C++ - Страница 1245

I'm having an issue working with Leptonica version 1.80.0 on a Red Hat 9 machine. I'm using the function pixDeskewGeneral(...) to deskew some images before being processed by Tesseract for OCR text extraction.

This function works great with images...

I have e.g. struct (structure) in C/C++ something like,

struct _Token { _DataTypes Type; std::string Value; }; in C++ 14

But I want I want Value would be (std::string || char): Value; , how can I done that without union or things like that?...

I have a templated struct and I want to speed compilation times by separating declaration and implementation, using explicit template declaration (I'm using Kokkos 4.1, with Cuda backend, GCC 11.3 and Cuda 11.8).

I have a struct that looks like...

Here is my code.

#include struct Node { int x; }; Node f(int A, int B) { if (A 0) return {0}; return {C / D + (C % D != 0)}; } int main() { int n; scanf( %d , &n); f(1, 1); Node t = g(-1, n); printf( %d\n , t.x); } Then I use: g++-13 tmp.cpp -o...

I want to place a function void loadableSW (void) at a specific location: 0x3FF802 . In another function residentMain() I will jump to this location using pointer to function. How to declare function loadableSW to accomplish this. I have attached...

I have two classes a Parent class and a Child class (inheriting from the Parent class) I would like to know if it is possible to cast/transform a Child** to a Parent** with reinterpret_cast or something else? Or such thing is not possible

Below is...

I wanted to check whether a g++ compiler-flag exists that warns me about nullpointer-dereferencing. When compiling this code with g++ (GCC) 13.1.1 and these compiler flags: -Wnull-dereference , -Wnonnull , still nothing happens. No warning, no...

The following code snippet fails to compile:

struct HasOperatorMinus { int v; HasOperatorMinus operator-(HasOperatorMinus o) { return operator-(this->v, o.v); } }; auto f(HasOperatorMinus a) { return a - a; } says

:3:80: error: too many...

i write a shared lib,named libTest.dll(windows) and libTest.so(ubuntu)，when a executable program link the shared lib.how did i write the cmakelists.txt，just give the lib name 'Test' ,then it can automatically link to the correct shared lib like...

#include #include #define BLOCK_SIZE 5 template class vec { T*ptr; int size; int capacity; public: vec():size(0),capacity(BLOCK_SIZE) { ptr = new T ; } vec(int size1) { capacity=size1; ptr = new T ; } void push_back(T val) { if(size==capacity) {...

for(int nu = 0; nu < 20; nu++) { for (int i = 0; i < n; i++) { for (int j = 0; j < m; j++) { double matrixPtr = matrix .first; double matrixPtrSecond = matrix .second; double localReS1 = 0.0; double localImS1 = 0.0; for (double theta = 0; theta <...

I am creating wrapper functions, that modify existing functions (targets). The targets are determined at runtime as pointers without type information ( void* ). Each of them has different parameters and return type. The wrapped functions are called...

my message class is looks like this ..

message Custom { string src; float xPos; float yPos; bool target; } i have extended the UdpBasicApp to send the this custom message class..

In sendpacket() ..i have code like this ..

const char*...

một dãy số ban đầu rỗng. Người ta lần lượt Q thao tác, ở thao tác thứ i người ta chén thêm bi số ai vào cuối dãy số. Sau khi thực hiên Q thao tác, hãy cho biết số nhỏ thứ k trong dãy có giá trị bao nhiêu. điều kiện: 1≤Q≤10⁵, 1≤ai, bi≤10⁹, 1≤k≤ b1 +...

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 was told to use the singleton pattern instead of having global objects, which have the “static” storage duration, to avoid the static initialization order fiasco. But now that I have C++20 modules, should I?
Static initialization order fiasco...

I have two applications, one server and other client, both written in C++ and Qt, but both of them also uses a C library that uses C socket methods to perform a socket communication between them (and this all in Linux).

When both of them are...

I was told to use a disassembler. Does gcc have anything built in? What is the easiest way to do this?

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I'm trying to figure out how it is possible to receive an OpenCV image from a Python in C++. I'm trying to send a callback function, from C++ to my Python module, and then when I call a specific python method in my C++ app, I can access the needed...

I am trying to reduce the run-time of this code as much as possible. I have never done parallelization in C++. I would appreciate your help in figuring this out. I can run the code on VSCode or CodeLite on a 64-bit Windows machine.

#include...

I'm using thrust to deal with GPU arrays. Here is a toy code to demonstrate the problem:

$ cat ss.cu #include #include #include #include struct A { float p; A(float p) : p(p) {} template __host__ __device__ void func(T& con) { /// complie error...

I have a spinbox with a default 0 in it. After I click on the spinbox the cursor needs to move after the 0 inside the box. The function bellow is not producing any suitable result.

void CSpinBoxExtra::mousePressEvent(QMouseEvent *event) { if(this...

I attempted to run my MakeFile generated with cmake but ran into the following error:

error: no member named 'par' in namespace 'std::execution' std::execution::par, ~~~~~~~~~~~~~~~~^ 2 warnings and 1 error generated. make : *** Error 1 make :...

I am trying to set up VS Code as a C/C++ development environment using gcc/g++ installed from homebrew on my MacBook.

It all works fine. When I run a file, it finds gcc which I installed with homebrew . However, the output is shown in the debug...

Consider the definition of compare_and_exchange_strong_explicit :

_Bool atomic_compare_exchange_strong_explicit( volatile A* obj, C* expected, C desired, memory_order succ, memory_order fail ); I'm confused by the use-case of memory_order fail ....