Object in C++

Object in C++
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Written by Sagar RabidasFebruary 1, 2022
9 min read
C++
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Techiio-author
Sagar Rabidas

Software Developer

Let's start the discussion on Object in C++

About Object in C++

C++ is an object-orientated programming language; the whole thing in its miles correlated with the magnificence and item. The elegance will correspond to the blueprint of something similar to the real-lifestyles entity, and it'll outline it. The object may be taken into consideration because of the actual actual-existence entity of the blueprint. An item plays a vital role within the c++ language; it will likely be used almost everywhere whilst programming. Everything in c++ performs around the object; consequently, it is necessary to understand the item in c++.

How to Create an Object in C++?

Before we create a real item, it's far necessary to have its elegance be already created. As cited above, a class is sort of a blueprint, and an item will be instantiated using that elegance. A category will define what's going to be there in and for the item. The magnificence defines the two most important things. First is the attributes or an issue that may be expressed as some quantity or something; it's miles known as a statistics member in the c++ analogy. The second thing described can be of a few forms of verb or motion or something we will perform; that is called a member function. The member function will act upon the statistics participants described in a category.

Now we will see how can we create an object in C++.

First, Let’s see the example where we will define the simple class.

#include <iostream>
using namespace std;
class Cellphone
{
private:
string brandName = "Samsung";
string model = "Galaxy";
public:
void details()
{
cout << "cell phone details are: " << endl;
cout << "Brand Name: " << brandName << endl;
cout << "Model Name: " << model << endl;
}
};

As can be seen, for example, we have defined a class with the name Cellphone.

Let’s create an object of this class; an object is an actual instantiation of a class. Below is an example of creating an object. Creating an object of a class is very simple.

int main()
{
Cellphone obj; //defining an object of type Cellphone
return 0;
}

The magnificence is a consumer-defined data type, and in our instance, it's far a cellular telephone. As you may see, the syntax of defining an item is simple in a way. It begins with the name of the elegance for which we're growing an object, followed via the name of an item that is of personal desire. In this example, we've got defined the item of sophistication mobile phone with the name as an obj in the fundamental method. We also can define the object everywhere else within the software following the scope.

Properties of an Object in C++

Inside the above segment, we stated that we outline matters while defining a class; the primary one is the attributes. These attributes or values declared in particular in magnificence are referred to as “properties”. Every class or object will have corresponding residences associated with it. In our instance of sophistication cellular phone, we already have described residences as brand name and version. The properties may be associated with the class; this makes it easy to understand the code.

Let’s add one more property named cell in our example.

class Cellphone
{
private:
string brandName = "Samsung";
string model = "Galaxy";
int cellNo = 123;
public:
void details()
{
cout << "cell phone details are: " << endl;
cout << "Brand Name: " << brandName << endl;
cout << "Model Name: " << model << endl;
}
};

Methods of an Object in C++

The second element which we declare in class is techniques. Something that relates to movement or pastime may be described inside the techniques of the magnificence. In our example, we have defined one method known as info. It’s a public approach that prints the info of the cellular telephone. Strategies are not anything but features that can be defined in a class. Strategies are used to perform actions in particular associated with magnificence. We can carry out anything as in step with requirements in the techniques. The class strategies can get the right of entry to the general public as well as privately described records members.

Let’s add one more method to our example. This method will display the cell number of the Cellphone.

#include<iostream>
using namespace std;
class Cellphone
{
private:
string brandName = "Samsung";
string model = "Galaxy";
int cellNo = 123;
public:
void details()
{
cout << "cell phone details are: " << endl;
cout << "Brand Name: " << brandName << endl;
cout << "Model Name: " << model << endl;
}
void cellNumber()
{
cout << "Cell Number: " << cellNo << endl;
}
};

We have added one new method, cellNumber(). This method will display the cell number on the screen. As we have declared an object already, we will call both the methods and will see the output. Calling the method using the object is an easy task.

int main()
{
Cellphone obj; // defining an object of type Cellphone
obj.details(); // call method details() of class
obj.cellNumber(); // call method cellNumber() of class
return 0;
}
Output:
cell phone details are:
Brand Name: Samsung
Model Name: Galaxy
Cell Number: 123

C
C++
Object in C++
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