Encountering double pointers for the first time be like: "This is getting out of hand. Now there are TWO of them."

You're the best I found on KZfaq explaining C so far! Everytime I'm looking for something and I see you did the video on it. I feel relieved because I know I will understand it and be able to use it in just few minutes. Thank you so much

This is one of the excellent topic covered. For this particular video whoever want to get the complete understanding run the code by your own and print the pointer address which will make you crystal clear. Great Job CodeVault. Your videos are tremendous helpful.

Honestly, I've been dealing with pointers for a while now and I really haven't been able to get a grasp on this topic until now. Beautifully explained, excellent video. :)

Omg thx so much! Ur explanations are terrific and truly explain the intuition behind these concepts! Thanks again!

I really like how you explain things! Well done and thanks :)

Great explanation and demonstration, thanks!

Great Job Code Vault. Thanks for the valuable info.

Your explanations are so good man!

great video. I practiced with your example. I learned alot. thanks!

Thank you sir for this series.

Bad example. Cause, in the first case you'd use a single pointer. ` void display(char *output) {}` and call it `display(str);` That's all I focused on. The extra fluff. BUT, I get what you were trying to tell people, by using & and **. So, everything you said ... correct.

Hello, thank you for your great explanation.

You have an immense clarity 👍

Underated channel ! Thank you so much for your work ! We would love to have a very detailed video about subtilities concerning pointers and chained lists. Because I think there is subtilities between passing a double pointer to a function and a simple pointer. Anyway thanks so much !

reallyyy well done!! i understood it

thanks for your lesson

C syntax is very confusing when it comes to pointers. In the last statement printf("After the call: %s ", str); , str is a pointer variable which holds the address of "This is a test" so I would expect to take the value by dereferencing the str variable like this.... printf("After the call: %s , *str); But it is the other way around. This is so much confusing for me, it's a nightmare.

Bro you are the best teacher ever. Please do consider a career in teaching. You'll be a hit.

You're awesome man

@Sergiu, many thanks for another gem! It was one of those moments when I felt I got the point but the things became tricky in practice, and I still needed to digest the gist of the problem for some time. :o) One needs to watch the whole video, especially the part starting from 5:39, very carefully to grasp the _WHY_ aspect of using double pointers (versus the _HOW_ aspect explained earlier in the video). Anyway, after digging some more, I think I found the following keywords useful to better understand Sergiu's explanation: _variable scope_ , _pointer content, a.k.a address of the first char of the string_ (str) vs. _pointer address_ (&str) vs _pointer dereferencing_ (*str), _data sharing between functions_ and _memory management_ in C. AFAIU, the gist of this video is in C dealing with string literals (behind the scenes) as constants (not variables), hence the need to use a double pointer to redirect the same pointer to a _different memory address_ when one needs to get a new string. C makes a trick pretending to "change" the value of the pointer, but in fact points to another physical memory address for the new string. *Question:* Now what happens to the string literal when the same pointer now points to another one, e.g.: [const] char* str = "This text" ; str = "Another text"; Does it become a garbage in the memory? Thank you!

The pauses that this dude made between sentences reflects how difficult is understand the pointers in c language

Awesome!

So basically since you can't do &&&address, ideally double pointers and further mainly serves when reuising values inside functions called inside other functions, right? Because other than that, in a practical case I could just declare a char array and refer it using a regular pointer with the display function

I understood by your video, double, triple, n pointers are just hierarchies used to modify lower "rank" pointers.

Didn’t you have to malloc before assigning str a longer string “another test”?

Nice -Thanks I do have a question though. When in main you have a void function(char ***s1, char ***s2) main() { char **s1 // list of fields char **s2; // list of data for the fields. function(&s1, &s2); // this function splits the string into fields and data. } How should one handle that inside the function so that the list back in main can be printed or used elsewhwere? void function(char ***s1, char ***s2) { // get the number of rows... // allocate enough pointers based on number of rows. malloc ... // How would add values? I know strdup("") will allocate the memory for the actual string. But, after that I just get errors :) // 1 **s1 = strdup(Field1); **s2 = strdup(data): // or 2 *s1[0]= strdup(Field1); *s2[0]= strdup(data): // seems like I am so off in both cases. Back in main it seg faults. }

Can u make a video on linked list with single and double pointers

What Compiler are you using?

When you changed the str pointer from “This is a test” to “This is another test” do you need to free the memory taken by “This is a test”?

Sir at 00:12 you said , " these characters are stored somewhere in global memory . " Sir , can you please explain this concept to me ( in brief ) or a video on it as why these characters not being global and are still stored in data segment of our program's memory?

u tried well bro

are those two the same?just without one step? i dont get it. char str []="sth"; char* pstr = str; and char* pstr="sth";

then why printf on display fungction have another pointer? u said double pointer already pointed to the string "this is a test"

❤️

I dropped out after one minute. Why do you use a **pointer as the function argument?

4:34

int main(int argc, char *argv[]) _versus_ int main(int argc, char **argv)