C++ - Страница 1251

I have the following task:

Develop a hotel reservation system to allow customers to book rooms and control demand for hotel owners. Your program should handle the following events:
BOOK time hotel_name client_id room_count — Book by the client...

I have the following member function in a class

class cls { ... template bool func(...) { // Do something depending on } ... } I want to change func to be private and instead have only the relevant instantiations of func public, e.g something like...

I read and load the code from a open source in Visual Studio 2022 community. There is a statement:

auto param_state = state_.find(c10::guts::to_string(p.unsafeGetTensorImpl())); I got an error:

Error (active) E0135 namespace c10::guts has no...

I would like to specialize a function template such that the return type changes depending on the type of the template argument.

class ReturnTypeSpecialization { public: template T Item(); }; // Normally just return the template type template T...

I have a framebuffer object (FBO) that I create like so

glGenFramebuffers(1, &m_FBO); glBindFramebuffer(GL_FRAMEBUFFER, m_FBO); auto& window_descriptor = m_WindowManager->GetDescriptor(); glGenTextures(1, &m_FBO_texture);...

Is there standard way to include a references section for a doxygen docstring in C++? For example, for documenting references that influenced the implementation, the python library statsmodels sometimes includes a References section in the docstring...

I noticed that libstdc++ often uses a base class for the implementation of standard allocator-aware containers. Especially, some basic functionalities are implemented in a base class that is inherited by the correponding container class, like...

I am trying to set up the Hello World example from the FastDDS tutorial here:

When I run the publisher and subscriber (separate terminals), they can't find each other. I never get the Publisher matched and Subscriber matched lines.

What can I...

I am writing a binary search tree (BST) with bidirectional iterator. To present .end() I have fake node , that is the rightest son of the tree. I have problem with extract: my code works incorrectly whenever it gets to fake node . I made a flag in...

#include // maximum of two values of any type (call-by-reference) template T const& max (T const& a, T const& b) { return b < a ? a : b; } // maximum of two C-strings (call-by-value) char const* max (char const* a, char const* b) { return...

I'm trying to build a dll for the microsoft PICT model:

My objective is to be able to call the model API from another code project.

I modified the makefile in order to produce a dll on windows instead of a so Here are the changes:
Added...

I try to create a socket communication for the FastPIR protocol.

The client side have a PIRQuery query which is a std::vectorseal::Ciphertext type that want to send it to the server.

How can I send the query to the server ? and how the server...

I'm trying to check if all values in nested vector are same/unique. I wrote this program (simplified, but same error):

godbolt link

#include #include #include #include auto main() -> int { std::vector vectors_of_ints { {1, 2, 3}, {4, 5, 6} };...

I have a struct with a union inside. How can I make a get_data() function that should return a bool if(value == input_value::_bool).

enum class input_value { _bool, _1D, _2D, _3D, }; struct input_action { union input_action_data { bool boolean;...

I'm porting existing project code from x64 Linux to equivalent ARM64 machine. However, the function snprint has different outputs on the two platforms. I've reduced my problem down to this small function:

#include #include int main() { const char*...

Recently I created class Square:

=========header file======

class Square { int m_row; int m_col; public: Square(int row, int col): m_row(row), m_col(col) }; ==========cpp file======

#include Square.h Square::Square(int row, int col) { cout...

I have only been working with C++ for a year now and I am hoping to gain a better understanding of abstraction with my current project. I created a Black Jack card game from my book 'Beginning C++ Through Game Programming'. The game works, but I am...

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 want to add a simple python interface on a large c++ project so that I can call some c++ functions using python. It is a large c++ project and the structure is like

FastBN -src // many source files inside -include // many header files inside...

I'm trying to make a png file reader in c++. I understood about the chunk structure but I'm struggling in understanding how to read the data in IDAT chunk to get each pixel color. This is my data

width: 16 height: 16 bit depth: 8 color type: 2...

I am serializing a set of contents, indexed by multiple properties using boost::multi_index_container, and a params struct, into a binary archive which I want to deserialize latter. But the archive created using boost 1.74 is unreadable (Invalid or...

I was trying to understand when the memory owned by shared (smart) pointers are cleared on calling execv() from the code.

Assume the following code:

#include class Test { public: ~Test() { std::cout

Источник:

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...

I need to call the C class object like this -

int main() { C c1; C c2; } I have this code so far -

template class A { ..... }; template class B { ..... }; template struct Pair // wrap a generic type { pair p; } template class C { tuple v; //...

So i need to install Qt Creator 3.2.0 and build a project. But, when i try to open the project right now, it is saying Could not find qmake configuration file default .

Here is my version info:

Qt Creator 3.2.0

Based on Qt 5.3.1

Built on...