C++ - Страница 1253

I'm working on a C++ application which uses a library written in C by another team. The writers of the library like to call exit() when errors happen, which ends the program immediately without calling the destructors of objects on the stack in the...

I am trying to call InitCommonControlsEx() in the main entry of a window program, and although I included the header and linked to the ComCtl32.Lib, for some reason the compiler underlines that function as undefined. Following is the code......

Using C++ on a Raspberry Pi 4, I'm building a single routine called monitor to watch my GPIO lines and log changes for all lines. My simple code using libgpiod:

void monitor() { const std::string chipname = gpiochip0 ; const std::vector offsets =...

I'm using IWICImagingFactory::CreateDecoderFromFilename() for reading only. Is there a way I can pass something like the FILE_SHARE_READ flag? The file stays open from the function call above until the program terminates.

During another operation...

I'm quite new to C++, and I have a question regarding a better way to write something I'm trying to do. I have a problem where I have text file where each line is and attribute of and object, structured something like this:

book 1984 An award...

I have made a cpp dll which performs encryption decryption using crypto++ Library. Now I have come to know that this dll is to be used in a c program . My dll is based on x64 arch in visual studio. How do I do this use case.

I tried using load...

This is about how to convert a 3d model to a polycube structure. This paper already provides some parts of code,but I can't get the right answer.

I have get the result like this: enter image description here but i expect all the plane should be...

my code is currently displaying voltage, temperature, and current readings worth 0 on the arduino serial monitor. whereas last month the same code could display complete values. but now the values displayed are as follows

16:29:00.356 -> { ID :1,...

I've attempted to make a 2D collision simulator with variable squares that should run into each other. My code is able to work in one dimension in both the x and y axis or with one square going in the x axis and one square going in the y axis....

I have a (very) legacy c++ program that uses a character array, and then subsequently concatenates to the variable.

char FileName ; strcat(FileName, /home/ ); Despite not being initialized (this is not static or anything, just within a function...

Why am I getting the following linker error when using clang with libc++:

$ clang++ -stdlib=libc++ po.cxx -lpoppler /tmp/po-QqlXGY.o: In function `main': po.cxx:(.text+0x33): undefined reference to `Dict::lookup(char*, Object*, std::__1::set*)'...

I've been learning C++ and using the Terminal for the last couple of months. My code was compiling and running fine using g++ and C++11, but in the last couple of days it started giving errors and I have had problems compiling since. The only...

I'm working on a program for a class. The prompt is Write a program that asks the user their name and the diameter or the pizza they want, calculate the area of the pizza using PI to four decimal places (3.1415) but show the area of their Pizza to...

I am trying to include Boost Libraries in my C++ script after installing it, but I am getting the following error message by the intellisense:

#include

'boost/iterator/counting_iterator.hpp' file not found clang(pp_file_not_found) I have...

I need help with the following problem:

The goal is to create a torus from its parametric equation.

x(θ,φ) = (R + rcosθ) cos φ

y(θ,φ) = (R + rcosθ) sin φ

z(θ,φ) = rsinθ

With the above equation it is straightforward to generate triangles...

I'm reading a C++ function that handles timestamps, and there's an expression like this:

t % (60 * 60) % 60 I thought this expression was strictly equivalent to:

t % 60 However, when I entered this code into I found that gcc did not think so....

I'm using Xcode 14.3 on macOS 13.3.1

When I try to launch my project with Instruments for Profiling, it is launching an arbitrary copy of a bundle with the same bundle ID.

As this project has been in active development for sometime, I have the...

I have been developing a calculator from scratch.

I have gotten to the part where i need to render numbers/symbols on the buttons and displaying them but I realize I need SDL_TTF for that, which I do not have when I downloaded SDL2

I downloaded...

void MyGraphcisItem::updateChildItems() { QList items = this->childItems(); **updateChildItems(); } } QList items = this->childItems(); It takes too long. The more items there are, the longer it takes. Is there a way to avoid it? Actually, I wonder...

I'm writing C++14 code which needs to deserialize objects as fast as possible.

The serialization is in memory and occurs in the same process as the deserialization.

Consider this:

struct Base { Base(const int a) : a {a} { } int a; }; struct...

there is a code as below in the version 2.6.24 of kernel:

unsigned int __kfifo_put(struct kfifo *fifo, unsigned char *buffer, unsigned int len) { unsigned int l; len = min(len, fifo->size - fifo->in + fifo->out); /* * Ensure that we sample the...

I have a executable of C++ Qt project and I want to assign a checksum to it for documentation purpose so that I add can details like

Software Version : 1.5

Checksum : 0xBd3429A

The checksum should change whenever i update my project like...

Given a range of ints, I want to get all subranges where b - a

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As i said before i get an error when i run VimspectorInstall vscode-cpptools In the Screenshoot 1 I don't understand why python can't run these files and I don't know where to start. When I enter the checkhealth command I get the following.In the...

I am trying to specialize a templated function with a functional argument, but the compiler is unable to infer the proper specialization. I get compiler errors unless I am explicit about the function type.

#include int data; using MyFunction =...