When an Object in C# Is Serialized What Is It Converted to

C++ Classes and Objects

The main purpose of C++ programming is to add object orientation to the C programming language and classes are the central feature of C++ that supports object-oriented programming and are often called user-defined types.

A class is used to specify the course of an object and it combines data representation and methods for manipulating that information into ane neat package. The data and functions within a course are chosen members of the form.

C++ Class Definitions

When yous ascertain a class, you define a blueprint for a information type. This doesn't really ascertain any information, but it does define what the class proper noun means, that is, what an object of the class volition consist of and what operations can be performed on such an object.

A class definition starts with the keyword class followed by the course proper noun; and the grade body, enclosed by a pair of curly braces. A grade definition must be followed either past a semicolon or a listing of declarations. For example, we defined the Box data blazon using the keyword course as follows −

class Box {    public:       double length;   // Length of a box       double latitude;  // Breadth of a box       double superlative;   // Height of a box };

The keyword public determines the access attributes of the members of the class that follows it. A public member tin be accessed from exterior the grade anywhere within the scope of the course object. You lot can as well specify the members of a class as individual or protected which we will discuss in a sub-section.

Define C++ Objects

A class provides the blueprints for objects, so basically an object is created from a class. We declare objects of a course with exactly the aforementioned sort of announcement that we declare variables of basic types. Post-obit statements declare two objects of class Box −

Box Box1;          // Declare Box1 of blazon Box Box Box2;          // Declare Box2 of type Box

Both of the objects Box1 and Box2 will have their own copy of data members.

Accessing the Data Members

The public information members of objects of a class can exist accessed using the direct member access operator (.). Let us effort the following example to make the things articulate −

#include <iostream>  using namespace std;  class Box {    public:       double length;   // Length of a box       double latitude;  // Breadth of a box       double height;   // Peak of a box };  int main() {    Box Box1;        // Declare Box1 of type Box    Box Box2;        // Declare Box2 of type Box    double volume = 0.0;     // Store the volume of a box hither      // box 1 specification    Box1.acme = 5.0;     Box1.length = half-dozen.0;     Box1.breadth = 7.0;     // box 2 specification    Box2.height = 10.0;    Box2.length = 12.0;    Box2.breadth = 13.0;        // book of box i    volume = Box1.acme * Box1.length * Box1.latitude;    cout << "Volume of Box1 : " << volume <<endl;     // book of box 2    book = Box2.height * Box2.length * Box2.breadth;    cout << "Volume of Box2 : " << book <<endl;    return 0; }

When the above lawmaking is compiled and executed, it produces the following result −

Book of Box1 : 210 Volume of Box2 : 1560

It is important to note that private and protected members can not be accessed directly using direct member access operator (.). We will learn how private and protected members tin can exist accessed.

Classes and Objects in Item

And so far, you lot take got very basic idea about C++ Classes and Objects. There are further interesting concepts related to C++ Classes and Objects which we will discuss in diverse sub-sections listed below −

Sr.No	Concept & Description
one	Form Member Functions A fellow member role of a class is a function that has its definition or its prototype inside the class definition like any other variable.
ii	Grade Access Modifiers A class member tin can be defined as public, private or protected. Past default members would be assumed every bit private.
3	Constructor & Destructor A course constructor is a special function in a class that is called when a new object of the class is created. A destructor is also a special function which is chosen when created object is deleted.
4	Copy Constructor The re-create constructor is a constructor which creates an object by initializing it with an object of the same class, which has been created previously.
5	Friend Functions A friend office is permitted total access to private and protected members of a class.
6	Inline Functions With an inline office, the compiler tries to expand the lawmaking in the body of the role in identify of a call to the function.
vii	this Pointer Every object has a special pointer this which points to the object itself.
eight	Pointer to C++ Classes A arrow to a class is washed exactly the same way a pointer to a construction is. In fact a form is really just a structure with functions in it.
9	Static Members of a Course Both data members and function members of a class can be declared equally static.