C++ - Страница 1256

I am trying to build a simple C++ program with xlnt with GNU compiler and Visual Studio Code IDE. I have had some challenges with getting the build environment to include the xlnt libraries, and the problem may be related to that. The program is...

Suppose we are a vehicle manufacturer, and we have an abstract Part class that looks like the following:

class Part { // notice that that all methods are const methods. public: Part():itsPartNumber(1) {} Part(int...

My std::string is UTF-8 encoded so obviously, str.length() returns the wrong result.

I found this information but I'm not sure how I can use it to do this:

The following byte sequences are used to represent a character. The sequence to be used...

In The C++ Programming Language C++ 4th edition, section 6.2.6, it says:

Combinations of R, L, and u prefixes are allowed, for example, uR \*\*(foo\\(bar))\*\* . Note the dramatic difference in the meaning of a U prefix for a character (unsigned)...

Suppose I have Q operations of following kind on a map storing key, value pairs. keys are comparable via operator '

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I use libarchive to create a archive, and the source is a directory, I need create the archive with the same directory tree of the source directory, so I use the archive_read_disk_open and archive_read_disk_descend, but when i create a file with...

I am using macOS and have two copies of llvm toolchain. One of which is apple's fork of llvm installed with xcode-select --install, and the other is installed with homebrew. Each copy of the llvm toolchain should have their own implementation of...

I have two snippets:

for (int i = 0; i 0 && arr 0 && arr

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I am currently working on a small overlay project in Game Maker that I want to always render on top, have a transparent background, and allow clickthrough to the window behind it. Using GML extensions and a DLL has worked for the transparent...

I have a small project which I've refactored into C++ modules. Below is CMakeLists.txt :

cmake_minimum_required(VERSION 3.28) project(myengine LANGUAGES CXX) set(CMAKE_CXX_STANDARD 20) set(CMAKE_CXX_STANDARD_REQUIRED ON)...

I'm following a udacity problem set lesson to compute a histogram of numBins element out of a long series of numElems values. In this simple case each element's value is also his own bin in the histogram, so generating with CPU code the histogram is...

Introduction: I am writing code on Windows server 2022 and I need to get data from the instruction cache on the CPU, are there any ways to do this from Ring 3 or Ring 0 (in assembler or C++)?

My attempts to solve this problem: I tried to get this...

I'm trying to rewrite my driver to the OOP architecture and I'm faced with the problem of calling a method like callback when I don't have any std::XXXX, as well as when arguments to the function itself are passed by a template.

So I have the...

Why code bellow has no problem with a2 but does not compile for z1?

#include // std::nextafter #include // std::numeric_limits int main () { constexpr float a1 {1.f}; constexpr float a2 {std::nextafter(a1, std::numeric_limits::max())}; constexpr...

My team has encountered a deadlock that I suspect is a bug in the Windows implementation of SRW locks. The code below is a distilled version of real code. Here's the summary:
Main thread acquires exclusive lock Main thread creates N children...

I am developing an application that is responsible of moving and managing robots over an UDP connection.

The application needs to:
Read joystick/user input using SDL. Generate and send a control packet to the robot every 20 milliseconds (UDP)...

I'm using NatNet SDK to receiving data from the cameras through tcp connection. In their example code below, it can print the stream data using DataHandler function while waiting for a while(c=_getchar()) loop. I have no idea why the code can both...

Suppose we are a vehicle manufacturer, and we have an abstract Part class that looks like the following:

class Part { // notice that that all methods are const methods. public: Part():itsPartNumber(1) {} Part(int...

I try to find the minimum enclosing circles of shapes in an image. My function find_minEnclosingCircles processes an image to detect contours and then finds the minimum enclosing circle for each contour. I've noticed that to capture all relevant...

I have stepper motor, that I want to control his speed. How is it possible?

I am using an Arduino UNO.
for (i = 0; i

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I want to setup mcp3008 on raspberry pi 4. I took this code

#include #include #include int readMCP3008(int &channel); #define CHANNELS 4 #define SPI_CHANNEL 0 #define REFERENCE_VOLTAGE 5.0 int readMCP3008(int channel) { if (channel = CHANNELS) {...

I'm a beginner in both C++ and OpenGl and trying to learn the latter with this series: When trying to render a triangle the third vertex position displays at 0.0 and doesn't change, no matter what I change it to. The order of which set of floats...

I am having an error with my Visual Studio 2015 C++ project that occurs 39 times, which states:

C2872 'ACCESS_MASK': ambiguous symbol

My issue is that the 'files' in which these are occurring are all Windows files, such as:

winnt.h...

I am trying to run a c++ program on a dev container(docker container). I have attached VS code to that container. The docker container is running SUSE SLES15 SP2. (image: registry.suse.com/suse/sle15:15.2) This is the program:

#include #include...

Context: We are putting some keys that does not expect any future changes or updates unless got compromise, originally these keys are in the server side but for this specific project we will not rely from REST API. We decided to put these keys in...