C++ Interfaces

C++ Interfaces

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C++ is an object-oriented programming language that is viewed by many developers as the best programming language for creating large-scale applications. It is a superset of the C dialect. It was initially considered as a general-purpose programming language but it has evolved over course of time and now has object-oriented, generic, and functional attributes in addition to some low-level data manipulation. Now it has evolved into a multi-purpose language useful in many contexts but its key strength is a software infrastructure and resource-constrained applications.

C++ Interfaces

C++ interfaces are used to depict the behavior of the C++ class without executing specific usage of that class. C++ has no pre-existing concept of interfaces they are implemented using abstract classes. A class is made abstract by pronouncing at the slightest one of its basis as a pure virtual function. A pure virtual function is indicated by setting‟= 0” in its implications. This is done in order to provide an appropriate base class that can be inherited by other classes that are the purpose of an abstract class. Abstract classes cannot be utilized to instantiate objects and serve as they were as an interface. Endeavoring to instantiate an object of an abstract class causes an error in its compilation. In this way, in case a subclass of an abstract class ought to be instantiated, it must execute each of the virtual functions, which purposes that it aids the interface stated by the abstract class. If there is a failure of overriding a pure virtual function in a derived class, then there must be an error in the compilation in the attempt to instantiate objects.

If you were wondering whether you can create interfaces like HTML using C++ then the answer to your question is yes you can. Even though C++ was never intended to be that way the more separated the language is from the GUI the better. But if you want to create a C++ HTML Interface for any C++ program there are plenty of good and user-friendly tools for that. The same goes for building a graphical user interface in order to build a C++ graphical interface you have to use portable GUI Libraries like Qt, FLTK, and GTKmm, etc.

Why use Interfaces?

The most common error that programmers make during C++ programming is to use inheritance too much. C++ interface is Inheritance done correctly. The reason behind that is that the power of interfaces is able to handle objects of a different sort in another system as if they were the same sort. The reason interface is the better way to proceed forward in programming than inheritance is because of the inheritance functionality that makes it difficult to understand what a class does, to correct it, and confirm that the internal state of the objects cannot be destroyed by external methods. The need for this type of structure may not be clear in a small project but it becomes very obvious when the project grows big.

Design Patterns

The design patterns of C++ interfaces act as facilitators in any of the applications. Each pattern is associated with a unique capability to cater to the specific needs of customers.

1. Abstract Factory

This lets you deliver a group of closely related objects without indicating their concrete classes

2. Builder

This lets you develop complex objects step by step. The design permits you to deliver distinct sorts and representations of an object utilizing the same development code.

3. Factory Method

Gives an interface for making objects in superclasses but permits subclasses to change the sort of objects that will be created.

4. Prototype

This lets you duplicate existing objects without making your code dependent on their classes.

5. Singleton

This gives you a guarantee that a class has only one instance at the same time providing a global access point to this instance

6. Adapter

Allows objects that have non-compatible interfaces to work with each other.

7. Bridge

This lets you part a large object or a set of closely related classes into two isolated hierarchies- abstraction and implementation which can be created freely of each other.


Interfaces are greatly valuable in C++ programming. It is no coincidence that interfaces are valuable game-changing entities in C++ programming or for that matter any programming landscape. Using an interface, you can characterize a wide area of capabilities and after which you can execute the interface in a class.

At OdiTek Solutions, we have highly skilled C++ programmers who have an in-depth understanding of the C++ language and can help you to with your application or product development requirements. Reach out to us today to explore more about our offerings in C++, just drop an email to info@oditeksolutions.com

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C++ Development

C++ is one of the most popular object-oriented programming language that is used for multi-device and multi-platform enterprise-class large scale performance -driven application development. The C++ language combines increased capacity and optimal performance of software that is why it is widely used for building well-organized...


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