C pointers explained👉
Ғылым және технология
C pointers tutorial example explained
#C #pointers #tutorial
void printAge(int *pAge)
{
printf("You are %d years old
", *pAge); //dereference
}
int main()
{
// pointer = a "variable-like" reference that holds a memory address to another variable, array, etc.
// some tasks are performed more easily with pointers
// * = indirection operator (value at address)
int age = 21;
int *pAge = &age;
printAge(pAge);
//printf("address of age: %p
", &age);
//printf("value of pAge: %p
", pAge);
//printf("size of age: %d bytes
", sizeof(age));
//printf("size of pAge: %d bytes
", sizeof(pAge));
//printf("value of age: %d
", age);
//printf("value at stored address: %d
", *pAge); //dereferencing
return 0;
}
Пікірлер: 121
Anytime I need to know something about programming, your channel is the first one I look for.
Just some advice.to truly understand this concept is a thorough way to apply it to your programs, I think it's best to take it slow. Don't feel bad, in my lecture I slowly and methodically took notes for hours on a 30 minute video to grasp the idea as a noob. It's ok to take your time, not all of us are coding gods. The only objective you should have is understanding it, and for each person that learns differently it's going to take varying time. As long as you come out with the knowledge, than your knowledge is just as effective as anybody elses.
@SK-ow4vw
Жыл бұрын
I think that the conceptual problem about pointers begins much earlier than you might imagine. For example, let's take 'int age = 21" You said the integer 'age' has a value 21 AND an address. I then could easily say "well it also has a name 'age'. So now my question would be 'where is the string 'age' stored, where is the 'address' stored and where is the value stored.' Then I would ask 'how do you get to the actual integer value from the string 'age'? Surely to humans the string 'age' IS A POINTER to the value 21. So there is even confusion BEFORE one starts speaking about 'normal' pointers. As far as I understand it the compiler completely removes any reference to the string 'age'. Does it therefore replace the string 'age' in assembly code with the address where we can find the value 21? If so, the address that appears in the machine code IS A POINTER also to the value 21. Unfortunately we now don't have a name for it. So this whole issue for some of us needs to be cleared out of the way first before we can even start to talk about pointers. So in a nutshell: we need to know precisely what happens to the string 'age' in machine code.
@sueyourself5413
Жыл бұрын
@@SK-ow4vw No, no we don't. It's a reference of text, not a string.
@onlyeyeno
9 ай бұрын
@@sueyourself5413 I believe You actually strengthened "*Sk-ow4vw*"s argument, by seemingly missing his point... As I read his comment, the "issue" is not if the "variable-name" (age) is a string or some other "datatype". Rather according to Sk-ow4vw the "crux" of this is the fact that when describing (and thinking about" the "concept of a variable", it has both and address, a value (held at that address) AND a "variable-Name". And so when explaining Pointers in a way that totally neglects to even mention the "handling and destiny" of the "variable name" You risk to "loose/confuse" people who think that "one step further". At least that's how I read SK-ow4vw's comment. Best regards.
nice explanation, your tips on what's good practice makes it way easier to understand
Awesome sir keep it up. You have nice way of explanation
Great video. Can you make video about void pointers, array pointers, struct pointers as well?
this was the clearest way someone has ever explained pointers to me. thanks
As a CS major @ Virginia Tech, you have blessed me with a foundation that builds my confidence!
@tybargky461
Жыл бұрын
@@d0ubleyouteef You go to tech?
@dinnersandvich9329
9 ай бұрын
@@d0ubleyouteef what?
great explanation, very clear, thank you!
Finally got a clear insight into what all these denotations in pointers mean. Thanks a ton, bro
#include void printAge(int *pAge) { printf("You are %d years old ", *pAge); //dereference } int main() { // pointer = a "variable-like" reference that holds a memory address to another variable, array, etc. // some tasks are performed more easily with pointers // * = indirection operator (value at address) int age = 21; int *pAge = &age; printAge(pAge); //printf("address of age: %p ", &age); //printf("value of pAge: %p ", &pAge); //printf("size of age: %d bytes ", sizeof(age)); //printf("size of pAge: %d bytes ", sizeof(pAge)); //printf("value of age: %d ", age); //printf("value at stored address: %d ", *pAge); //dereferencing return 0; }
@giaminhpham2281
2 жыл бұрын
can you make another code that use cin, cout pleaseee
Could you do a Scala series? That'd be so cool
This is really clear, thank you! Got me though a mental block I was having on Codecademy
It would be awesome if u teach or solve the problems of languages
Thank you!
You cleared my mind about pointer with one view. Thanks a lot. I will be coming to check more videos from your channel. I’m learning c atm. Really appreciate man 🎉
Hey bro thank you for your smooth well explained videos!❤
Dude wtf!! You are a savior !!
bro , you deserve more than like , comment and subscribe. You are amazing mashaAllah
Thank you bro best course
your vids are always easy to follow along. Thanks a lot
@advance6846
17 күн бұрын
r you black gojo
I would really be glad if you'd make a video about double pointers. Many videos are on youtube but it hard to understand it. and when I watch your videos, I can understand it easily. I am so thankful for all the tutotiral you made
@A1cJ121
4 ай бұрын
A double pointer is essentially a pointer that holds the value of the memory address of another pointer. int x= 5; int *pX = &x; int **pPX = &pX;
nice video
bro, idk who you are, I don't know where you've been, idk what you do, but thank you, I love you 3000. I just watched this video and understood everything about pointers. It took my professor 3 class sessions to do so and I still didn't get it.
Great video,can you make video on creating a simple shell in C
thanks bro
I love you seriously
You're awesome bruh
I have a question how can somebody make so amazing hell videos.
thanks! it helped me a lot
Thank You.
love this
top G
I have understood golang pointers by understand C pointers
thx!
I've never really grasped why pointers are somehow really hard to understand for some people. I'm not trying to be condescending. I'm really not! It's literally a memory address. There's nothing more to think about other than type casting pointers and pointer arithmetic, imho. When using pointers, all your doing is working with the address of something that exists somewhere else in memory. Good video tho, it was really useful. I honestly find useful
@SteveCatalunyaSE
19 күн бұрын
As a beginner my issues with understanding have been: - Why the need to define the type of the underlying value if we are always talking about its address? - Why confusingly re-use the asterisk for different, but associated purposes.
@joevaghn457
19 күн бұрын
@@SteveCatalunyaSE ah, So the type-of-pointer thing is so that the compiler knows how many bytes to advance the pointer ( pointer arithmetic: ++, +=, etc ). The reuse-of-asterisk is just for declaration. All I care about is if the asterisk is on value, it’s a dereference, if it’s on a declaration, then it’s a pointer. I hate dealing with multidimensional pointers beyond 3 levels. That stuff is extreme lol
love being a fellow bro.
Pretty useful
Excellent😊😊😊
way too underrated
thanks😄
Which compiler and IDE is best to practice programming
@icantthinkofaname5558
Жыл бұрын
i use visual studio and mingw64 for C
This video is great.
U saved me in exams
Mitico!
The best
Thanks for the video, but there is something I am wondering about why the address is changing always when I restart the program !?
@heyaglitz
Жыл бұрын
It's because your program won't always get assigned the same range of memory by Windows, it's normal and it's intended to be like that.
@Atomos_tech
Жыл бұрын
@@heyaglitz OK, thank you
very nice
Would have been good to include a proper function and call. That was reason watched. Sigh…
Thanks Biggus Chaddus
2nd time its really clicking for me, probably going to have to relearn this like 20 times lmao
I prayed 😇🙏
I LOVE YOU
Brooo... This channel is absolutely great!
In what situations should I use pointers?
@RJ-or8bw
7 ай бұрын
If you need to use a lot of memory that’s not standard size. If you have a struct that contains a lot of different data types, you would use a pointer to this huge chunk of data to get it all.
if we declare the pointer as int *pAge; then pAge = &age does the compiler consider *pAge as a null value?
@dotcomwhiz
2 жыл бұрын
nope it will assign an arbitrary integer at that address
Here's some code I wrote using pointers: #include #include #include #include #include #include #include void addition(int firstNumber, int secondNumber, int *pResult){ *pResult = firstNumber + secondNumber; } int main(){ int firstNumber = 20; int secondNumber = 39; int result; int* pResult = &result; addition(firstNumber,secondNumber,pResult); printf("%d+%d=%d",firstNumber,secondNumber,result); }
awesome
it entered uncharred territory im WHEEZING
hey ya bro
I told my dad that I was taking a C programming course.... He offered to give me some pointers
Thanks
From a bro
Leaving a random comment down below.
nice
good
Makes sense but I bet it’s difficult to apply
一直觉得挺难理解的,大一的C语言期末考还挂了,hh
amen
This is a comment for the youtube algorithm
letsgo
r u 21 years old?
yea im still confused
Elhamdülillah 🤲🏻🤲🏻 I found one video that isn't hindi english accent
@shavilagt1072
Жыл бұрын
hocam öğrendiniz mi c'yi?
@SHOURYAAAA
Жыл бұрын
Lmao. The problem is with you. I wont blame Indian people just because hindi is their language and are better at programming than the people of your country.
@diversiontv777
9 ай бұрын
I hate hindi
@OMNI_INFINITY
8 ай бұрын
Haha. Translation: Found a video that is trustworthy.
@burstfireno1617
3 ай бұрын
😅
Looks like heavy depression.
sanks here's a comment.
This stuff is too hard, I give up.
printf("value of pAge: %p ", pAge); Ehh how can this be value of pAge when the output is an address? Don't get it..
@VimalrajS-bm3vb
7 сағат бұрын
instead of pAge you give *pAge then you get value
this video was quite difficult to understand
comment...
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comment
apres du txa es
Jesus it looks so confusing and pointless :D.
thanks bro