Using C# Language: Programming PLO 3 Measured: Create control structures, methods with the appropriate parameters, and data structures of the appropriate type, and implement algorithms to solve problems.   Design a class named Contractor. The class should keep the following information:   Contractor name Contractor number Contractor start date   Write one or more constructors and the appropriate accessor and mutator functions for the class.   Write another class named Subcontractor that is derived from the Contractor class. The Subcontractor class should have member variables to hold the following information:   Shift (an integer) Hourly pay rate (a double)   The work is divided between two shifts, a day shift, and a night shift. The shift variable will hold an integer value representing the shift that the subcontractor will work. The day shift is 1 and the night shift is 2. Write one or more constructors and the appropriate accessor functions for the class. Demonstrate the classes…

C++ You may work on a single class. The parameter and return type s of each function and class member function should be decided in advance. The program will be best implemented as a multi-file program, (header file, the main program,..) Design a generic class to hold the following information about a bank account: Balance Number of deposits this month Number of withdrawals Annual Interest Rate Monthly service charges The class should have the following member function:                 Constructors Accepts arguments for the balance and annual interest rate.     deposit   a virtual function that accepts an argument for the amount of the deposit. The function should add the argument to the account balance. It should also increment the variable holding the number of deposits. withdraw   a virtual function that accepts an argument for the amount of the withdrawal. The function should subtract the argument from the account balance. It should also increment the variable…

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Exercise on class inheritance in C++. General requirements: • All data members must be declared as “private” • No global variable is allowed to be declared and used (constants are ok) • Methods within the class and the requested functions cannot have “cin” or “cout” but it should make use of parameters and return value instead unless it is stated explicitly. • “cin” and “cout” should be used in main() or any testing functions • Please make sure that you clearly show how the C++ class, its methods and all the functions are being called and print out its return value and its results properly       Please answer the following questions. 1. Define a class named “BooleanVariable” that manages a variable name (string) and a boolean value (true or false). It should not have default constructor. The class must at least provide the following methods: - toString() method that can return a string in the following format:           variable-name(variable-boolean-value) such as isSuccessful(true) -…

What do you call the technique that inserts an object to a function that can replicate the behavior of the object instead of merging objects with different classes?    A. Polymorphism with an Object B. Abstraction C. Inheritance D. Encapsulation

Answer this in C++: In the Student.cpp file and Student.h file, build the Student class with the following specifications: Private data members string name - Initialized in default constructor to "Louie" double gpa - Initialized in default constructor to 1.0 Default constructor Public member functions SetName() - sets the student's name GetName() - returns the student's name SetGPA() - sets the student's GPA GetGPA() - returns the student's GPA Ex. If a new Student object is created, the default constructor sets name to "Louie" and gpa to 1. The output of GetName() and GetGPA() before and after calling SetName("Felix") and SetGPA(3.7) is: Louie/1 Felix/3.7 main.cpp #include <iostream> #include <vector>   #include "Student.h" using namespace std;   int main() {     Student student = Student();     cout << student.GetName() << "/" << student.GetGPA() << endl;       student.SetName("Felix");     student.SetGPA(3.7);     cout <<…

This lab must be done in C++ Assignment: In cryptography, encryption is the process of encoding a message or information in such a way that only authorized parties can access it. In this lab you will write a program to decode a message that has been encrypted.  Detailed specifications: Define three classes. Each one should be in a separate file. You can choose to define the class and its functions inline, all in a header file, or have a .h and .cpp file for each class. Abstract base class with the following: A variable to hold an encrypted message. This variable should be a string which is initialized in the constructor. A status variable that will tell whether the message was loaded successfully. A constructor that receives one parameter: a string variable with a file name and uploads its content to the string variable that is supposed to store it. A pure virtual function called decode. This function will be defined in derived classes. A function that prints the message on the…