What are two reasons that you might want to use the const keyword in a class definition (.h file)? (Choose only 2) a. To create a global variable (like pi) that will be accessible to all classes and files in your program. O b. To modify the object itself to make it so that any instances of it will be constant in all contexts. O c. To make it so an object passed into a function cannot be modified within that function. O d. To make a function able to be called by constant objects (make it constant qualified)

What are two reasons that you might want to use the const keyword in a class definition (.h file)? (Choose only 2) a. To create a global variable (like pi) that will be accessible to all classes and files in your program. O b. To modify the object itself to make it so that any instances of it will be constant in all contexts. O c. To make it so an object passed into a function cannot be modified within that function. O d. To make a function able to be called by constant objects (make it constant qualified)

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Research assistants provide support to professionals who are conducting experiments or gathering andanalyzing information and data. Suppose you are working as RA (research assistant) with a Professor who isworking on a project and evaluating complex mathematical equations. Your duty is to assist him, so in thisregard he has assigned a task to you. Your task is to write a oop c++ program to create a class named equation which will have the data members a, b and c which are the coefficients of the quadratic equation. The class will have two more data members namely proot and nroot which stand for the positive root and negative root of the equation. Suppose that variables a, b and c are integers. Where proot and nroot are floats. Input Function to get values of a, b and c Then design a friend function which will determine the proot and nroot of the equation. Create another friend function which will display the values of proot and nroot.
Problem Write a C++ program that declares a class named Point to model a point. A point is represented by its coordinates x and y. Separate the class definition from declaration within the same file. Do the following tasks to accomplish the program. 1. Define several constructors for the class as follows. Use constructor initializer and default arguments whenever possible. a. A constructor that accepts two parameters to initialize the coordinates x and y respectively. b. A copy constructor that accepts another Point object. Use a constructor initializer to invoke constructor (a) c. A default constructor that sets the coordinates x and y to 0. Use a constructor initializer to invoke any of the above constructor s. 2. Define a constant method named print() that prints the coordinates x and y of the point. Explain what is a constant method and what is used for? Why is this method better to be declared as a constant method? Write your answers as comments in the program. 3. Define a method…
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Write in C++ Language. (Employee Record): Create a class named 'Staff' having the following members: Data members - Id – Name - Phone number – Address - AgeIt also has a function named 'printSalary' which prints the salary of the staff.Two classes 'Employee' and 'Officer' inherits the 'Staff' class. The 'Employee' and 'Officer' classes have data members 'Top Skill' and 'department' respectively. Now, assign name, age, phone number, address and salary to an employee and a officer by making an object of both of these classes and print the same.
I have the basis of a program that works as an inventory, it reads the contents of a file and displays them and their quantity in three places, listed below are the things that I need to add to the program below. Provided is the current code. 1) Convert your structure into a class. For this exercise, you can leave the data as public (otherwise you would have to change the input and output functions). 2) Write a member function show_all that prints all the information for one record - name, cost, markup, and the three inventory numbers. 3) Add a user option S that lets the user see all the information for all the items in the inventory, using the show_all member function. Print a header so the user knows what each column means, and format the output to appear in columns. Hint: do a setwidth() before *each* cout. Pick widths that make sense for name, cost, markup, and the three inventory numbers. Contents of the file: Contents of Inventory.txt Red delicious apples1.00 25 6 8…
Example 1: Define a function that takes an argument. Call the function. Identify what code is the argument and what code is the parameter.Example 2: Call your function from Example 1 three times with different kinds of arguments: a value, a variable, and an expression. Identify which kind of argument is which. Example 3: Construct a function with a local variable. Show what happens when you try to use that variable outside the function. Explain the results.Example 4: Construct a function that takes an argument. Give the function parameter a unique name. Show what happens when you try to use that parameter name outside the function. Explain the results.Example 5: Show what happens when a variable defined outside a function has the same name as a local variable inside a function. Explain what happens to the value of each variable as the program runs.The code and its output must be explained technically whenever asked. The explanation can be provided before or after the code, or in the…
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Is that right?For functions that are flexibly bound, you need pointers or references.
1. Short questions: a. What is the difference between having a function return type being "const dataType &" and it being "dataType&"? b. When is it necessary to make a function or a class a friend of another class? c. List all who can access: the private member of a class protected member of a class public member of a class d. What is difference between static data and a regular data of a class?
Hi, I am having trouble with this homework question for my C++ course 1. Implement a Student class. a. Create a class Student with the following private data members:1. name2. exam_1 grade3. exam_2 gradeb. Create all appropriate accessor and mutator functions.c. Assign appropriate access modifiers to insure encapsulation.d. Add a private calc GPA() function that calculates and returns the GPAbased upon the two exam grades.e. Add a public getGrade() function that: 1. Obtains the GPA from the private calc GPA() function.2. Returns a letter grade based upon the numerical GPA value.90 to 100 = A80 to 90 = B70 to 80 = C60 to 70 = D0 to 60 = F f. Test all functions use following main.int main(){Student a;a.setName("David");a.setExam1(90);a.setExam2(80);cout<<a.getName()<<endl;cout<<a.getExam1()<<endl;cout<<a.getExam2()<<endl;cout<<a.getGrade()<<endl;}