Virtual Function In C++

[@pinakipb2]

After a long time........... Really appreciate your videos.

[@CppNuts]

Thank you so much 😀

[@treyquattro]

Always good to see new videos from Rupesh! Virtual is a very important topic in C++

[@CppNuts]

Correct!!

[@treyquattro]

@Seth Trenton no, no-one gives a shit about your lies and malware

[@mockingbird3809]

Great video as always, Cppnuts! ;)

[@CppNuts]

Thanks dude...

[@amitpaunikar3408]

After long time.....good explanation

[@CppNuts]

Thanks..

[@mohanrajawat6508]

such a wonderful video over the complex topic like virtual

[@bimalthapaliya7134]

Sir, please make a video on pointer to object and object to pointer! We are getting lots of confusion in that portion! PS- always loved your work! Thank you for this series!

[@rajeshsola1776]

Hi, Thanks for sharing great videos, i think one statement can be fine tuned...Instead of saying virtual functions can be called with pointers and references only (which implies can't be called by objects), we can say that if we call with objects directly it'll go by static binding and won't get benefits of runtime polymorphism (or) to get the benefits of dynamic behavior call by pointer/reference..please see

[@CppNuts]

Thanks man, but did i said this? I think i always added dynamic word with that line.

[@ManishPatel-dj7eb]

Nice informative video, It explains all details in easy way. thanks Q1. Which editor you are using ?

[@sureshonteru4609]

Hi Rupesh Thanks a lot for the video , still I have a doubt why Base * b = derived () It's calling base class method, what happens it's storing derived class address but it's calling base class method ,what happens inside and compile time . can you explain

[@raghuj7097]

Super...after a long time...we are happy to see

[@CppNuts]

Thanks..

[@yashsaxena4634]

Thanks for making it simple.

[@CppNuts]

Glad it was helpful!

[@hunnybunny4723]

So what exactly is the use of this virtual functions concept? In what way is it useful in the real world scenario? We can call derived function by creating derived object ryt, what exactly the need of calling through the base class pointer?

[@ravishsga]

Good to see you back Rupesh :) Just one question in which scenario we need to call the derived function with the base class pointer? Why we are making the base class pointer point to the derived object?

[@CppNuts]

If you want to create an array of different objects you can make their parent common and have array of pointers of those different object and do some operations on a single array. Let me know if this is not clear, actually I wanted to explain this also in video that why do we need that but I didn't actually find the good example for this.

[@hritik4807]

@@CppNuts not clear , can you make a video :)

[@priyaldesai8290]

Hi, Thank you for sharing the video. Can you please share the link for following vptr and vtable video as well.

[@CppNuts]

I prepared notes to teach but i lost it somehow and still i didn't feel like redoing that notes, that was like so much hard work.. Hope i may find courage to redo it and shoot the vid.

[@mansokash2215]

very good explanation, thank you, keep them like this detailed

[@abhaybajpai9469]

Very Informative video....thanks a lot.....again!!!😁

[@CppNuts]

Welcome..

[@vvpChannel3112]

What if we have a data member in base class lets say float f=1.2; So, can we access b->f iff Base *b = new Derived ?

[@CppNuts]

Yes..

[@sharath5796]

u have to declare that data member as protected ig

[@ahmedajbna4804]

Thank you so much. I was very confused, now I got it.

[@CppNuts]

Welcome..

[@abhinavkumar562]

I hope that you will continue the dsa series...

[@CppNuts]

Sure man..

[@bhupeshpattanaik7150]

Thanks ☺️ .... Please guide for competitive coding using CPP

[@CppNuts]

Sure dude.. Let's complete virtual topic first.

[@bhupeshpattanaik7150]

@@CppNuts ya please that soon ..... Very curious to start

[@Vicky-xi9ns]

Thanks for your c++ series

[@CppNuts]

Glad you like them!

[@AJAYKUMAR-gl1vx]

class Base{public: virtual f(){}}; class Derived:public Base{public: f(){}}; int main(){Derived d; Base b=d; d.f(); return 0;} Here f() will be early binding or late binding??

[@vishalchoudhary2913]

9:50 Please correct you can give body to pure virtual function.

[@CppNuts]

Yes we can give body to pure virtual function.

[@ArjunArjun-vw5fq]

congrats for 28k.

[@CppNuts]

Thanks bro..

[@AJAYKUMAR-gl1vx]

Hi 😊 Can you please explain, why pointer or reference variable is required for late binding?

[@CppNuts]

Because late binding itself tells that I will be available later, and what ever comes later you have to work on that and this later thing is handled using pointer or reference, because later only these two make sense. In case of static (current, not the late) meaning you already have the object on which you will work.

[@AJAYKUMAR-gl1vx]

@@CppNuts Thank you 😊

[@Jam18123]

very informative, thank you

[@mohammadjadidi233]

Really appreciate your videos....

[@CppNuts]

Thanks..

[@shirishareddy2795]

why can only achieve polymorphism(virtual function) through pointers or references,but not through object assignment. pl z solve my doubt sir

[@ranjanrajesh08]

Hi Rupesh, i tried coding using reference concept for virtual polymorphism…it is not working exactly the same way…i mean to say using reference if i try to call the fn…by removing virtual keyword in base class, then also last overridden fn gets called instead of base class fn

[@CppNuts]

Give me the code plz.

[@ranjanrajesh08]

@@CppNuts hey Rupesh…my mistake…i must have been doing some mistake…I tried to run the code again and i see it is working as expected…Thanku Rupesh😊

[@SunilDevadiga-u6q]

Cracking interview is much easier if we watch your all cpp videos, Thanks for your knowledgeable videos. one help please - I didnt find Vtable and Vpointer explanation video - Can you please help on this?

[@CppNuts]

Thanks man, I had prepared for that video and then somehow with time I lost all the materials, but don't worry I will try to collect it back and push this video asap.

[@chitranshsaxena59]

Hey, nice video, maybe you can also explain about vtables and stuff

[@lifeisacelebration7233]

Volume is bit less for all videos.

[@CppNuts]

Correct, i try to avoid noise, so it become like that, i will work on this sound issue. Thanks..

[@lifeisacelebration7233]

@@CppNuts thank you for all the tutorials

[@CppNuts]

You are welcome..

[@rachitaa._]

Really helpful

[@prasadsolleti3870]

Sir please explain one real time example code in virtual function and pure virtual function

[@adityavaste3732]

That was so an amazing tutorial... But I have one doubt, that why we are saying it as "Run-Time Polymorphism", bcz compiler can easily decide which function he has to call, as we are using "virtual" keyword there, So, at a compile-time, he knows that, "We don't have to call the function in the base class bcz it is using virtual keyword, and we have to call the function from the derived class with the same name", that's simple........... he can easily decide at a compile-time, why he goes with run-time?

[@CppNuts]

But it can call base class function also.. that's the point. Base pointer can contain either base object or derived object if it is containing derived object in that case it will call derived class function or if it is holding base class object then it will call base class function. That's why it is run time behaviour because base pointer can contain either base object or derived object so we really don't know no what object it is going have till run time.

[@jilmon3498]

Virtual table ?? Video?

[@prishaphotography9063]

Nice👍

[@CppNuts]

Thanks ✌

[@NolstanLogic]

wabwera

[@nikhilkhatri9721]

*I don't want to become animal!!*

[@CppNuts]

Good

[@Mani--ck3xc]

hi @CppNuts i am getting this error cannot find virtual: No such file or directory , c:/users/mani.chaitanya.konka/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/12.2.0/../../../../x86_64-w64-mingw32/bin/ld.exe: cannot find virtual: No such file or directory c:/users/mani.chaitanya.konka/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/12.2.0/../../../../x86_64-w64-mingw32/bin/ld.exe: cannot find function: No such file or directory