What problem may arise if use abstract class functions for polymorphism O O O O All classes are converted as an abstract class Derived classes can't redefine the function The derived class must be of abstract type All the derived classes must implement the undefined functions
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- Breify write Types of anonymous inner class and its advantage with example or syntax-Interface IResearch Scholar has two methods public void teaches (String str) and public void studies (String str). - Define classes JuniorRS and SeniorRs such that JuniorRS implements IResearchScholar and SeniorRS extends JuniorRS. - Class InterAbstrTest extends SeniorRS, and has the main method. An object of JuniorRs invokes the method studies, and an object of SeniorRS invokes methods studies and teaches.Association Relationships in Java Using the revised UML Class diagram Resto Fun Final i posted, continuedeveloping the Resto Fun system by modifying class definitions Create an Order class to break the Many-To-Many relationship between Customer and Item. Thisis a Relationship Class, a class that contains information on the association between to classes.Implement the relationship WaitsOn between Waiter and Customer, knowing that therelationship indicates that this is a One-to-Many relationship mandatory in both ends, i.e., awaiter must wait on a customer and a customer must be waited on by a waiter.Implement the relationship Orders between Customer (Table) and Item, another One-to-Many,since there are many Items a Customers can order, but each Item ordered is for one customeronly.Implement the Add relationship between Order and Item. Include a method to assign the Orderto a Customer before you start adding Items to the Order! There is enough information now to implement the…
- array of Payroll ObjectsDesign a PayRoll class that has data members for an employee’shourly pay rate and number of hours worked. Write a program withan array of seven PayRoll objects. The program should read thenumber of hours each employee worked and their hourly pay ratefrom a file and call class functions to store this information in theappropriate objects. It should then call a class function, once foreach object, to return the employee’s gross pay, so this informationcan be displayed.1- A complex number has the form a+bi , can be expressed as theordered pair of real numbers (a,b). The class represents the real andimaginary parts as double precision values.Provide a constructor that enables an object of this class to beinitialized when it is instantiated. The constructor should containdefault values.Provide Public member functions for each of the followingarithmetic’s functions (addition – subtraction – multiplication –division), a complex absolute value operation, printing the number inthe form (a,b), printing the real part , printing the imaginary part andfinal overload the == operator to allow comparisons of two complexnumbers.Include any additional operations that you think would be useful fora complex number class.Design, implement, and test your class.Object Oriented Programming Answer the following questions to assess your learning for const keyword in classes Q2. Can a non-constant member function of a class access constant data member of same class? Answer: Reason:
- PurposeTo review abstract classes and polymorphismDirectionsThe total cost of a group of items at a grocery store is based on the sum of the individual product prices and the tax (which is 5.75%). Products that are considered “necessities” are not taxed, whereas products that are considered “luxuries” are. For this practice problem you will need to download Shopping Trip Starting Code.zip from Pilot.The Product class is abstract, and it has a method called getTotalPrice. Your task is to create two subclasses of Product: NecessaryProduct and LuxuryProduct and implement the getTotalPrice method in each of these classes appropriately. Then modify the driver program to instantiate four…Object passing checklist1. Go over each member function and add the const keyword after their declaration ifthey do not modify any of the class' member variables.2. When accepting objects as parameters, prefer to pass them by reference. Add areference declarator (&) before the identifier name of an object parameter.3. If the member function does not modify the parameter, make the parameter constantby using the const keyword. apply the Object Passing Checklist. Modify food.h and volunteer.h to useobject references. Add const and & keywords in the appropriate places of the code.How we can access protected data members of a class without the use of public or private functions? Explain with code
- The Critter class is a base class with some basic functionality for running simulations of different kinds of critters. Critters can move, act, and remember their history. A typical simulation contains a number of critters of different types. In each step of the simulation, the act member function will be called on each critter. Define a class Sloth derived from Critter that simulates a sloth. Sloths alternate between eating and sleeping. Add the word "eat" or "sleep" to the history each time the act function is called. The implementation of the Critter class is not shown. Complete the following file: sloth_Tester.cpp #include <iostream>using namespace std; #include "critter.h" /**A sloth eats and sleeps.*/class Sloth : public Critter{public:Sloth();. . .private:. . .}; Sloth::Sloth(){. . .} void Sloth::act(){if (...) {add_history("eat");...}else{add_history("sleep");... }} int main(){Sloth sloth;sloth.act();cout << sloth.get_history() << endl;cout <<…What is the difference between equals() and == ? == looks to see if they are identical objects whereas equals() matches the content of the objects. equals() looks to see if they are identical objects whereas == matches the content of the objects. equals() and | == are used to match the content of objects, so no difference. equals() is used to match string objects whereas == is used to match all objects. O O O ODefine a class called student that has thefollowing data members: - int student number- string student name- double student averageThe following member functions:- Constructor that initialize the datamembers with default values. - set and getfunctions for each data member- Print function to print the values of data members.
