Relationship between Virtual Functions, Pure Virtual Functions and Abstract Classes in OOP explained
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- Опубликовано: 30 июн 2024
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In this Object-Oriented Programming course, I'm explaining the relationship and purpose of virtual functions, pure virtual functions, and abstract classes.
C++ Virtual functions are functions defined in the base class and redefined in the derived class, whose main purpose is achieving runtime-polymorphism. Virtual functions are defined with the "virtual" keyword in the base class. You can find a detailed explanation and an example in this video, and I'll also show you how the runtime polymorphism achieved by using virtual functions looks like.
Pure virtual functions in C++ (abstract function) in C++ is a virtual function for which we don't write implementation in the base class, but we only declare it. In order to declare a pure virtual function, you need to assign 0 in the declaration
Abstract class in C++ is a class that has at least one pure virtual function. The classes which inherit the abstract class must provide a definition for the pure virtual functions, otherwise, they would be abstract themselves and you wouldn't be able to instantiate them.
The main purpose of an abstract class is to provide an appropriate base class from which other classes can inherit.
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Contents:
00:00 - Into
01:21 - Virtual Functions
12:21 - Pure Virtual Functions and Abstract Classes
17:28 - Polymorphism example
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Accordion compositions I like: bit.ly/compositionsILike
My favorite composition (The Danube Waves): bit.ly/TheDanubeWaves
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📚 Learn how to solve problems and build projects with these Free E-Books ⬇️
C++ Lambdas e-book - free download here: bit.ly/freeCppE-Book
Entire Object-Pascal step-by-step guide - free download here: bit.ly/FreeObjectPascalEbook
🚀📈💻🔥 My Practical Programming Course: www.codebeautyacademy.com/
Experience the power of practical learning, gain career-ready skills, and start building real applications!
This is a step-by-step course designed to take you from beginner to expert in no time!
💰 Here is a coupon to save 10% on your first payment (CODEBEAUTY_YT10).
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Finally someone who explains things as simple as they are and does not complicate them. Thanks
Thank you so much for this video, I just got my first tech job as a C++ developer, and the only C++ questions during the interview were about virtual functions, so you helped me get the job!
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Thank you for teaching the world C++ in logical, bite-size chunks! I am a longtime C programmer and am just getting up to speed on C++. Your course is helping me do that with minimum effort. I was prompted to leave a comment because I too played the accordion when I was young and I too miss playing it!
YOU ARE AN AMAZING TEACHER. I dont need to check for someone else's tutorial. I am always sure that your tutorial is all I need to understand OOP.
Thank you Sensei! You taught me passion, patience, precision, peace and Abstract Classes. 🙏 🙇
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This teacher has a great art of simplifying things such that even a new student is able to take out the core meaning from her session. Good Job teacher
Thanks a lot for this! I watched this video about an hour before my exam and it helped me do what I was supposed to do. Everything's clear and concise. You're a brilliant teacher!
the notation used in 06:44 Instrument* i1 = new Accordion( ); it is also used in linked list as Node* newNode = new Node( );
but I do not understand why this is done in this way, any help? thanks!
thanks teacher Saldina!
Saldina, thanks for your videos. I've been trying to learn c++ for so long, but always get deterred and bored. You present c++ in a consumable format. So I'm finally learning it. :)
Grateful for your work! 👏🏻👏🏻👏🏻
Much appreciated! 🙏💙
your way of teaching also like pure virtual function forces me to understand the topic easily.😁thank you so much.
I must say, I'm so glad I found this video. I was having a really hard time understanding the concept of virtual functions for months. This demotivated me and caused me to take a long break from learning C++. However, after watching YOUR explanation of it, I actually understand the concept now and the purpose of using it. I've had more confidence in learning the language since then. Thanks!
Welcome back after a long break. You are amazing teacher.
Your way of teaching is very educational!!! Thank you for this chapter.
I watched many c++ tutorials and this was the first video I watched that I allowed me to understood this concept! Thanks!
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Watched so many tutorials about virtual functions. None of them was this good. Awesome example for virtual functions
Thanks! Your channel is so helpful!!
wow this video clear out all of my confusion related to the virtual function.
thanks a lot for that.
Excellent lesson. Your teaching is concise and refreshing.
This helped me alot to understand these. Thank you.
The way you teach c++ makes it more simple... Nice work ma'am.
Thank you for sharing the accordion story!
Phenomenal teaching, thank you for explaining it so clear!
As an electonics engineering student, I love u r tutorials. Thanks for your nice explanation. greetings from Turkey :)
The pacing in this video is great! Will you consider doing more in-depth videos about C/C++ internals?
Yes, absolutely! Thank you! Glad you enjoyed it! 🤗
Thanks for making such a clear explanation to the virtual and pure virtual function
I really like your teaching style. Your explanation was awesome .
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You made it so simple. Thank you 😊
Your channel is a goldmine of knowledge thank you so much
Very good examples to explain the concept.
Is it just me or the word harmonika itself is already music to my ears. Just so cute🥺.Thanks for sharing!
Ya, I used to play Bassoon in school for a while, and I get nostalgic for that from time to time like when I hear some music with a prominent bassoon part.... Thank you for sharing about playing the accordion!
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love your videos . they are pretty specific . thank you
Clear, informative and gorgeous videos. Many thanks for amazing C++ tutorials dear Saldina, greetings from Turkey 👍
The accordion choices are great! The hungarian čardaš remembered me about a passage of Brahms' Hungarian dance n°4
Thanks for sharing the accordion link with the Just Duet channel. It was very amusing to hear the "Super Mario Bros" and "Still Dre" songs. I chuckled a bit seeing how straight their faces looked as they played.
I hope you'll continue with your passion in playing the accordion, it sounds like a wonderful instrument meant for a wonderful person.
We want that video of Beauty (Literally) playing Accordion right now.
Great explanation btw
Thank u so much for this great explanation!
First time I see you getting so emotional.
Sometimes I get emotional like that. And tears just come up from my eyes without noticing.
Thank you for the video. You explained it so well. I am learning this on my c++ course at university and this is really helpful!
I am just fallen in love the way you teach and your explanation
Thank you for another great video. Just for the clarification, please explain the difference between using, Instrument* i1= new Accordion(); and Instrument* i1= new Instrument(); in this situation.
Hi, do you know why did she use "new"?
The accordion nostalgia bit was a nice touch.
Looking forward to creating a concert in C++. Instrument class example 👍
incredible playlist
You are a great teacher. Thank you.
thx very much this video really helped me alot .. your videos are really easy to understand and very helpful
Nunca había aprendido tantas cosas en tan poco tiempo eres una excelente maestra 😉. Saludos desde Lerdo, Durango. Mx.
I Played Piano in music school for 10 years (6 years as a main intrument, 4 years as a secondary instrument) and oboe (4 years in secondary school).
I finished artistic profile in hight school (graphics) and then I spent 14 years at the University as a student and PhD at physics and engineering. And finnaly since 2014 I'm an embedded programmer.
My friend played accordion in music school and we met again at the same university - After PhD he became automatization engineer.
the nostalgic accordian part Was really adorable , keep it up mam , u teach very Well , may god reWard u
Amazing explanation. It's a tough subject for understanding but....you saved my night.
its very helpful ... explained in one of the best way.....
You made this easy to understand .Thank you :)
I'm new to classes and objects and your videos are very like very helpful
Today example taken to describe is awesome.
Thank you saldina your videos are helping me a lot in my university works.☺
what, i was scared of oop because of what they all talk about. i think you make it very easy and understandable. thank you so much! also i really like the shirts you wear
Thanks Saldina...It was a great video ❤❤
I am an Opera Singer and also a voice teacher and a choir director. When i was young I was studying programming and chemistry which i never finished. Due to Covid I returned to study programming again, but it has been hard on me. Because I am not so young, although your videos and explanations have helped with my understanding of how the process should be done. I wish all teachers were helpful as you are.
thank you again.. so clear and well explained..
.. btw, I'd LOve to see you playing the accordion!
Such a clear explanation, and u have a very nice smile. god bless U....
such a clear and smart explanation. thanks so much
Thanks!!! Excellent explanation
Crystal clear topic thanx madam...
2 years down the line but video it's very lively like you're doing it today. We will forever miss this lectures
In Kenya the instrument is used in folksongs
Thank you so much. Good explanation
Thank you so much for your video!
Like the Fleetwood Mac song goes .... You make learning Fun!
Many Thanks.
Thanks. For making things clear
Svaka čast, prepametna i prelepa Mostarko
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Finally 😍I was waiting for oop tutorials
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You are currently the best c++ teacher on RUclips University
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Most convinent one....thanks for making this video.
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thank you for all your efforts.
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You explained very well. Despite the explanation was in English I understood everything and you cleared up any doubts I had. Thank you.
Very clear explanation, thank you a lot :)