. This class represents the attempts that students have made against this assessment. a. studentId(int) b. studentName(String) c. marksObtained(double) 3. Provide constructor in Attempt class with values for all attributes 4. Provide getters and setters for each 5. Provide a toString method that produces the following string Student = --id-- : name Marks Obtained : --marks— 6. Now complete the…Implement a city database using ordered lists. Each database record contains the name of the city (a string of arbitrary length) and the coordinates of the city expressed as integer x and y coordinates. Your database should allow records to be inserted, deleted by name, and searched by name. Another operation that should be supported is to print all records within a given distance of a specified point/coordinate. The order of cities should be alphabetically by city name. Implement the database using: an array- based list implementation. By using JAVA.Add the following functions and write a program to test these functions in the class linkedListType: a. Write the definition of a function that returns the data of the kth element of the linked list. If such element is not exist in the list, exit the program. b. Write the definition of a function that deletes the kth element of the linked list. If such element is not exist in the list, exit the program and display message as output. (Subject:Data stracture and algorithm )
- 1. Write a program to input a list of names (strings) from the user and store them in an ArrayList. The input can be terminated by entering the empty string or byentering the string “quit”. 2. Add further functionality to your program so that it searches the ArrayList to find the first string and the last string according to dictionary ordering and then prints out these strings (names). Do this exercise without sorting the names in the ArrayList. For example, if the list contains the following names: Charles Darwin Albert Einstein Issac Newton Tony Hoare Grace Hopper Edgar Dijkstra Ada Lovelace Charles Babbage Stephen Hawking Your program should output:The first name in the list in alphabetical order is: Ada Lovelace The last name in the list in alphabetical order is: Tony HoareComputer Science Done in Perl. Someone gave me a wrong/incomplete answer. Write a function, hashsum, which takes a hash reference as its first argument and an array reference as its second argument. The function should take the elements of the array and use them as keys in the hash. The values in the hash corresponding to the keys in the array should be totaled, and the sum should be returned to the user. If a key passed in the array does not exist in the hash, ignore it. Write a sample program to call this function.a. Create a Main class "CheckList. Inside the main method of the Main class create n number of objects of the List class. For each of the objects perform 5 input operations using the push method. b. Now create a static method inside the Main class " Boolean CompareTo(List 11, List 12)" which will take any two objects of list type and return true if all the elements of the two objects are the same and return false otherwise. c. Now create a static method inside the Main class " Boolean Equals (List 11, List 12)" which will take any two objects of list type and return true if the size of the two objects are the same and return false otherwise. d. Before executing the operation mentioned in 3(a), if we declare Count variable of the List class as a static variable then what will be the impact of these two objects? Explain with your own words. e. Is it possible to call the List (int MaxSize) constructor from the List()constructor? If yes then please write that specific part of the code…
- The function remove of the class arrayList removes only the first occurrence of an element. Add the function removeAll to the class arrayList that would remove all occurrences of a given element. Also, write the definition of the function removeAll and a program to test this functionWrite a program that declares/intializes two arrays as described in main() and has two functions. main() - The size of both arrays is 5. The first array has elements of type double. The values are for distance measurements. Choose a descriptive name for this array.The second array will have the unit of measure. Choose a descriptive name for this array. Initialize the first 4 elements using an initialization list with the values "mi", "mi", "km", "km". Assign a new value to the first element of the second array: "km"Assign a value to the last element of the second array: "mi" Use a loop with statement that ask the user to type in all of the values for the temperatures and assign them to the first array. Function calls in main() -- you might want to write the definitions first (or at least read about them) before coming back to main() to write the calls. call the function that prints the measurements along with the unit of measure.Call the function that can count the number of…Task 4. Utility classes Implement a Menu-Driven program of ArrayList class using the above scenario and perform the following operations. a. Create an object of ArrayList class based on the scenario with explanations of the method used. b. Create a method that will allow inserting an element to ArrayList Class based on the scenario. The input field must be validated as necessary. C. Create a method to delete specific elements in the ArrayList with explanations of the method used.