C++ Object Class Object Class

The object class in C++ is a user-defined data type that encapsulates data and functions into a single unit. It allows the programmer to create objects that can interact with each other to perform specific tasks.

Syntax

The syntax for creating an object in C++ is:

ClassName ObjectName;

Example

Here is an example of using an object class in C++:

#include<iostream>
using namespace std;

class Rectangle {
   private:
      int length;
      int width;

   public:
      void setLength(int l) {
         length = l;
      }

      void setWidth(int w) {
         width = w;
      }

      int getArea() {
         return length * width;
      }
};

int main() {
   Rectangle obj;
   obj.setLength(5);
   obj.setWidth(4);

   cout<<"Area of the rectangle is : "<<obj.getArea()<<endl;

   return 0;
}

Output

The output of the above code will be:

Area of the rectangle is : 20

Explanation

In the above example, we have declared a class Rectangle with two private data members length and width. We have also defined three public member functions setLength(), setWidth(), and getArea().

We have created an object obj of class Rectangle and used the setLength() and setWidth() functions to set the values of length and width to 5 and 4 respectively. Finally, we have used the getArea() function to calculate and print the area of the rectangle.

Use

The object class in C++ is used to define custom data types that can encapsulate both data and functions. It allows for better code organization and reusability. Object-oriented programming is a widely used programming paradigm in the industry, and knowledge of object classes is crucial for any C++ programmer.

Important Points

• An object class is a user-defined data type in C++.
• It encapsulates data and functions into a single unit.
• The syntax for creating an object is ClassName ObjectName.
• Object classes are used for better code organization and reusability.
• Object-oriented programming is a widely used programming paradigm in the industry, and knowledge of object classes is crucial for any C++ programmer.

Summary

The object class in C++ is a user-defined data type that encapsulates data and functions into a single unit. It is used to define custom data types that can interact with each other to perform specific tasks. The syntax for creating an object is ClassName ObjectName. Object classes are used for better code organization and reusability. Object-oriented programming is a widely used programming paradigm in the industry, and knowledge of object classes is crucial for any C++ programmer.