I studied computer science in high school, and we were learning about pointers a bit, but I never really got hang of what they represent, now I'm at faculty, again learning about pointers and this video helped me more than 5 hours of my class, really glad I stumbled across you, great video, great explanation.

@PortfolioCourses

Жыл бұрын

Thank you very much for the kind feedback Dimitrije! I'm really glad to hear that this video helped you out, and that you enjoyed the explanation. Pointers are super tricky I think, many people tell me they find them to be the hardest part of understanding C. 🙂

I'm so glad they had us *take a basic computer science course prior to our C course. I think why most people find pointers confusing is because they don't know how computer memory works.

@PortfolioCourses

Жыл бұрын

That's very true, it's very difficult to understand lower level programming languages like C without some idea as to how computers are working at the hardware level (at least, the big picture anyways). :-)

simplest and best explanation on pointers I've found thus far....You're a life saver

@PortfolioCourses

6 ай бұрын

I'm really glad you enjoyed it! :-)

This video is very great. Can't believe I understood pointers and some memory related lessons. Thank you so much.

Thanks so much for these tutorials, it's rare to find someone who is so clear and so well organized, doesn't waste any time and also has such a huge output of free material. Thanks.

@PortfolioCourses

Жыл бұрын

You're very welcome, thank you for sharing this positive feedback, I'm really glad that you enjoy the material! :-)

Possibly the best set of videos on C. Please consider doing an episode on assert() .

The best video ever! It has put an end to all my curiosities and given clarifications to all confusions! Thank you thank you thank you thank you sir! The examples you gave really shed enough light! God bless you hugely sir❤❤❤🙏🙏🙏🙏

Came back to brush up, love this video!

Hi sir, I am from India, There are many indian youtube channels teaching C programming , though I found your channel most helpful. Thanks for uploading this kind of detailed videos.

Great explanation, helped me a lot. I'll be watching more of your videos for sure. Cheers!

@PortfolioCourses

Жыл бұрын

That's awesome, I'm glad it helped you Lovro! :-)

Incredibly helpful, I was having trouble wrapping my head about how these work but this video cleared it all up.

@PortfolioCourses

Жыл бұрын

Awesome, I'm happy the video was able to help you out! :-)

Dude…your videos are on point. Having just finished an intense course in C++ at my university but being actually more interested in C, this is a great way to both recap similar concepts that exist in both languages as well as getting started in C

@PortfolioCourses

Жыл бұрын

That’s awesome, thank you for the positive feedback, I’m really glad to hear the videos are helping you recap concepts and get started with C! :-)

THANK YOU!! You are one of VERY FEW who understood how to use the SCREEN AREA properly for a screen presentation. Nice layout, easy to read font size. DOUBLE THANKS TO YOU ! :) Next... i dont know how many videos and articles about pointers in C i have seen and read...i still had trouble grasping it, since i could not align "a data type" with a plain "memory address", since these things do have nothing to do with each other to my understanding. BUT now i can see why/when the "type" starts to become useful in conjunction with a plain memory-address pointed to.

@PortfolioCourses

11 ай бұрын

You’re very welcome Axel, I’m glad you enjoyed the presentation style and that the video was able to help you learn about pointers! :-)

This really helped me understand pointers when other resources didn’t thank you so much

@PortfolioCourses

Жыл бұрын

You’re very welcome, I’m so glad to hear this video helped you to understand pointers! :-)

love these videos, you have a great way of explaining confusing concepts man

@PortfolioCourses

Жыл бұрын

I'm really glad to hear you love the videos Owen, thank you for sharing this kind feedback! :-)

Your video's are so amazing. I am studying for a test and some of the examples from my class are in here and you explained them to me just like my professor did, or better. Thank you for making such amazing help when you need it at a moments notice.

@PortfolioCourses

Жыл бұрын

You're welcome Sean, I'm very glad to hear these videos are helping you out! :-)

Thanks for the explanation really helped me understanding the concept Thanks

This video is what i was looking for ! , Thank you sir i really learnt a lot watching this , much love from egypt

@PortfolioCourses

Жыл бұрын

You’re very welcome! :-) I’m so glad to hear you learned a lot watching it, much love back at you from Canada!

Many many thanks for your content. I'm a beginner with c and listen to these when driving (not distracted of course). I try to write code from books and other sources of basic code. My strategy is to loop, loop and loop again through c content and knowing it will sink in. I'm a bit stuck on functions ATM. Have seen your functions video and am still a bit confused with functions. A question I'm attempting is to write a c program that asks for two number (printf), stores them in variables (scanf) then prints the result (printf again). I understand what a prototype is and return type, function name and arguments of the function (variables) as I understand it. I'm not following any academic course ATM and am learning because I'm interested. Many thanks again.

I am taking C programming class, and your videos are so helpful. thank you for sharing such great content.

@PortfolioCourses

Жыл бұрын

You’re very welcome! :-) Thanks for sharing this feedback, I’m really glad to hear the videos are helping you out!

You sir earned my respect. I watched alot of your content already. Can`t offer more than a sub , but all my thanks !

@PortfolioCourses

Жыл бұрын

Thank you so much for watching the videos and subscribing Kyoshi! :-) Another thing you could do to help the channel if you like is sharing the channel with others (classmates, friends, social media, etc).

Just wow ,.. I've just started learning c, but your tutorials are just exceptional in comparison to what i've been watching.. it just amazes me how your channel is underrated..

@PortfolioCourses

10 ай бұрын

I'm really glad that you're enjoying the content!!! :-) And thank you very much for the kind feedback, that is really motivating for me to hear that.

this explanation is a real life saving , thank you for your effort 😊😊

@PortfolioCourses

3 ай бұрын

You're welcome! :-)

I am passing the first semester in my school thanks to u...thanks for the free content, its very helpfull, keep i up :)

@PortfolioCourses

Жыл бұрын

You're welcome Ido! :-) And thank you very much for sharing that positive feedback with me. A big part of the reason why I love making these videos is that they might be able to help students like you, so that means a lot to me that the videos are helping you out!

thank you for the class!

@PortfolioCourses

2 жыл бұрын

You're welcome Raquel! :-D

Thank you. This is very helpful.

@PortfolioCourses

10 күн бұрын

You’re very welcome, I’m glad it was helpful for you! :-)

man, your are the best, these video rescue me.

@PortfolioCourses

Жыл бұрын

I’m really glad you’re enjoying the videos Abdelmuniem, thank you for sharing this kind feedback! :-)

You’re the best for sure!

@PortfolioCourses

2 жыл бұрын

Haha thank you! :-D

This certainly helps in my understanding of pointers. I think one of the reasons that pointers have flummoxed me over the years is the notation: Using an asterisk to signal both a pointer and the mathematical operation for multiplication is confusing.

@PortfolioCourses

Жыл бұрын

I agree the notation for pointers is confusing. 🙂 I also don't like how the * operator is used to both declare a pointer and as the dereference operator. I'm not even sure I like the name "pointers", I've found people seem to understand them better when they're called "memory addresses".

@Mnogojazyk

Жыл бұрын

@@PortfolioCourses, I guess I’ll call them memory addresses and regard pointer as a nickname. :-)

@PortfolioCourses

Жыл бұрын

@@Mnogojazyk Hahaha 🙂

Your video was my "AHA moment" for pointers and malloc lol.

@PortfolioCourses

Жыл бұрын

Awesome I'm glad to hear that Sami, congratulations on the 'aha moment'! :-)

Very nicely explained

@PortfolioCourses

Жыл бұрын

Thank you very much for the kind feedback. :-)

Man I bought c course, your course 20x better

Thank you so much!

@PortfolioCourses

10 ай бұрын

You’re very welcome Tim! :-)

Thanks for great explanation! I know generally its not good practice but in this swap example if we save adress of x and y in "int a" and "int b" instead of "int *a" and "int *b" does this make any change?

@PortfolioCourses

Жыл бұрын

You're welcome Tornike! :-) The parameters of the swap function do need to be int *a and int *b (i.e. pointers) for the swap to work, it won't work if they are just int a and int b, as those would int parameters and not pointers.

About that issue of freeing memory after assigning it with 'Malloc (and also calloc, correct?)'- Is that memory space freed by the system after the program is closed? And it definitely would be removed after a reboot or crash of the system? Thank you

thank you so much!

@PortfolioCourses

6 ай бұрын

You’re very welcome! :-)

THANK YOUUUUU

Thank you so much for this video! Could you explain what -> has to do with pointers? Is it a different way to express the star * operator?

@PortfolioCourses

Жыл бұрын

You're welcome Sidney! :-) And -> is called the arrow operator, it's for working with pointers to structs, and in some sense it is a bit like the * operator yes, it's covered in this video here: kzread.info/dash/bejne/qWmMr5OHZ8uyl8Y.html

@sidneyrobinson5719

Жыл бұрын

@@PortfolioCourses This helps thank you!

Subscribed! 🏆

@PortfolioCourses

Жыл бұрын

Awesome, welcome aboard Ivan! :-)

Better than paid Udemy course. As clear as day!

@PortfolioCourses

11 ай бұрын

I'm glad you enjoyed it Eldin! :-)

Thank you very much

@PortfolioCourses

Жыл бұрын

You’re welcome Nhật! :-)

this video changed my life

@PortfolioCourses

2 ай бұрын

That's excellent! :-)

you make amazing videos

@PortfolioCourses

Жыл бұрын

I'm really glad to hear you enjoy them, thank you for the positive feedback! :-)

Is there a video on dynamic length for strings and scanf? Such as if I wanted the user to enter a string that isn't restricted to 5, 7, 8, 20 characters? Also is there a video on input validation? How would I prevent the code from continuing on with unwanted inputs that are combinations of characters and numbers and special characters.

@PortfolioCourses

Жыл бұрын

This video covers string input with spaces: kzread.info/dash/bejne/mGxpmpuSaa-ueMo.html. This video covers validating that a string contains an integer: kzread.info/dash/bejne/iWeY1tuTopvYk7w.html. But that's more for fun, if you really want to do validation I would suggest checking out regex: www.scaler.com/topics/c-regex/

Top !!!

for the example at time 14:18, how does *a and *b know to reference the memory address of x and y? I thought we would first have to define that *a points to x and that *b points to y.

@PortfolioCourses

Жыл бұрын

It's because when we call swap we have: swap(&x, &y); That will set a to point to x and b point to y. :-)

thank u portfolio u are so cool

@PortfolioCourses

Жыл бұрын

You're welcome! :-)

thanks helpful vid

@PortfolioCourses

Жыл бұрын

You're welcome Krishna! :-)

I'm glad youtube existed

good video, i like it

@PortfolioCourses

2 ай бұрын

I'm glad you like it! :-)

thanks!

@PortfolioCourses

2 жыл бұрын

You’re welcome! :-)

I love you!

@PortfolioCourses

2 жыл бұрын

Thank you Nahuel! :-D

god bless ur heart

@PortfolioCourses

Жыл бұрын

Thank you Marilyn! 😊

I have a question. My teacher usually writes for example word = (char *) (malloc(10*sizeof(char)) what is the (char *) for ?

@PortfolioCourses

2 жыл бұрын

malloc returns a void pointer, and in C++ it is necessary to "cast the type" (change the type) to (char *) or whatever other type of pointer your variable is... in C this isn't necessary. This answer has more details: stackoverflow.com/a/605856. And this answers explains some reasons why I don't do it: stackoverflow.com/a/605858. Maybe next class you can tell your teacher they don't need to do that. ;-)

@raquelbraunschweig2938

2 жыл бұрын

@@PortfolioCourses thank you!

@PortfolioCourses

2 жыл бұрын

@@raquelbraunschweig2938 you're welcome! :-D

which compiler do you use for c

@PortfolioCourses

8 ай бұрын

I use gcc. :-)

So this is a deep copy, if not a pointer and shallow copy if a pointer within a struct? What about string literals? I guess that doesn't matter because they are immutable? Is that right?

@PortfolioCourses

Жыл бұрын

If you have a pointer in a struct, then when you do an assignment, yes a "shallow copy" will occur as it's really only the pointer that will be copied from one struct to the next. And string literals are immutable, yes. :-)

js curious so wanted to ask you how long do u think c language takes to learn (like completely and ur good at it)

@PortfolioCourses

Жыл бұрын

That's a good question Rezuwan, but it would depend on a lot of things. Like if it's the first language that someone is ever learning it will take longer than if they know other languages already. Or if they are learning it full-time vs part-time, etc. I would say C can be learned "well enough" to work in it by taking a 4 month course at a university or college, or by self-studying full-time for a month. And I would say it would take a year of really working with it on some projects to get really "good" at it, though with programming, learning never stops. :-)

i'm a bit confused, towards the ending, a is a pointer, then a is also an array?

@PortfolioCourses

9 ай бұрын

Which time of the video is this? Arrays decay to pointers when used in certain ways, and pointers can be used with "array notation". This video about passing arrays to functions addresses some of this: kzread.info/dash/bejne/oZlmxLyEmsy9oso.html. As does this video on pointer notation: kzread.info/dash/bejne/mot7u6SGf5ibY6Q.html. :-)

I have no problem understanding the concept of things, i found it really hard to develop any creative solution for problems tho, how can i improve that?

@PortfolioCourses

Жыл бұрын

Great question Victor! :-) What you're talking about is a very common problem for computer programmers. I've created this playlist to try to start speaking to this problem: kzread.info/head/PLA1FTfKBAEX6e_cFeqZCuUcexEJZS4OOQ. But the playlist is still new and I have to make more videos on that one. Essentially though, it takes time and lots and lots of practice to get better at "creating solutions". Every time we solve a problem or figure out a new program our brain adds another "solution" to a library inside our heads. When we face new problems, we look back at this "library" for help. The new problem might not be identical to old problems, but it shares common characteristics to old problems. The more problems we see and learn about the more common characteristics there will be to 'new' problems, and the easier they get to solve. There is more to it then this... we get better at debugging with experience too, for example. But this is a big part of it, just lots of experience and practice. :-)

on this line int *a=&b; it stores the value that's on b address and not the b address right?

@PortfolioCourses

Жыл бұрын

That will store memory address of the variable b into the pointer variable a.

@edward3105

Жыл бұрын

@@PortfolioCourses but you placed * before a you didn't say a=&b;

@PortfolioCourses

Жыл бұрын

@@edward3105 So if we had: int *a = &b; this would be equivalent to this: int *a; a = &b; I think this part of C is kind of confusing, but if we're declaring a pointer and initializing it to a memory address on the same line, then we have the * in front of the pointer variable name. And that's just because we need it there to declare it the variable as a pointer. But after we've declared a pointer, whenever we use the * with our pointer variable it works as the de-reference operator that "gets what the pointer is pointing to".

@edward3105

Жыл бұрын

@@PortfolioCourses I kinda thought about that but in this situation like you showed in other video char *s2 =" abcdef" why I don't declare the pointer like this char *s2= &a and let's say char a[ ]= {"abcdef"}

@PortfolioCourses

Жыл бұрын

@@edward3105 Oh so in if we have: char a[] = "abcdef"; Then a is char array that has been initialized to the string "abcdef". So.. a[0] = 'a' a[1] = 'b' .. a[5] = 'f' a[6] = '\0' And then if we want to make s2 a pointer to a in this case we would say: char *s2 = a; The reason is that arrays are different than variables. If we had: char x = 'm'; THEN we would have: char *s2 = &x; and s2 would be a pointer to the x, it would store the memory address of x. But in the case of: char a[] = "abdef"; 'a' is a char array, and when we just use the name of a char array like 'a' what we actually get is a memory address, there is no need to use the & operator. So if we have: char *s2 = a; then we would actually get s2 storing the memory address of the array 'a' (the memory address of the first char in that array) We say that the array 'decays to a pointer' in this situation. If you try this: char a[] = "abcdef"; printf("%p", a); you'll see what I mean, in that 'a' is just a memory address. So we don't need to apply the & operator to *get* the memory address like we do a variable.

Man u r littttttttt !!!!!!!!!!!

@PortfolioCourses

Жыл бұрын

hahaha I've never been called lit before, so thank you! :-)

so all values in that array is stored in that one memory address?

@PortfolioCourses

7 күн бұрын

They *begin* at that one memory address, the memory address is the memory address of the first element in the array. :-)

@TheBluNitro

7 күн бұрын

@@PortfolioCourses oh I see, I understand now. thanks fam ^^

I've just noticed, you're the guy from 3Blue1Brown !!!

@PortfolioCourses

Жыл бұрын

I've never heard of that channel before Victor, but I looked it up just now and it looks cool! :-)

AAAaaaaawesome ! =)

@PortfolioCourses

2 жыл бұрын

Thhhhhaaaaankk you!!! 😀

I think the only reason pointers are confusing is because the syntax makes little sense. There's nothing about the syntax that gives clues as to what the code does, unless you already know about pointers and their syntax.

@PortfolioCourses

8 ай бұрын

I think the usage of * to both declare a pointer and de-reference can be confusing. I also think the syntax: int *p; is confusing because the type 'int' isn't really the type that p stores. Really, p stores a memory address, and int is the type of data that p is pointing TO, i.e. the type of data at the memory address that p is itself storing. But for regular variables, 'int' would be the type. That different can be confusing too I think. Imagine if instead we had: address p{int}; Or something like that to indicate p stores a memory address of type int. To me that, or something like it, could help. Oh well, it is what it is now! :-)

haha the meme is too accurate

@PortfolioCourses

Жыл бұрын

I'm glad you think so too! :-)

For once, the software is actually really useful

@PortfolioCourses

Жыл бұрын

I'm glad you found this useful Karan! :-)

I would highly recommend to start off with why you need a pointer in the first place. The way it’s presented sounds like it’s just a bunch of busywork.

@PortfolioCourses

Жыл бұрын

Thanks for the feedback Kris, I hear you. I get into this about 9:30 into the video. Normally I like to start with "why" too but in the case of pointers, 1) most people that find this video are students that are confused from trying to learn pointers from their teachers and that are looking to understand the "nuts and bolts" of what is happening, 2) it's hard to explain the use cases without explaining memory addresses and at that point I might as well explain pointers anyways. 🙂

I want an Apple but I point to Banana tree...

@PortfolioCourses

Жыл бұрын

Ah the joys of manual memory management! :-)

O indiano KAKAKAKAKAKAKA