I am not sure how to ask this question, but I need help in understanding the usage of :: when grabbing a member variable in a class? Rather than just typing that specific member variable instead? For Example: In Hpp file #include using namespace std; class class_name{ void add_name(name); string variable_name; }; In CPP file: void add_name(string name){ class_name::variable_name = name; }

I am not sure how to ask this question, but I need help in understanding the usage of :: when grabbing a member variable in a class? Rather than just typing that specific member variable instead? For Example: In Hpp file #include using namespace std; class class_name{ void add_name(name); string variable_name; }; In CPP file: void add_name(string name){ class_name::variable_name = name; }

C++ Programming: From Problem Analysis to Program Design

8th Edition

ISBN:9781337102087

Author:D. S. Malik

Publisher:D. S. Malik

Chapter10: Classes And Data Abstraction

Section: Chapter Questions

Problem 21SA

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Previous Exercise to help with answering the question which is below | Write the header file (.h file) of a class Counter containing: A data member counter of type int. A data member named counterID of type int. A static int data member named nCounters. A constructor that takes an int argument. A function called increment that accepts no parameters and returns no value. A function called decrement that accepts no parameters and returns no value. A function called getValue that accepts no parameters and returns an int. A function named getCounterID that accepts no parameters and returns an int. #include<iostream>using namespace std; class Counter{private:int counter;int counterID;static int nCounters;public:Counter(int c);void increment();void decrement();int getValue();int getCounterID();}; ----------------------------------------------------------------------- ANSWER THIS QUESTION!In C++ Write the implementation (.cpp file) of the Counter class of the previous exercise.The…
Regarding the code below, how would I write code to declare all class member functions in a separate "Pet.h" file? All class member functions need to be declared in the Pet.h header file and defined in the Pet.cpp file (below). #include <iostream> #include "Pet.h"using namespace std; //Class Definitionclass Pet { private: //Variable declarationstring Name, Type;int LevelOfHungriness;public: //Default ConstructorPet(){Name ="Buddy";Type ="dog";LevelOfHungriness=CONTENT_HUNGRY;}//Parametrized constructorPet(string n, string p, int l){Name =n;Type =p;LevelOfHungriness=l;}//Definition of TimePasses functionint TimePasses(){if(LevelOfHungriness < VERY_HUNGRY){LevelOfHungriness++;}return LevelOfHungriness;}//Definition of FeedPet functionint FeedPet(){LevelOfHungriness = NOT_HUNGRY;return LevelOfHungriness;}//definition of PrintInfo function void PrintInfo(){cout<<"A " << Type << " named " << Name << " who is hungry level " <<…
In C++ compile a program to fufill purpose mentioned below, not copied from internet please. Write a class named Employee that has the following member variables: name. A string that holds the employee’s name. idNumber. An int variable that holds the employee’s ID number department. A string that holds the name of the department where the employee works Position. A string that holds the employee's job title. The class should have the following constructors: A constructor that accepts the following value as arguments and assigns them to the appropriate member variables: employee’s name, employee’s ID number, department, and position. A constructor that accepts the following values as arguments and assigns them to the appropriate member variables: employee’s name and ID number. The department and position fields should be assigned as empty string (“”). A default constructor that assigns empty strings (“”) to the name, department and position member variables, and 0 to the…
Can I get help writing this with these parameters To give you an idea of the general criteria that will be used for grading, here is a checklist that you might find helpful: Executes without crashing Appropriate Internal Documentation Pet Class Data members: name, type, weight Constructor/destructor Getters/setters as appropriate Main: The following items must be implemented in main() or by functions called from main() They must not be implemented in the Pet class Prompts user for the number of pets Creates the pet array using dynamic memory allocation Dynamically creates a pet object Generates a random weight (between 1-100 inclusive) for each pet Seed is 100 Prints contents of array as illustrated in diagram De-allocates memory (both the array and the contents of the array) before exiting Style: Modular design, no global variables, etc.
a) Write the declaration for class B. The members of the class should be as follows: m, an integer. This variable should not be accessible to code outside the class or to any class that extends class B. n, an integer. This variable should be accessible only to classes that extends class B or are in the same package as class B. setM, getM,setN, getN. These are the mutator aand accessor methods for the member variables m and n. These methods should be accessible to code outside the class. calc. This is a public abstract method. b) Write a declaration for class D, which extends class B. The members of the class are as follows: q, a double. This variable should not be accessible to code outside the class. r, a double. This variable should be accessible to any class that extends class D or is in the same package. setQ, getQ,setR, getR. These are the mutator aand accessor methods for the member variables q and r. These methods should be accessible to code outside the class. Calc, a…
Modify the Loan class definition in the program ex91.cpp to include a new class called Bank in its definition as described below. // This will go to Loan.h file class Loan { public: Loan( ); Loan(Bank bank, ID id, float amount, float rate, int term); void set( ); float payment( ); void display( ); private: Bank bank; ID id; // assume an unique integer in three integer parts float amount; // $ amount of the loan float rate; // annual interest rate int term; // number of months, length of the loan }; The Bank class is defined as: // This will go to Bank.h file class Bank // Bank class definition { public: Bank( ); Bank(int bank_ID, CONTACT phone, CONTACT fax); private: int bank_ID; // 4 digit integer Contact phone; // object three integer pieces, # # #, # # #, # # # # Contact fax; // object three integer pieces, # # #, # # #, # # # # }; The class Contact has three integer parts, for Example: part1: 828,…
Can you please help me write this in C++ with this implemented with in it Excutes without crashing Appropriate Internal Documentation Doctor class created Doctor.h Doctor.cpp Contains data for no more than 3 patients Patient class created Patient.h Patient.cpp Contains data for up to 5 cholesterol readings Menu Add: Successfully adds a patient record Successfully adds cholesterol readings List: Lists all the data Quit: Quits Loops until the user selects quit Style: Data members are correctly declared Member functions exist in the correct classes Overall style is appropriate (no globals unless constants, modularity, uses a vector, adheres to the principle of least privilege, etc.) Appropriate formatting of output
Hello, I am having trouble with this homework assignment for C++ (See below for the output) 2. Implement the following: a. A class named Food. 1. dynamic data member: name 2. accessors and mutators 3. the big three b. A class named Cake that inherits from Food. 1. dynamic data member: topping (type of icing such as chocolate) 2. accessors and mutators 3. the big three c. Create an object of type Food and output its data member. d. Create an object of type Cake and output its data members. e. Test all inherited functions in main. (Cannot change the given int main. Any alteration is not accepted) int main() { cout << endl; Food f1("Bread"); f1.output(); cout << "\nf2: Copy Constructor" << endl; Food f2 = f1; f2.output(); cout << "\nf3: Assignment Overload" << endl; Food f3; f3 = f2; f3.output(); cout << "\nFood: Mutator" << endl; f1.setName("Pizza"); f2.setName("Sandwich"); f1.output(); f2.output(); f3.output(); cout << "\nCake:\n" <<…
How would I fix this to get it looking like output #2? //Animal.cpp is the main function file of the Animal class//CSIS 112/B16 #include <iostream>using namespace std;//defining Animal classclass Animal {public://Name and age of classstring name;int age;//default contstructorAnimal() {name = "";age = 0;cout << "Invoking Animal 2 argument constructor?" << endl;}//virtual functionvirtual void move() {}//getter and setter functionsstring getName() {return name;}void setName(string n) {name = n;}int getAge() {return age;}void setAge(int a) {age = a;}};//Dog derives Animal publicallyclass Dog : public Animal {public://dogs constructorDog(string n, int a) {name = n;age = a;cout << "Invoking Dog constructor" << endl;}//implementing virtual functionvirtual void move() {cout << "I run" << endl;}};class Rabbit : public Animal {public:Rabbit(string n, int a) {name = n;age = a;cout << "Invoking Rabbit constructor," << endl;}~Rabbit() {cout…
This is my code in c++. When the chosen class is full I want the code to automatically assign it to the next available class (Economy). Also when the economy class is full I want the code to automatically assign it to the next available First Class seat. #include <iostream> using namespace std; void ShowInfo(); void printInfo(char input[9][4]); void DesiredRow(int row[2], char seat); int main () { int ROW = 9, SEATS = 4; int row[9]; char airchar[9][4]; char seat; string answer; string ticket; string name; string newanswer; for (int i = 0; i < ROW; i++) { for (int j = 0; j < SEATS; j++) { airchar[i][j] = '*'; } } cout << "Please enter your full name: " << endl; getline(cin, name); while ("Yes") { cout << " Do you wish to book a seat: " << endl; cout << " Yes or No: " << endl; cin >> answer;…
In a C++ program, create a class Named Student which can save student information containing Roll Number, First Name, Last Name, Student class, Marks (can be in points) and grade. Set default values for class members in default constructor. Initialize class and fill with user provided values. At last pass this class instance to a function named PrintData, which prints incoming information contained within student instance. Student Information to Store: Roll Number, First Name, Last Name, Student Class, Total Marks and Grade.Overload default constructor for the class created.Overload constructor with one integer argument which sets roll number value.Overload constructor with three arguments for roll number first and last name.Initialize student instance with default constructor, and print values on screen using PrintData function. Initialize student instance with overloaded constructor, and print values on screen using PrintData function.
IN C++, Create a class called Invoice that a hardware store might use to represent an invoice for an item sold at the store. An Invoice should include four pieces of information as instance variables - a part number (type String), a part description (type String), a quantity of the item being purchased (type int) and a price per item (double). Your class should have a constructor that initializes the four instance variables. Provide a set and a get method for each instance variable. In addition, provide a method named getInvoiceAmount that calculates the invoice amount (i.e., multiplies the quantity by the price per item), then returns the amount as a double value. If the quantity is not positive, it should be set to 0. If the price per item is not positive, it should be set to0. Write a test app named InvoiceTest that demonstrates class Invoice's capabilities.