C++ - Страница 1257

at the moment I am using a windows machine and wanted to try out windows subsystem for linux(wsl) for c++ development. Visual studio code(vsc) provides a neat extension for working on the subsystem that works quite well. One thing I could not get to...

I have a simple code which looks like this, which I was experimenting -

#include #include class TestClass { public: TestClass(int a, int b) : mA(a), mB(b) { std::cout

Источник:

With the attribute [ ] used for plain old data (POD) arrays like ‘std::size_t[]’ the template specialization for zero structure size could be as small as index member is has, not occupying memory for the data array.

When I do the same with the...

I make an executable file using cmake, and it runs perfectly on my computer, but when I share it to another computer and I open it, it says libcrypto-x64.dll was missing. I tried to find it on web and searched everything but I didn't find anything....

I wrote the following code that has two lambdas. One of them explicitly captures i while the other doesn't. Note i is constexpr so we don't need to capture it explicitly.

My question is why func(lambda2) doesn't compile while func(lambda) does?...

// TEST.cpp : Определяет точку входа для приложения. // #include framework.h #include TEST.h #include #define BUTTON_WIDTH 100 #define BUTTON_HEIGHT 30 #define WC_BUTTON L BUTTON #define ID_BUTTON_LOGIN 100 #define ID_BUTTON_SIGNUP 101 #define...

I'm working on a native Windows app to stream part of my desktop to a microcontroller as part of a creative tech project. It's written using C++ and is curently a console app. I have no intention of switching to Javascript, C# or anything else....

How should I write a command for all os to work

I also used

system( clear || cls ); It works in cmd but not windows terminal why it's like this?

And getch() is not work in linux Because of conio.h what other libraries can I use

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I'm trying to locate a book ( if available) where I can learn about the structures of accessing & manipulating the data from a MCU.

Background.

I have a number of programmers which have the ability to program , access , manipulate the bin files...

Processing large amounts of data (gigabytes) I use indexes to data arrays. Since access to data could lead to cache inefficiency, I want to cache some data from array together with the index which gives dramatic speedup for operations through...

I wanted to add some unit tests to an existent Qt application, but I can't figure out how to do it.

The official documentation explains it, telling that I need to create a class containing the test code (I suppose that both the class itself and...

I would like to use basic authentication in my server-client application.

On client i set credentials in client:

credentials creds( utility::conversions::to_string_t(username), utility::conversions::to_string_t(password)); http_client_config...

I wrote the following code that has two lambdas. One of them explicitly captures i while the other doesn't. Note i is constexpr so we don't need to capture it explicitly.

My question is why func(lambda2) doesn't compile while func(lambda) does?...

PIMPL stands for P ointer to IMPL ementation. The implementation stands for implementation detail : something that the users of the class need not to be concerned with.

Qt's own class implementations cleanly separate out the interfaces from the...

I have suprising observation that steady_clock gives poor 10ms resolution when measuring durations. I compile for windows under cygwin. Is it sad true or am I doing sth wrong?

auto start = std::chrono::steady_clock::now(); /*...*/ auto end =...

Question:
I've been exploring different types of casting in C++, particularly const_cast, which is used to cast a const T to T, where T represents a data type. However, I encountered a perplexing behavior when experimenting with const_cast....

I am in a situation where I need to round 0.5 and -0.5 down to 0. So I checked various documentations -

The generic C++ methods seems always round 0.5 away from 0.

While if I go the lower level way by setting rounding style, it seems a very...

If I need to know template parameters in some other template which uses it, how can I access them?

Is the way below with the constexpr static size_t data_size the recommended approach or there is some syntax which could allow to get access from...

I am currently working on adding CMake support to a library that currently uses waf as its build system. The code I have for CMake is excruciatingly slow compared to the existing build system with waf, and I believe it is because of the following...

I tried to accept touch events in Qt6 like this, in main.cpp:

QApplication::setAttribute(Qt::ApplicationAttribute::WA_AcceptTouchEvents); error: no member named 'WA_AcceptTouchEvents' in 'Qt::ApplicationAttribute'

IntelliSense shows that...

I am trying to implement an order statistics tree with using __gnu__pbds. I followed this code TREE_ORDER_STATISTICS

But, I need this on a multiset. I was suggested to use a pair to implement this feature CODEFORCES COMMENT

//Main idea is to...

I have .sln with two projects: library (.lib) and project (.exe), which use this library.

Library uses external header and has path to it in Additional Include Directories, but I confused that I also should add path to this header to Project's...

I want to display an image within a scroll area. The view port of the scroll area shall have a defined initial size. That means, if the image's size is bigger than the initial size of the view port, scroll bars will be visible, otherwise not.

//...

full error message: terminate called after throwing an instance of 'cv::Exception' what(): OpenCV(4.9.0-dev) /home/princess-ellie/opencv/modules/highgui/src/window.cpp:1255: error: (-2:Unspecified error) The function is not implemented. Rebuild the...

I am currently working on a project involving property handlers, specifically targeting .txt files. As a newcomer to this field, I have encountered an issue that I'm struggling to resolve and would greatly appreciate your guidance.

My objective is...