Questions tagged [c++11]
Code that is written to the 2011 version of the C++ standard, sometimes known by its pre-publication name of "C++0x". Use in conjunction with the 'c++' tag.
1,717
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Use const or constexpr in c++? [closed]
I'm reading some code from https://github.com/ApolloAuto/apollo/blob/266afbf68d83fa6fac7a812ff8a950223f5ab2c0/cyber/record/record_reader_test.cc#L31
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1
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2
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115
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A simple String class and its special member functions
I am learning the behavior of C++'s special member function, using a naive String class as example. (The code is modified from this tutorial) Here is the ...
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3
votes
1
answer
92
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Safely starting and stopping a thread owned by a class
If I have a class running its own thread, I almost always try to write it like the following, with the thread started by the constructor. The reason for this is that an object can never be constructed ...
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4
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167
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RGB Image Utility Class
I am writing a utility class to store RGB images and do a few utility functions as a way to learn C++.
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2
answers
381
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Chess Game with GUI in C++ using SDL2
Introduction
So, I recently completed a chess game with a GUI in Python, using Pygame. Upon research, I learned that Pygame is built on SDL, and since I wanted to practice C++ more, I decided to code ...
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1
vote
1
answer
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Implementing function groups
I have recently decided to build an event library for the Arduino/ESP microcontrollers, the idea is simple - if an action happens, it invokes a function. In the code it requires holding a vector of ...
10
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3
answers
2k
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C++ code for a simple single header logging library
I have been working out on C++ code lately just for fun and decided to make a simple logger in it. The code works fine, but it would be great if someone more knowledgeable could point out any mistakes/...
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2
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591
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RAII POSIX process created by fork
By analogy with std::thread, I've written an RAII POSIX process:
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2
votes
2
answers
158
views
Memento Pattern with abstract base classes and partial restoring only
Here I illustrate the use of the Memento Pattern to restore certain (but not all) data of a class that has data in abstract base classes. A Spellcaster has spells ...
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4
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1
answer
105
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Growable vector on the stack with fixed capacity
Implements most (if not all) applicable member functions from std::vector and std::array
Compatible with C++11, C++14, C++17, C++20
[] operator allows unchecked access, all other member functions ...
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4
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2
answers
172
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Dependency problem with field changes
The Observer Pattern is used here to notify changes in a Person's data. For example, when age changes, the value of can_vote() ...
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3
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1
answer
951
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Wordle game in C++
I am a programmer who likes making clones of games. Having completed a version of Wordle in Python, I challenged myself with making a version of it in C++. This includes a solver as well (add a flag -...
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1
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154
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What can I do better in my C++ serialization implementation?
I want to serialize a class Mango recursively.
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3
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1
answer
98
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Queue using circular linked list
I'm reading through Algorithms Fourth Edition by Sedgewick and doing some of the practice exercises in C++11 instead of Java. Exercise 1.3.29 is to write a Queue that uses a circular linked list, ...
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4
votes
1
answer
830
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Timer thread implementation
I've implemented a timer thread whose job is to call functions at a certain interval. The functions may be called multiple times if their interval > 0 millisec otherwise only one time. Even if the ...
0
votes
1
answer
140
views
Count the number of objects created statically and dynamically in C++
I have written below program to count the number of static and dynamically created object of the class.
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0
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19
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Return type-erased object to the caller, use typesafe cast in a subsequent call [closed]
Libraries might need to return "context" objects to the caller, and then require the same object in subsequent calls. In some cases, the user is not required to know what's the concrete type ...
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3
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689
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Any bettter way to achieve this lookup table?
What I need:
I need a lookup table. Once the keywords are all found, then the value of the std::unordered_map is returned.And I don't care about the sequence of the ...
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2
votes
1
answer
301
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Modify a string by identifying a substring, and replace it and the characters following it with a newly computed substring
I'm working on a string manipulation code in C++ for my internship project, where I have to find a substring within a string and essentially replace it and some characters following it with a newly ...
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1
vote
1
answer
125
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Connect Four in C++
This is a library that implements the logic of Connect Four.
There's nothing related to graphics or user input here. This library is supposed to be integrated into any environment where one could run ...
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1
answer
67
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Data Wrapper Class with Automatic Saving and Locked Read/Write Accessors
This is a wrapper for a synchronized data structure that:
Saves periodically
Keeps track of dirty flag automatically (set when a write access is requested)
Maintains a lock on data
Only allows access ...
- 421
3
votes
1
answer
146
views
Lock-free, thread-safe trie container
This is a Trie data structure for mapping strings to integers or pointers in O(n) time. Based on the idea that we never delete anything from the container, we can perform concurrent read/write ...
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1
vote
1
answer
198
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Low-Latency Multithreaded Logger
My goal was to have a logger that does the blocking file I/O in a separate thread.
A few notes:
I made it a singleton rather than having a global "logger" variable, or a bunch of loggers ...
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2
votes
1
answer
207
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Leaky Bucket Algorithm with no Queue
Basic implementation of a leaky bucket, the idea is you call it by saying I will allow e.g. 5 login attempts per 60 seconds.
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0
votes
1
answer
123
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Decorator Pattern with member functions
Motivation: without SaveDecorator, we would have to write:
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- 1,351
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35
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AI for OpenTTD - Decision Engine: Is this an appropriate use for the state pattern and raw pointers to states?
I'm writing an AI in C++ for OpenTTD. If you'd like to run it yourself, it's on Github here: https://github.com/marlonsmith10/empire_ai.
This class is the decision engine. It will be responsible for ...
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1
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1
answer
100
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Memento Pattern between sister classes
The following is my usage of the Memento Pattern when one class uses the copy constructor of a sister class (a separate derived class of the base class) and wishes to revert to the previous class. ...
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1
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2
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161
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Simple terminal TicTacToe
Coming from JavaScript, I needed to learn C++ recently, so I thought a great way to start is to create a simple terminal-based tic-tac-toe game. I encountered some difficulties especially with multi-...
- 141
2
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2
answers
220
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Accessing multiple dynamic libraries with the same extern C methods
I have multiple pre-compiled dynamic libraries that use the same extern "C" function names. The functions can behave differently for each dynamic library. ...
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2
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1
answer
120
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C++ template and inheritance - Generic Sqrt Decomposition
So I tried implementing a easily extendable solution for Sqrt decompostion, I deduced that only identity value, operation and block update logic change and rest of the code is same. So i created 3 ...
4
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2
answers
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Custom implementation to provide an immutable range of a vector without copying it
Edit: A new and improved version can be found in this question, based on the feedback!
I needed to pass a const reference to part of a std::vector without copy.
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2
votes
1
answer
144
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A proxy class as a generic replacement for getters and setters v2
Have you ever written proxy objects, instead of using a setter and a getter method? In that case, I'm interested in your opinion on the following design for a templated proxy.
This is a second version,...
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154
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C++11(14/17/20) Thread Management
I'm implementing something of a thread janitor in modern C++. What I've got works, and while it's not organized in the way I'd like yet, I'd like some feedback on the fundamentals. Thank you in ...
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2
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454
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How to avoid excessive for loops in C++ [closed]
I have been trying to write a small test program and I was trying to think of any potential optimization I could do, especially if there is any chance to avoid some of the for loops.
The program has ...
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1
answer
257
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Win32 UI with tabs and buttons
I am making a UI library for the fun of it, and decided to use move semantics instead of pointers with new/delete.
Everything is working, but I am not satisfied.
Given this code:
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2
answers
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Time duration conversion with units
I recently was asked to upgrade some C++11 code to add a feature by which the user can set a time duration from the command line of the program. The requirement was to have a default time of 1500 ms ...
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4
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C++11 Custom Vector Implementation
This was my solution to an interview question:
Q: Implement an std::vector style container (does not have to be exactly compatible) with a fixed
buffer and the following requirements and restrictions:
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5
votes
2
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857
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C++ template class to calculate CRC
Here is a template class to calculate various CRC checksums.
I go out my way to achieve a good C++ encapsulation for a C style code .
Any advice or suggestion is welcome.
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2
votes
1
answer
482
views
watchdog for c++11
I created a watchdog/notifier in C++ and wanted to make it better so it could be used by multiple people. The idea is that there is a timer class and event. client create events and pass a lambda ...
0
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1
answer
488
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The Abstract Factory design pattern as a Database Operations program
File - DatabaseOperations.h
This file contain classes representing database operations for three different types of databases (relational, document based and graph based) like establishing connections,...
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votes
3
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249
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Factory Method Design Pattern Implementation as a Coffee maker program
File: InfoFactory.h contains four classes.
CaffienatedBeverage is an Abstract class with one pure virtual function Name. It ...
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votes
3
answers
922
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Connect to telnet server
I've just started to learn C++.
I have this class and I don't know where to put the following two lines because of the catch:
delete[] chost;
delete[] cport;
I ...
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3
votes
2
answers
276
views
An implementation of the PIMPL idiom [closed]
I would like to ask you to verify the following implementation of the PIMPL idiom. In this dummy implementation the stream is read into a string.
X.h
...
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0
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template Matrix class with Static or dynamic size
I started implementing the folowing Matrix class in order to get a better understanding of templates classes in general. For now, it lacks a lot of features, it does very basic things:
addition
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2
votes
1
answer
61
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Decoupling receiving data and processing data by passing callback and shared_ptr
Sorry for my poor English. I want to decouple receiving data and processing data, this is the demo code:
...
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3
votes
2
answers
403
views
C++11 ThreadPool implementation
A new version of this code based on the provided advice can be found here.
Latest improvement is found here.
I made a simple ThreadPool implementation in C++ using ...
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3
votes
1
answer
387
views
Conditional Output Streaming in C++
I stumbled into an idea for creating a simple class that would entirely avoid streaming of any data unless some condition is met. The idea here is that a ...
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13
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1
answer
1k
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Simple NAPI wrapper around self written C++ msgpack, horrible performance
I have written a relatively small msgpack implementation in C++, with performance that is not too bad, so I decided to write a NAPI wrapper around it, but the performance is just horrible. I am ...
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2
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1
answer
284
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Simple Rock Paper Scissors
I made a Rock Paper Scissors game. It works fine but I would like to know how can I improve it further.
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6
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3k
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C++ implementation of depth-first search
I got the C++ implementation of depth-first search (DFS) from here and made slight modifications to it. The modified code is as follows:
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