OOP

itgeorge

Common Type System

  1. Define a classStudent, which contains data about a student – first, middle and last name, SSN, permanent address, mobile phone e-mail, course, specialty, university, faculty. Use an enumeration for the specialties, universities and faculties. Override the standard methods, inherited by System.Object:Equals(),ToString(),GetHashCode()and operators==and!=.
  2. Add implementations of the ICloneableinterface. The Clone()method should deeply copy all object’s fields into a new object of type Student.
  3. Implement the IComparable<Student>interface to compare students by names (as first criteria, in lexicographic order) and by social security number (as second criteria, in increasing order).GitHub Link
  4. Create a class Person with two fields – name and age. Age can be left unspecified (may contain nullvalue. Override ToString() to display the information of a person and if age is not specified – to say so. Write a program to test this functionality.GitHub Link
  5. Define a class BitArray64 to hold 64 bit values inside an ulong value. Implement IEnumerable<int> and Equals(…), GetHashCode(), [], == and !=.GitHub Link
  6. * Define the data structure binary search tree with operations for “adding new element”, “searching element” and “deleting elements”. It is not necessary to keep the tree balanced. Implement the standard methods from System.Object – ToString(), Equals(…),GetHashCode()and the operators for comparison ==and!=.Add and implement the ICloneable interface for deep copy of the tree. Remark: Use two types – structure BinarySearchTree (for the tree) and classTreeNode (for the tree elements). Implement IEnumerable<T> to traverse the tree.GitHub Link
itgeorge

Object Oriented Programming Fundamental Principles Part II

  1. Define abstract class Shape with only one abstract method CalculateSurface() and fields width and height. Define two new classes Triangle and Rectangle that implement the virtual method and return the surface of the figure (height*width for rectangle and height*width/2 for triangle). Define class Circle and suitable constructor so that at initialization height must be kept equal to width and implement the CalculateSurface() method. Write a program that tests the behavior of the CalculateSurface() method for different shapes(Circle, Rectangle, Triangle) stored in an array.GitHub Link
  2. A bank holds different types of accounts for its customers: deposit accounts, loan accounts and mortgage accounts. Customers could be individuals or companies.
    All accounts have customer, balance and interest rate (monthly based). Deposit accounts are allowed to deposit and with draw money. Loan and mortgage accounts can only deposit money.All accounts can calculate their interest amount for a given period (in months). In the common case its is calculated as follows: number_of_months * interest_rate.Loan accounts have no interest for the first 3 months if are held by individuals and for the first 2 months if are held by a company.

    Deposit accounts have no interest if their balance is positive and less than 1000.

    Mortgage accounts have ½ interest for the first 12 months for companies and no interest for the first 6 months for individuals.

    Your task is to write a program to model the bank system by classes and interfaces. You should identify the classes, interfaces, base classes and abstract actions and implement the calculation of the interest functionality through overridden methods.

    GitHub Link

  3. Define a class InvalidRangeException<T> that holds information about an error condition related to invalid range. It should hold error message and a range definition [start … end].
    Write a sample application that demonstrates the InvalidRangeException<int>and InvalidRangeException<DateTime>by entering numbers in the range [1..100] and dates in the range [1.1.1980 … 31.12.2013].GitHub Link
itgeorge

Object Oriented Programming Fundamental Principles Part I

 

  1. We are given a school. In the school there are classes of students. Each class has a set of teachers. Each teacher teaches a set of disciplines. Students have name and unique class number. Classes have unique text identifier. Teachers have name. Disciplines have name, number of lectures and number of exercises. Both teachers and students are people. Students, classes, teachers and disciplines could have optional comments (free text block).
    Your task is to identify the classes (in terms of OOP) and their attributes and operations, encapsulate their fields, define the class hierarchy and create a class diagram with Visual Studio. 

    GitHub Link 

  2. Define abstract class Human with first name and last name. Define new class Student which is derived from Human and has new field – grade. Define class Worker derived from Human with new property WeekSalary and WorkHoursPerDay and method MoneyPerHour() that returns money earned by hour by the worker. Define the proper constructors and properties for this hierarchy. Initialize a list of 10 students and sort them by grade in ascending order (use LINQ or OrderBy() extension method). Initialize a list of 10 workers and sort them by money per hour in descending order. Merge the lists and sort them by first name and last name.GitHub Link
  3. Create a hierarchy Dog, Frog, Cat, Kitten, Tomcat and define useful constructors and methods. Dogs, frogsand cats are Animals. All animals can produce sound (specified by the ISound interface). Kittens and tomcats are cats. All animals are described by age, name and sex. Kittens can be only female and tomcats can be only male. Each animal produces a specific sound. Create arrays of different kinds of animals and calculate the average age of each kind of animal using a static method (you may use LINQ)GitHub Link