Questions tagged [c++]
C++ is a statically typed, free-form, multi-paradigm, compiled, general-purpose programming language. This tag should be used for any question which requires knowledge or expertise with the C++ programming language. This is a general tag which is used for any of the C++ language standards (C++98, C++11, C++17, etc.). The question should identify the compiler being used, the operating system, and which of the C++ standards is being targeted.
9,377
questions
5
votes
1
answer
402
views
Print abcabc... in three threads
I want to implement the following case
Input - integer number n
Start 3 threads. The first thread prints 'a', the second prints 'b', the third prints 'c', then the ...
- 397
3
votes
1
answer
193
views
C++ Readers-Writer Lock using Asio's Strands
The locking mechanism is implemented in the class RW_Lock.
The saved_async_completion_handler structure is used in ...
- 133
1
vote
1
answer
53
views
Counting number of time frames in a simulation trajectory file
I have written a function in c++, which accepts an "ifstream" object (file) to read from and a string to match a header token in the file. This way I am counting how many times a token ...
3
votes
1
answer
990
views
Knock down tall buildings
I'm trying to solve the following problem:
As you know Bob likes to destroy the buildings.
There are N buildings in a city, ith building has ai floors.
Bob can do the following operation.
Choose a ...
- 212
-2
votes
1
answer
60
views
C++ compile time polymorphism example [closed]
I found an example using std::variant to provide compile time polymorphism as a possible optimisation to runtime polymorphism in 'Software Architecture Using C++', https://github.com/PacktPublishing/...
- 2,449
4
votes
1
answer
109
views
Packet generation and consumption
I have the following simplification of a program which consists of 2 threads. One thread pushes packets to the back of a deque while another waits for user input before performing a "heavy" ...
- 379
5
votes
1
answer
399
views
Noughts & Crosses (tic-tac-toe) revisited (using C++20 modules)
This is a development of Nought and Crosses (tic-tac-toe) in C++ a learning project in C++. This time using C++20 modules. As before, any suggestions on improvements in style, clarity (or anything ...
- 501
2
votes
2
answers
76
views
Binary search tree with Iterators
One more BST implementation with iterators added. Did not manage to find another implementation with iterators and it is my first attempt at implementing them so thought to check on your opinion:
<...
- 107
2
votes
1
answer
81
views
A recursive_foreach_all Template Function Implementation in C++
This is a follow-up question for A recursive_fold_left_all Template Function Implementation in C++. As mentioned in G. Sliepen's answer, I am trying to implement <...
- 3,996
1
vote
2
answers
262
views
Multi-Client Socket Communication with Thread Pool in C++
I've been working on implementing a multi-client socket communication system with a thread pool in C++. The system comprises three main components: logger.h, socket.h, and thread.h, which handle ...
user274839
1
vote
1
answer
91
views
C++ System data transfer design - Following 1
Based on the previous question regarding Data transfer design, here's a major updated code per G. Sliepen's Answer recommendation per std::variant:
...
- 67
2
votes
1
answer
55
views
A recursive_fold_left_all Template Function Implementation in C++
This is a follow-up question for A recursive_sum Template Function Implementation with Unwrap Level in C++. I am trying to implement a recursive version fold_left ...
- 3,996
3
votes
1
answer
249
views
1
vote
1
answer
131
views
C++ arbitrary base convertor
This is my second C++ program. Again, I wrote it all by myself. I only started learning C++ yesterday.
The concept of the program is simple; it should read input from ...
- 3,014
3
votes
1
answer
140
views
Custom single-header C++ logging library
I started learning C++ recently for game development, and decided to write my own little library for debugging.
Here is the library (snoop.hpp)
...
- 33
2
votes
1
answer
76
views
Yet another std::unique_ptr implementation
I know I haven't implemented many methods, and haven't specialized it for T[], but I just want to see if what I coded is good or bad.
...
- 21
8
votes
3
answers
2k
views
Sieve of Eratosthenes in C++ with wheel factorization
I have written a completely working C++ program for the first time, and I have managed to compile it. I have decided to learn C++ and I have written a C++ program to familiarize myself with C++, this ...
- 3,014
4
votes
1
answer
142
views
C++ System data transfer design
I'm designing a data transferring that supports an IoT framework I'm developing, which targets embedded systems.
A unified communication core is built, wherein each entity of the code can hook its ...
- 67
4
votes
3
answers
1k
views
2
votes
1
answer
82
views
Object pooling class BubbleList
Please review C++ class BubbleList design with performance in mind.
Named BubbleList as pooled (unused) objects bubble to the ...
- 21.6k
4
votes
1
answer
120
views
A slightly unconventional CMake project
Introduction
This is my first CMake project. I had a bit of help with the initial setup but I have since made a lot of changes myself. It's working well but I think I am doing things in a slightly ...
- 341
1
vote
1
answer
188
views
Mouse and keyboard event system
I wrote a mouse and keyboard event system in C++, using the GLFW library to get mouse and keyboard states.
I've been working on a 3D game engine of my own for a long time (about 9 months) and wanted ...
- 303
2
votes
0
answers
52
views
A recursive_depth Function Implementation with Target Type Parameter in C++
This is a follow-up question for A recursive_depth function for calculating depth of nested types implementation in C++. I am rethinking about the proposed ...
- 3,996
5
votes
2
answers
179
views
6
votes
2
answers
1k
views
Avoiding memory leaks and using pointers the right way in my binary search tree implementation - C++
I'm learning C++ and I wanted to test my knowledge by implementing a Binary Search Tree using struct (I know, I’m using C++ I should use classes but I want to keep ...
- 61
1
vote
0
answers
90
views
A CUDA kernel for a matrix product as outer product vectors
To multiply the matrices A and B using the outer product of vectors, we can express each row of matrix A as a row vector and each column of matrix B as a column vector. Then, we can take the outer ...
- 585
8
votes
2
answers
260
views
C++ std::vector Implementation
Implementation of the vector class in C++ for learning purposes. Tried to implement interesting parts from the API shown on cppreference.com, but some elements like ...
- 319
7
votes
2
answers
167
views
shared_ptr implementation code - first cut
I've written an implementation of shared_ptr. It doesn't support weak_ptr (yet) but below is the code. I'd appreciate any feedback, comments.
...
- 71
1
vote
1
answer
143
views
Vulkan application to draw a triangle
I've been following the ever popular 'vulkan-tutorial.com' guide on Vulkan and the result is this program which draws a multicolored triangle. I'm interested in finding out how to make my code more ...
- 171
1
vote
1
answer
119
views
HTTP routing with Mongoose
I'm trying to extend the Mongoose RESTful server example with URL routing.
This code relies on the Mongoose library available here.
This is heavily inspired by the routes class from this question but ...
- 35
2
votes
1
answer
100
views
C++: algorithm that uses fixed-size buffer of data that are produced in stream, faster than the algorithm speed; modified version
This is a, I hope, an improved version of this code, limiting atomic usage (following @GSliepen, @G.Sliepen advice) (NB I'm limited to, at most C++17):
...
- 299
7
votes
1
answer
1k
views
C++: algorithm that uses fixed-size buffer of data that are produced in stream, faster than the algorithm speed
I try to implement this scenario with a producer/consumer multithread pattern and I'd like to optimize synchronization and memory model directive used.
This code originates from a SO question and its ...
- 299
-2
votes
2
answers
120
views
5
votes
3
answers
2k
views
An exercise in Data Oriented Design & Multi Threading in C++
Been working in games development professionally now for about ~5 years, but have only been doing OOP & haven't worked with multi threading before as I'm mostly a gameplay programmer, I've also ...
1
vote
1
answer
85
views
A Model View Controller Pattern implementation. Do I get it right?
I know there has been many questions on the Model-View-Controller pattern, but this question is a follow up on a previous question I asked regarding the implementation of a download manager:
Get files ...
- 205
1
vote
4
answers
254
views
Suggestions on performance
I have following piece of code that is called by a program many thousands of times as part of Monte-Carlo simulation. using gprof, I see that 38% of the time was spent on this function. Are there any ...
- 29
4
votes
2
answers
307
views
fast convert string_view to floating point
The code makes following assumptions:
std::string_view is not null-terminated
there are no exponents, all floating point inputs are in the way 123.123
limiting ...
- 1,480
2
votes
1
answer
62
views
API Implementation guidance and improvement
I have recently made significant progress in overcoming beginner barriers related to using Git, CMake, libraries, and successfully implementing an API in C++. Despite my achievements, I acknowledge ...
user274839
0
votes
1
answer
125
views
C++ slim condition notifier
When writing multi-threading code, one often need the thread to wait for some condition being met. A naive approach would look like this:
...
- 137
5
votes
2
answers
127
views
Get files downloaded asynchronously after double clicking on list item (C++)
The problem I am trying to solve as an exercise is as follows:
I have a UI running in the main thread, specifically a list view with many items. Each item represents a file that the user can download....
- 205
1
vote
2
answers
83
views
An arithmeticable Concept Implementation in C++
This is a follow-up question for A recursive_reduce_all Template Function Implementation in C++. As G. Sliepen's answer mentioned:
...
- 3,996
2
votes
1
answer
72
views
Outcome error handler, inspired by boost's outcome namespace
I'm creating a little library for my pet project that is inspired by Boost's outcome namespace. The main reason why I didn't want to use the Boost version is that I don't like the overhead of ...
- 55
2
votes
1
answer
84
views
Better JVM Bytecode Struct with Serialiser & Parser Without #MACROS
Preamble
I was inspired by this review request to create my own quasi JVM Byte Code Struct, Parser and to top it a bit I also wrote two a quasi executors. Currently, they just print the instructions ...
- 770
2
votes
1
answer
117
views
Command-line parser with built-in error checking
Simple command-line option parser with automatic setting of variables and built-in error checking.
The story is I was working on another new project that had a lot of configurable options, as they ...
- 641
6
votes
3
answers
743
views
C++ Bitwise adjacency matrix implementation
I have tried to implement a bitwise adjacency matrix to represent a graph with a fixed number of vertices.
Instead of wastefully representing each connection with an integer, 64 connections are ...
- 163
8
votes
2
answers
955
views
JVM bytecode instruction struct with serializer & parser
I am writing a java class file parsing & serialization library. As part of that i needed to implement a structure for the JVM bytecode instructions as well as come up with a way to parse & ...
- 81
3
votes
1
answer
85
views
Parallel semi-sequential bottom-up tree traversal algorithm
I'm trying to traverse a tree-like structure from the bottom-up, and in parallel. Due to some other constraints I also have to allow for thread counts that may be lower than the width of a given set ...
- 55
1
vote
1
answer
85
views
Improved Component-Entity-System Using C++
Introduction
I am a newbie, so please take me easy :). I am writing a low-level game engine using C++, GLFW and also OpenGL. This is a continuation of Entity Component System Using C++ I've
...
- 185
9
votes
1
answer
957
views
Geohash library in C++17
GeoHash library in C++17
no allocations and no std::strings. It uses fixed buffer GeoHash::buffer_t.
optimized nearby search, if possible, it search 2x2 or 2x3 ...
- 1,480
2
votes
1
answer
174
views
Entity Component System Using C++
Introduction
I'm a new to C++ so please take me easy :) I am currently working on a low-level game engine using C++, OpenGL, and GLFW; I've implemented the Event System and the Input Manager, which ...
- 185