void printCircle(const Circle& c) { cout << "The area of the circle of " << c.getRadius() << " is " << c.getArea() << endl; } Note that this code will not compile if the getRadius() or getArea() function is not defined const.

The problem with C++ is that the standardization commitee is split from the implementation engineers (admitted that some of the engineers are there in the standards committee) and the regular developers. For programming languages like Rust, when a RFC comes in for a feature, as soon as it is accepted, the feature is added to a nightly build of the Rust tool chain. Developers use that along with the standardization committee members and constant feedback is generated and the feature matures and is made available in the next release. It is only after this process, the feature is documented into the next release version's documentation. Till this stage only the RFC is the go to document for the feature. For C++, this feedback loop is missing. The developers who use it are not part of the standards team and for a layman developer to give feedback on a proposed feature is a pain in the ass. Contrast this with the Rust Lang forum (which incidentally is the go to forum for Rust developers rather than Stack Overflow). Anyone can chip in and the feedbacks are seriously evaluated. Unless the mighty lords of the team overseeing the C++ standardization step down from their thrones, C++ is a language that will go the way of COBOL. Older systems will need support but new systems will look at other languages.

void printCircle(const Circle& c) { cout << "The area of the circle of " << c.getRadius() << " is " << c.getArea() << endl; } Note that this code will not compile if the getRadius() or getArea() function is not defined const.

Thank you guys for a such extended answer.

Why did you leave the group?

Hi guys, i'm having some problem with memory leak, i'm using Valgrind to detect some problems in a C program and i already tried to change the code in every way i can think and nothing worked. Also the Valgrind output seems not so approachable and im not understanding, here is the code snippet if someone wants to help me about it https://gist.github.com/Anthhon/971571ebaf6f4a3bfb727cac33ae1da6

There'd be no memory leaks if you used idiomatic C++

And the constant refrain from the standards committee to this complaint is "What prevents you from joining the standards team? If you want improvements join the committee". As if it were so easy. The process is a pain and people have to fork out 1000s of dollars to even see a meaningful change. No wonder they alienated people like Scott Meyers whose only fault was that he disagreed with some of the proposed features for constexpr and that he used the words "universal reference" instead of "forwarding reference" for which again he was chastised to the hilt

Haha indeed, but i'm doing it to learn it's all about the challenge

What thousands of dollars are you talking about?

Hi guys, i'm having some problem with memory leak, i'm using Valgrind to detect some problems in a C program and i already tried to change the code in every way i can think and nothing worked. Also the Valgrind output seems not so approachable and im not understanding, here is the code snippet if someone wants to help me about it https://gist.github.com/Anthhon/971571ebaf6f4a3bfb727cac33ae1da6

Probably because you have a constant object? ;)

What does generate_password return?

A random string with a length defined by the pass_len variable

There's actually this feedback loop but not a lot of people use it The idea of such a loop to use compilers with experimental implementations of the new features

To attend the standards committee meeting. To be a face in thee room. Only then you are taken seriously. Most of the times, big corporates sponsor one or two of their employees. But for the rest it is not so easy. And feedback from remote places are as good as trash as far as the corresponding WG team is concerned.

No. It is not like Rust. If you have a feedback, you will have to talk to the people who wrote the proposal and make them understand why or what you think should be improved. There are many people who would inundate the proposers with such requests and it is natural for them to ignore a considerable number of these. The WG teams don't scrounge Reddit or Stackoverflow looking for feedback. This is where Rust, Golang, Kotlin and even something like Ruby and Python these days are different.

But now most of the meetings are online

Does it allocate it? Or it uses some static buffer? I mean can it be that you supposed to free it

The function looks like this: char *generate_password(...parameters...){ 19 20 char* generated_password = malloc(LENGTH + 1); . . // GENERATES PASSWORD . 26 return generated_password; 27 } I didn't paid attention about the function but i also didn't freed the memory in generated password cause i have to return it, can i free the memory outside the function?

Yes. But those are only the WG meetings. Not the standard meetings. Every year the standards committee meets face to face three times for a full week. If you miss out on these, you can kiss your feedback goodbye. This is where serious work is done. Whatever work was done in WG meetings are accepted or rejected here as is. There is no room for feedback after as the standard is worked on at these meetings.

His proposal was probably made by someone from the WG committee. There are exceptions. But my point is how many regular developers can offer feedback on a C++ feature to the standards committee directly? Show me how. Has the standards committee adopted a practice for this? Do they have a forum where people can participate? Where should I raise my questions? The process of joining a WG subcommittee itself is a pain. I know this because I have tried many times to join the Networking subcommittee. You must have a CPP Users Group in your country and your nomination must be supported by 2 other members. Preference will be given to those who are referre by members who have attended CppcOn conferences in the past as a presenter. Once this is done, you will have to share a letter from your employer saying you are involved in C++ work on a day to day basis and your work has a positive impact on the organization. If you are a freelancer, a recommendation from one of your clients would suffice. You will then have to spell out how you think you can make a difference to the committee and why they need you. You are either accepted or rejected after all this. Getting accepted into an IVY League college is far easier.

Yes. Typically when you allocate something and pass it out of the function, you are basically passing the ownership of the allocated memory to the caller and the responsibility for freeing it passes to the caller instead. Sometimes Valgrind may flag this as a leaked memory.

I think in Russian WG the process is easier

Talking about code readability you think that would be better to free the memory by itself or just to make the 'generate_password' function send the string directly to the string pointer?

There is no country based WG. WGs are groups that work on different part of the standards. So your friend must have been accepted into a WG easily or he/she may have had a friend in a WG group where his/her friend recommended that feature. Talk to him/her. Am sure it wasn't as easy as you make it out to be.

Yes. Typically when you allocate something and pass it out of the function, you are basically passing the ownership of the allocated memory to the caller and the responsibility for freeing it passes to the caller instead. Sometimes Valgrind may flag this as a leaked memory.

https://stdcpp.ru/en/about

Yes. Typically when you allocate something and pass it out of the function, you are basically passing the ownership of the allocated memory to the caller and the responsibility for freeing it passes to the caller instead. Sometimes Valgrind may flag this as a leaked memory.

But valgrind is right and technically it's leaked memory, isn't it. Or you mean sometimes valgrind can miss it?

Hi everyone . Is there a way to use strtok to find a "substring" in a string ?

What? That is not what strtok is for. Finding a substring is an entirely different problem from tokenizing a string.

I know its use.

If you do, why do you want to use it for something that it is not meant to do. It is like asking "Can I use printf statements to accept input from the user"

I thought maybe there's a way to do it by using strtok

Yes there is a way. But it is not right. You can make the delimiter the substring you are searching for. Instead of using strtok, you can use strspn to do this directly as strtok calls strspn anyway or something similar. But the right way to do it would be to use strstr.

So i need help about the above question anyone understand help me

is runtime performance of an app affected by putting more memory in the computer???? I mean it does not only depend on the CPU if the program can be loaded to memory? (like if your program can be loaded to memory totally with 1GB or less adding say 16GB should not make a difference)

yeah, I ask because I saw this performance test and for me it doesnt make sense that just upgrading memory they ran more fast :) (I believe there should be an update of CPU or something behind the scenes if the same program running) https://filia-aleks.medium.com/benchmarking-all-aws-lambda-runtimes-in-2021-cold-start-part-1-e4146fe89385

why my messages are deleted and resent by bot? According to rules several lines of code are ok

The bot have strict filter for new users, and later you are removed from monitoring. As for your messages, Telegram marked some of your words as a links: someDataService.data, that was a trigger for the bot filter

is w3schools a good site to learn C ?

not great, not terrible

any great ones u know ?

cppreference

is w3schools a good site to learn C ?

It'll give you only general idea of C programming language topics like pointers, for loops, if's and so on. After you're done with reading the site go for practice resources like w3resources

how much time does it take to learn c (basics)

any c learning beginners in this group?

Started less than 6 months ago... check my profile link to see the code I've done this time, mostly Lua modules written in C.

@Rafiqshaik07 forget about CPP reference, and other material containing lessons about C++. Some books mixes C and C++ and, even having dedicated/separated chapters about them, it is inevitable that authors end mentioning C++ when speaking about C, making it more difficult than really are.

@Rafiqshaik07 You can start with this guide (online free): https://beej.us/guide/bgc/ A good book to follow is "C: The complete reference" of Herbert Schildt. And again... Most of C harsh is about pointers, memory and difference about stack and heap. Once you master it, the language is a breeze.

any c learning beginners in this group?