C++ - Страница 1261

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...

I am trying to make a simple tool that requires some lookup on a fixed key-value dataset, so I try to lazily throw all data to a hashmap in the header file:

/** main.h */ #include #include using namespace std; const unordered_map test = {...

In class A, I define a class B. I want to hide the implementation of class B. The class B inheirts from QObject. The code like follows:

// a.h class A : public QObject { Q_OBJECT public: explicit A(QObjcet* parent=nullptr); private: class B;...

I am trying to parse a JSON file.

JSON file:

Code:

bool readSamples(const std::string samplePath, rapidjson::Document& document) { Logger()

Источник:

Our class was challenged by a professor at uni that if we were able to find a algorithm that fittingly describes the following Big-O-Notation, we'd instantly pass his class. I wanted to ask if any of you know how this could be done since I've been...

In class A, I define a class B. I want to hide the implementation of class B. The class B inheirts from QObject. The code like follows:

// a.h class A : public QObject { Q_OBJECT public: explict A(QObjcet* parent=nullptr); private: class B; };...

When I run the google benchmark I get a WARNING saying that cpu scaling is enabled. Is that a feature that I can toggle at build via flags or at runtime via arguments or is it a system setting?

I want to write an integer to a stringstream in another thread. I tried to do that in a jthread, but the stringstream seems not getting anything. If I turn to use thread, everything works well. Would you please help me about why this problem...

My clang-format's result is as follows:

cmn::Atomic my_var; int main() { } However, I want my_var to be on the same line of std::mutex>, just like this:

cmn::Atomic my_var; int main() { } How to make clang-format work as I expect? My...

I want to make switch for string in my c++ code but i cant do it please help me for exapmle I want to switch for my enemy name that they have diffrent name

I try the Switch but I have error for switch string and compile dont let me do it please...

What is the differences between these two child classes generally, and specifically in relation to memory:
(1)

class parent{}; class child : parent{}; (2)

class parent{}; class child{ parent parent_object; }; Is that true that whatever...

I have been trying to do some basic function call and function in C++, and got wrong output as 0 in calculation of simple interest. Need help with this.
using namespace std; int SI(int principle, int rate, int time){ int result = (principle * rate *...

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...

I have linking errors, when trying to do an atomic load of a 16 byte block. I have the following code:

#include struct MyStruct{ long x; long y; }; struct X{ std::atomic myStruct; }; int main(){ X x; MyStruct s = atomic_load(&x.myStruct); } When I...

Я действительно застрял... У меня есть программа для Windows, которую я пытаюсь просто записать в реестр.

Проблема в том, что RegCreateKeyEx() возвращает 5 (ERROR_ACCESS_DENIED).

Мое имя пользователя для входа принадлежит к локальной группе...

Если какой-то ключ уже присутствует в карте, что произойдет

Если какой-то ключ уже присутствует на карте, и мы пытаемся вставить другое значение с тем же ключом, что произойдет

При использовании Makefile я получаю сообщение об ошибке неопределенная ссылка при связывании объектов с исполняемым файлом.

Но я уверен, что добавил путь включения и ссылку на библиотеку в настройках g++.

Для этого я копирую и вставляю C_FLAGS...

Я пытался выполнить какой-то базовый вызов функции и функцию на C++, но при вычислении простых процентов получил неверный результат — 0. Нужна помощь с этим.
с использованием пространства имен std; int SI(int принцип, int скорость, int время){ int...

Я работаю с COM-сервером на Python, используя win32com.client, и мне нужно передать массив строк методу, который ожидает POINTER на SAFEARRAY. Я попытался создать ВАРИАНТ, содержащий массив, но не знаю, как правильно преобразовать его в...

Я пытаюсь передать конструктор класса в функцию подписки ros. Можно ли вызвать конструктор при публикации темы?
класс udpMsg { публика: станд::строка UDP; size_t posOfDelim; std::строковый токен; udpMsg(){}; udpMsg(const...