Virtual Functions in C++ | C++ Tutorials for Beginners #56
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- Опубликовано: 16 окт 2024
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Summary-
// As we have seen in tut55.cpp that BASE class pointer pointing to DERIVED class object can only access BASE class inherited members which is a default behavior.
// But if you want to change default behavior and want to access the members of derived class by a pointer pointing to derived class object then use virtual keyword in front of BASE class member function.
Exactly
but what if you have passed different arguments to the display function in both the class? its not working then.
If they contain exactly same fn (name and argument) then the BASE class pointer pointing to THE DERIVED class can call only BASE class fn.
To call the derived class fn we declare the BASE class fn virtual
@@shabbirhabib9447 different in what manner?
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This guy really deserves 100M+. Really the best RUclipsr. The way he teaches is wonderful. I am from Nepal 🇳🇵, heart this comment.
@THE Programming Fool! Wtf
😂😂😂 nice joke
Harry Bhai, i started learning C++ from this playlist on 12th October 2021, and today it is 24th December 2021. It is going to complete soon. Thank you so much for this course.🤩😇 Motivated++
how r u bro what is ur situvation now
i am first year cse student what about u
what uses did u get from this course
please reply it will be usefull for me bro
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@@sudheepro All the concepts of Object Oriented programming are covered in this course. Once you have completed this course, you will be able to switch to any other language which supports object oriented programming.
The topics are explained to the point, and in a very different manner than other tutorials. The examples given by Harry bhai are still fresh in my mind. ❤️
@@vikasrathore3955 bro operator overloading toh nhi hai isme
@@deepikakar5394 haanji.. operator overloading is missing in this course.
NOTE: You can also use "void virtual" instead of '"virtual void "
shukriya bhai jaan
Harry bhai...I have shared your channel to all my friends....I don't know why do you get such low views... ..bhai esa content to aajtak kisine nahi diya.....pura practical samjate ho aap....thank you soo.. much.....
You are the best teacher because you help to the poor people . You had made a lot of courses for us!
Thank you Bhai for making quality videos for us. I love your videos.
Great work Harris bhai, kindly also give the concept of Shallow copy vs Deep copy as this question was asked in an inteview on basic level of programming.
THANKS
Sir! Your channel is growing really fast
Yes, thanks a lot for all the love and support!
@@CodeWithHarry Thanks for providing quality Content
@@CodeWithHarry sir will you please make some more videos on android development please please bhaiya ji i m in class 8 and i am really interested in programming and also thank you very very much for such awesome and free content 👍😊.
@@CodeWithHarry Bro is topic pr vedio bnao
Social media app ko kis kis languages m likha gya h ye app working Kese krta h
Like WhatsApp m kya kya use huaa h
Button, icon, page, label, command, ....ect
abbbe par isse ye bhi poocho ki operator overloading kaha hai😭😭
i didn't find operator overloading in your playlist bro
No operator overloading in his playlist
Padhaya hai bhai
@@yogendranathsingh2576 video no. kya hai isme
yeaaa even i could'nt find. so i did refer to Simplilearn for operator overloading and its super easy!!
I am a chef and I want to change my job I like programing language.
Can I join software industry without doing diploma or degree courses...???
Just mark ur presence in coding platforms like codechef and try competitions try to get online certificates ..... And prepare small and right knowledgable resume for interview in any company.... ..
Finally Completed this series ! Harry Bhai - Ab taq ki yatra safal ! Bahoot Bahoot Dhanywaad ! Cheers & Peace !
I liked u r videos sir..... I just started to see u r first videos of c++. Iam glad to say that u r videos are awesome
Your teaching method is extra outstanding 🔥🔥🔥🔥
thank you so much you have cleared out my biggest confusion in cpp 😊
You Great sir, how simply describe everything ,loved your channel...I'm accessing this playlist from staring
Thank you sir, very helpful video God bless you,,.
with the pointer of base-type we can use functions of derived class if and only if the base function is virtual,
however, the derived variables won't change with pointer.
best explanation ever on the topic polymorphism.
Sir muze main function me derived class ke variable ko initialize karna hai to kya muze derived class ka pointer create karna padega?
Thank you so much Harry bhai 💗 virtual function clear ...
God bless you Harry bhai. You are helping us in a incredible way
Harry bhai super se bhi uper🤘🤘
1:11 literally jab mai easy hota hoon
Le harry bhai:
dehaan se sunna baat ko.
Question ?
Bro, as you have said in tut55.cpp, we can use derived class members if we use derived_class_pointer pointing to derived_class. (like base_class_pointer= &obj_derived), so why there is a need of "Virtual functions" to access derived class member function. We can do the same by creating a pointer pointing to derived class (like derived_class_pointer= &obj_derived).
that's was a type of compile time example.., and in that we weren't able to get the derived function functions using base class pointers. So virtual functions is made for accessing the derived class functions using base class pointers.
Love you sir 300000 times.... I'm of 13 and I regularly watch your videos please reply
Last videos was to helpful to understand this topic ❤️
harry bhai you can create an module in python
which gives the the time and space complexity of program it will be a great module in python
whats your perspective
You are great thnx
Awesome, really best course harry bhai and that's all for free 🔥🔥🔥
Harry bhai aapke videos bahot motivate krte hai 😊
Thanks Sir for your Excellent effort
Agar vise versa ho to?? I mean agar hume derieved class ke obj ko point karana hai base class ke member function ko aur hume base class ka function execute karana haii..to??...
Thanks Harry bhai for explaining virtual functions !!
sir please also teach exception handling and operator overloading
Bro is topic pr vedio bnao
Social media app ko kis kis languages m likha gya h ye app working Kese krta h
Like WhatsApp m kya kya use huaa h
Button, icon, page, label, command, ....ect
Thanks sir your video really help a lot❤❤❤❤
Awesome video😎😎👍👍
Sir mere pe ek hi computer hai isliye please vs code ko reset kaisa kerte hai bta do tabhi mai shikh skta hu coding
Why the virtual function is not working if we pass arguments in derived class function??
but what if you have passed different arguments to the display function in both the class? its not working then.
look how easy he made this concept.
That why he is best
Virtual functions in C++ allow runtime polymorphism, where the function called is determined at runtime based on the object type, not the pointer type.
Key moments:
00:00 Virtual functions in C++ allow a function in a base class to be overridden in a derived class. Making a function virtual enables runtime polymorphism, executing the derived class function when called through a base class pointer.
-Understanding the concept of pointer to derived class and polymorphism is crucial for comprehending virtual functions in C++. This knowledge forms the foundation for implementing runtime polymorphism.
-By making a function virtual in the base class, you ensure that the derived class's version of the function is executed when called through a base class pointer. This dynamic behavior enhances code flexibility and extensibility.
06:29 Polymorphism in C++ allows objects from different classes to respond to messages, achieving runtime polymorphism through virtual functions. Compile-time polymorphism involves function and operator overloading for different behaviors based on arguments.
-Explanation of polymorphism in C++. Objects from different classes can react to messages, enabling runtime polymorphism with virtual functions.
-Compile-time polymorphism in C++. Function and operator overloading create different behaviors based on arguments, determining the function binding during compilation.
08:29 The video discusses virtual functions in C++, providing examples and rules for implementation. It emphasizes understanding and practice for effective learning.
-The importance of practicing virtual functions to enhance understanding and learning in C++. Encouragement to create more examples for better comprehension.
-Upcoming content on rules of virtual functions, late binding implementation, and examples in the next video. Emphasis on grasping the virtual keyword and functions.
An important point , we can point an object of base class to an object of derived class but VICE-VERSA IS NOT POSSIBLE.
watched many videos brother but you cleared all the doubts that i had on virtual function. Thank you😍
sir jo display function derived class m h woh base class se derived hoga ya woh derived class m nya banaya gya h???
Harry bhai, what if we want to assign an integer value to the variable in derived class using "base_class_pointer->var_derived = 20;".......this shows an error
Will throw an error because base class pointer cannot access derived class variable
Sir how to access derived class variable using base class pointer?
Can we modify the value of var_derived by using base class pointer???
you missed the operator overloading topic :o
wha whaa ,, Unhone jo itna saaaraa padyaa hai wo padle pehle baadme kamiyaan nikaal lenaa
@@amanahmed6057 hahaha
Agyaa samajh me achese!
It is necessary to take the pointer of base class?
Django Class Based Views, Django Rest Framework ki playlist bana do 🙏
All dout clear thanks🙏
Harry bhai
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Why do we need to point derived class object with base class pointer?
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A humble request sir plsss iss course ko advance tak le jayiye....and pura course jald se jald khatam kar dijiye...
bhai operator overloading pa video bano plz :)
sir really i got it, sir i can't explain my feeling.. i am so proud of you..
Sir, we can access the derived class using it's objects, so why there is virtual function? why do we want base class pointer to access derived class methods? If anyone is having this answer please reply. This question is asked to me in an interview but I was unable to answer it. I replied that when we create a class to inherit it's properties then we need this but interviewer was not convinced.
carry bhai aap bahut hardworking person hi. please daily video upload kro kro aap kisi na kisi pr .
Bro I learnt python by watching your videos. I do not have a pc or desktop so I program in Android. I am facing problems in making Jarvis please help sir.
Great yaar. I will learn python next.
Sir , can we made both function as virtual ... ? It'll throw any error ?
Great series
Your teaching is really amazing... thanks a lot.. you've changed my life 🙂
Why we need to make base class pointer if we want to use derive class function just make pointer to detive class
Sir plese mujhe ye btaiyega ki ye aapka complete course hai??
& Kya hmm aapke tutorials se c++ me mastery kr skte hain??
👍👍👍👍👍👍👍👍👍👍👍
Bro ! Could you please make a video on "Biometric Identication using ML" ? I have researched about it and couldnt find many articles on it. Afew articles that too by foriegn authors were available that werent as useful as they should be !
Harry, what is the best book for a python "beginner". I have seen all of your videos on Python two times. Please reply I want to start a book now on python.
Ye to Pehle se hi 2× m h🙂isee kaise 2× m dekhu
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Hello Harry. The same is also true with references, so why do we use pointers ?
Harry Bhaii Agar base class ke pointer ko derived class ke object ko point karana zaroori h kyaaa??
please make tutorial on reactjs in one video, very much needed
Sir I'm waiting for next video of php
Sir me apke channel par 1week phele hi add huwa hu aur mujhe ye janna h ki app development khaa se start kare mujhe samjh nhi aa rha ki me konsi video dekho 😔😔aur mujhe bikul basic se sikhna h plz urgently tell me. Aur agar subscriber's me se kisi ko pata ho to bata do plz
Sir muzye Cyber security as a career Kar na hai too Mai Kya sikhu muzye python, JavaScript, networking,aati hai but aurr isse aage Kya sikhu give me advice your advice is helpful for me for my career
You can do any course on Coursera or Udemy . Even a small certificate from them is very beneficial
@CodeWithHarry Please Create a full tutorial on c++ STL
U r the best
concept cleared 6:03
Thanks Harry Bhaiya
Harry sir
Please batao
B.tech in artificial intelligence is good
Or
Bsc(maths, statistics,cs)
For becoming data scientist
Please help
@@Gintoki.Sakata918 I guess you should do Bsc(maths,etc) and take a course for AI in coursera. I am a 13 year old, but I was able to complete a Masters degree from Coursera. Doing the Masters in AI from Coursera, even before Bachelors will be good for resume
Sir I want to make website for education porpose where paid item also available and app also on play store how it done sir plzzz
JAB AATA HI NAHI TOH BANAYEGA KYAA LAV**
Thank you so much Harry Bhai.
Mast hai mast bahut badiya coder hai tu
Thanks Excellent & keep me update time by time
5:22 how did you initalized the varibale inside the class while declaring the variable
love you sir....today i know fan means..... and i am your fan sir................ lot of love from Pakistan..
You are my inspiration harry bhaiya, I got place as SDE in Dassault Systemes just by your videos and leet code🎉🎉 I hope you never stop youtube😊
which cllg bro and package?
@@abhi.1867 its a tier 3 cllg modern college of engineering, 11LPA
cool, so on campus or off?@@ankit.chaudhary.dev33
congratulations bro :)
difference between shallow and deep copy?
I love your video sir...
You are really great bro please continue the playlist of cpp
Bhai aapne Tkinter series me pycharm me kaunsi color theme use kari thi please tell
U r explanation is always best harry bhai
Harry Bhai What should I learn first C or C++ ?
You should learn C or Python first. Then Java and C ++. You can also learn HTML and CSS before Python
Y
Hiii harry bhai
You are great bro, me Apko kafi time se follow kar raha hu c ,python ,web development apke toutorial se seekhi hai
I hope ap hamesa ayese hi sport karte rahege... ❤❤❤
Thanks bro... ❤❤
bro but how can you use member of derived class form base pointer because we inherite derived class so how can you access derived class member ?
That's the point of the video ..
By using virtual fn in base class
Base class wala display ne bol diya ki mujhe mat use karo .. balki mere naam wala jo same fn derived class mei hai usko use karo
@@RoyBoyLab par derived class ka object hi base class ko use kar sakta he par yha pe base class derived ko use kar rah he wo kese because inheritencr kehta he ki child class use bas class not base class derived class
@@_Jaygurjar bhai bahut mushkil se samjha kya likha hai...
Arey pointer ka datatype BaseClass hai ....
Andt vo derive class ko point kr sakta hai ..
But it cannot acces is derived class members .
POINT KR SAKTA HAI ACCESS NAHI
YEH PICHLE VIDEO MEI THA..
iss video mei ... With the use of virtual function in base class...
Even the baseClass pointer( pointing to derived class) can call that same named fn of derived class .
@@RoyBoyLab thick he
thank you sir explaining virtual fuction 🔥 it help me a lot🙂
Harry bro, shall I start learning c++ for my bca 2nd year or shall I learn C first????????????
Bhai C++ se sikh le....aesi kuch problem nhi aayegi....sir nei Sb kuch suru se bataya h....data types, variables, etc.
@@ManishSharma-fi2vr thanks Manish
5:35 itni der se error aa rha tha fir pata chala maine derived class bana to di thi lekin maine inherit nhi kiya tha base class se
thank you for your efforts for us
please give us a detailed video on operator overloading.
Sir pls complete Android Tutorials and make some projects on it like Instagram clone , Facebook clone etc