Functions in C++ always have return types O False O True private member can be accessed from main function O False O True Multiple inheritance is one type of inheritance O True O False
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- Computer Science c++ help comment code please. Complex has multiple parameters to overload i think. class Complex{public: Complex(); //There are no parameters because... Complex(double); //There is one parameter because... Complex(double, double);//There are two parameters because... double get_Real(); void set_Real(double); double get_Imaginary(); void set_Imaginary(double); friend ostream& operator << (ostream& out, Complex& r); //explain friend istream& operator >> (istream& in, Complex& r);//explainprivate: double real; double imaginary;}; ostream& operator << (ostream& out, Complex& r) //{ double a = r.get_Real(); double b = r.get_Imaginary(); if (a != 0)out << a; if (b < 0) out << "-" << abs(b) << "i"; if (b > 0 && b != 1) out << "+" << b << "i"; if (b == 0) out << "0"; if (b == 1 && a != 0) out << "+" <<…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) -…Classes define new types in C++. Types in C++ not only interact by means of constructions and assignments but also via operators. For example: int a=2, b=1, c; c = b + a; The result of variable c will be 3.Similarly, classes can also perform operations using operator overloading. Operators are overloaded by means of operator functions, which are regular functions with special names. Their name begins with the operator keyword followed by the operator sign that is overloaded. The syntax is: type operator sign (parameters) { /*... body ...*/ } You are given a main() function which takes a set of inputs to create two matrices and prints the result of their addition. You need to write the class Matrix which has a member a of type vector<vector<int> >. You also need to write a member function to overload the operator +. The function's job will be to add two objects of Matrix type and return the resultant Matrix. Input Format First line will contain the number of test…
- in C++, for classes with pointer member variables, you should include the copy constructor and the ____________________ in the class.State if true or false: Dynamic binding with virtual functions occurs only with pointers and referencesIn C++ please. This program is a two-part program. Both programs go together. Please do both parts: Part 1: 1) Create three files to submit: ItemToPurchase.h - Class declaration ItemToPurchase.cpp - Class definition main.cpp - main() function Build the ItemToPurchase class with the following specifications: Default constructor Public class functions (mutators & accessors) SetName() & GetName() SetPrice() & GetPrice() SetQuantity() & GetQuantity() Private data members string itemName - Initialized in default constructor to "none" int itemPrice - Initialized in default constructor to 0 int itemQuantity - Initialized in default constructor to 0 (2) In main(), prompt the user for two items and create two objects of the ItemToPurchase class. Before prompting for the second item, call cin.ignore() to allow the user to input a new string. Part 2: Please add the following program to part 1 in the answer. (1) Extend the ItemToPurchase class per the following…
- Create class Employee that has the following pieces of information called first name, last name, day off and salary. Write a C++ program to implement the following functions for three employees: 1- Constructor to initialize data members. 2- Set and get functions for data members 3- Operate decrement operator to decrement the salary when the employee has a day off. 4- Display the results using friend function called Display().In C++ implement the relational operators (<, <=, ==, !=, >, >=) in the Circle class in the code below, to order the Circle objects according to their radii. (written program should be one code). thanks #ifndef CIRCLE_H#define CIRCLE_Hclass Circle{public:Circle();Circle(double);double getArea() const;double getRadius() const;void setRadius(double);static int getNumberOfObjects();private:double radius;static int numberOfObjects;};#endifWrite a program in C++ that declares two classes. The parent class is called Simple that has two data members num1,num2 to store two numbers. It also has four member functions. The add() function adds two numbers and displays the result. The sub() function subtracts two numbers and display the result. The mul() function multiplies two numbers and display the result. the div () function divides two numbers and display the result. The child class is called Complex that overrides all four functions, each function in the child class checks the value of data members. it calls the corresponding member function in the parent class if the values are greater than 0. Otherwise it displays error message.
- In C++, all classes must be declared inside of the main function A) True B) FalseThis is an object oriented programming question The code should be in C++ language Create a class Student having a private data members S_ID, S_Name and S_CGPA. Now create a public member functions void getID(), void getName() and getCGPA() and finally to display all the data members, create a function void display(). In the main(), create an array of student class, size of the array should be taken from user at run time and call all the functions defined in the class. Sample Output: Student 1 Enter ID: 1 Enter Name: Ali Enter CGPA: 2.5 Student 2 Enter ID: 2 Enter Name: Ahmed Enter CGPA: 2.9 Student 3 Enter ID: 3 Enter Name: Zain Enter CGPA: 3.4 Student 1 informationID: 1 Name: Ali CGPA: 2.5 Student 2 information ID: 2 Name: Ahmed CGPA: 2.9 Student 3 information ID: 3 Name: Zain CGPA: 3.4using pointers or references to base classes to access virtual functions throughout a program's many implementations.