Questions tagged [c++14]
Code that is written to the 2014 version of the C++ standard. Use in conjunction with the 'c++' tag.
448
questions
2
votes
2answers
89 views
Reactor pattern in modern C++. Please comment on coding improvements to be done
The reactor possesses its own thread to wait for messages in an event loop.
Users should be able to start or stop the reactor at any point. These two operations are not required to be thread-safe.
...
2
votes
1answer
69 views
Implementing toggle button using Qt
I have below code for implement toggle button.
After including below code, processing power consumed over 90% in my embedded application.
Is there any way to reduce this processing power.
...
2
votes
1answer
79 views
Code to sort based on quantities of a data member occuring
The setup is that I have a vector of a class, and I need to sort it by the quantity of a data member value, not the value itself. The below code exhibits the correct behavior, and part of that ...
6
votes
0answers
72 views
Implementing GSL synchronized_value
Core Guidelines mention a type synchronized_value<T>, which supposedly pairs std::mutex with the internal value. I couldn'...
5
votes
1answer
107 views
Meta functions for sequences of exponents of 2
I have implemented some meta functions to create sequence for exponents of 2. I would love to know if there is any way to make the code more optimized.
Note: ...
2
votes
1answer
64 views
C++ reactor bad implementation
folks.
I have recently started writing software using Modern C++ 11-14. I have been developing software for more than a decade and just wanted to broaden my skillset. I am practicing building some ...
2
votes
1answer
268 views
Simple C++ Telegram Bot
Hi :) I am a beginner coder who just learnt C++ and I wanted to apply it in projects to solidify my learning process. However, I only took a short tutorial before trying this out hence I'm pretty ...
2
votes
1answer
92 views
Generate binary image using coordinate vectors
I have a matrix M of size [n_rows, n_cols] and a list of x and ...
3
votes
2answers
101 views
Benchmarking insertion sort
More than once I claimed that using binary search doesn't improve performance of the insertion sort. For example, see answer here and comments here). Now I have time to substantiate my claim.
The ...
4
votes
2answers
108 views
Rolling median function (Daily Coding Problem 377)
Given an array of numbers arr and a window of size k, print out the
median of each window of size k starting from the left and moving
right by one position each time.
For example, given the ...
23
votes
11answers
6k views
Find nth Fibonacci Number, using iteration and recursion
I'm a beginner programmer and I came upon this problem which is to find the nth number in the Fibonacci series.
I used to solve the problem using a for loop; ...
3
votes
1answer
70 views
Substitution Cipher: Which One?
I'm a beginner and I have a question (somehow silly and stupid :) ). Today I decided to challenge myself and I came around the challenge that wanted me to create a program that ciphers (or encrypts) ...
2
votes
1answer
116 views
Get word frequency of a txt file and save it to linked list
I'm a novice in C++. I want to do three things:
Get the number of lines in the file
Get the number of total words in the file
Get each frequency of each "unique ...
3
votes
1answer
83 views
Unique and shared resource owner
I need a unique_ptr and shared_ptr like structure, but instead of pointers, I would like to store some kind of reference to a ...
2
votes
1answer
69 views
Header only HTTP client library that is a wrapper around CURL
For learning purposes, I wanted to create a header-only C++ wrapper library around HTTP CURL functionality. At the moment the library only implements GET and POST, but I will add other HTTP methods ...
4
votes
1answer
93 views
Signal slot mechanism in C++14
Implementing signal slot mechanism again seems quite
dumb because there are so many people already done this
before but it is for learning and I intended some specific
goals.
I had some library in ...
4
votes
1answer
119 views
Find positive integer with a minimum number of binary 1's such that its bitwise AND with all array elements is not 0
Task
You have an array of positive integers. Your task is to find an
integer x such that the following are true:
Bitwise AND between ...
3
votes
1answer
113 views
Matrix class with overloaded `operator[]`
I have implemented a Matrix class that allocates memory using unique_ptr. How to make it more diverse and optimized in terms of memory usage and efficiency?
...
2
votes
1answer
78 views
Subset Component Task
I've solved a problem Subset Component
Problem
You are given an array with n 64-bit
integers: d[0],d[1],….,d[n-1].
...
2
votes
1answer
76 views
5
votes
2answers
118 views
BrainF**k interpreter in C++
This question is the adaptation of this question in C++. (I'm the author of that code as well).
The code:
...
3
votes
1answer
110 views
Cave Setup for Hunting the Wumpus
I am a hobbyist programmer trying to learn modern C++. My son had an assignment in his C++ class to fill in some functions that populate draw the cave in the "hunt for the wumpus" game. When I viewed ...
17
votes
5answers
7k views
Banking system in C++
I've created a program for Banking System in C++14.
You are given 9 options:
Open Account
Close Account
Show All Accounts
Deposit in Account
Withdraw from Account
Transfer to an Account
Show Balance
...
4
votes
0answers
73 views
Tic Tac Toe with different level AI
I've already created a code in python here with almost the same logic:
Tic-Tac-Toe with changeable board size (Part 1)
Tic-Tac-Toe with changeable board size (Part 2)
Here's the code in C++. As I'm ...
2
votes
1answer
109 views
Prim's Algorithm - Minimum Spanning Tree
I have implemented Prim's Algorithm from Introduction to Algorithms. I have observed that the code is similar to Dijkstra's Algorithm, so I have used my Dijkstra's Algorithm implementation.
Please ...
2
votes
0answers
34 views
A lightweight version of std::shared_ptr<T> V2
This is a lightweight version of std::shared_ptr<T> called res_ptr<T>
This post is a continuation of:
A lightweight ...
7
votes
2answers
340 views
A lightweight version of std::shared_ptr<T>
I wrote a simple lighter version of std::shared_ptr<T> called res_ptr<T>.
...
7
votes
1answer
118 views
An explicit cast for narrowing numeric conversions
Inspired by gsl::narrow_cast, I created my own implementation with the addition of a couple of features:
a static assert on the types to ensure the cast is actually narrowing (if future changes to ...
8
votes
2answers
3k views
Implementation of A* algorithm in C++
I have implemented the A-Star path finding algorithm for a 2D grid. The function returns a list of positions of an acceptable path.
main.cpp :
...
6
votes
3answers
460 views
constexpr SmallVector - std::vector like container on the stack
2 years ago I did this:
SmallVector - std::vector like container on the stack
now, 2 years later, I am reinventing the wheel again, this time with fully constexpr SmallVector.
This time, because I ...
9
votes
3answers
957 views
Count the frequency of integers in an array
I recently reviewed a question here on Code Review. The problem statement is
Write a program that prompts the user to input ten values between 80 and 85 and stores them in an array. Your program ...
4
votes
1answer
160 views
Function composition in C++
My aim was to create a function which behaves like the operator . in Haskell.
Here is what I made:
...
3
votes
1answer
83 views
Multithreading Ticket class to wait for parallel task completion
I've implemented a "Ticket" class which is shared as a shared_ptr between multiple threads.
The program flow is like this:
parallelQuery() is called to start a new query job. A shared instance of ...
4
votes
0answers
60 views
C++14 AtomicRoundRobinPool for sharing a pool of keys
The idea here is that we have some resource that is relatively very expensive to generate, but once we have a bunch of them in a pool, we can keep reusing them instead of generating new ones. "HTTP ...
8
votes
1answer
336 views
Detecting existence of a class member
I wanted to detect if I have a member in a simple POD struct and after some searching and merging some methods I found on the web I've come up with this solution:
...
3
votes
2answers
136 views
“When to take medicine” CodeChef Challenge MEDIC
I just submitted this code to solve the "When to take medicine" challenge on CodeChef:
...
6
votes
2answers
158 views
String manipulation with std::adjacent_find
For the given strings (not containing numbers), print their shortened
versions, where each adjacent sequence of the same characters longer
than 2, change to an expression consisting of a sign and ...
3
votes
2answers
84 views
c++14 move constructor and assignment in simple list
I’m moving from c98 to c++14 and I’m trying to figure out how to write move correctly.
I just wrote the simplest list with no functionality, just testing the construction and copy behavior. I would ...
35
votes
8answers
12k views
Thread Pool C++ Implementation
I have been working on this thread pool for awhile to make it as simple to use as possible. I need some tips on improving performance, and some good ways to test its performance. I was wondering if ...
-1
votes
1answer
60 views
Determine if matrix exists or not [closed]
any help with optimizing following code to make it run faster.
Tried making function inline, tried cin.TIE(NULL), tried ios_base::sync_with_stdio(false);
...
1
vote
1answer
185 views
AVL tree implementation using shared_ptr/unique_ptr
I have implemented an AVL tree using shared_ptr. I know that there is an overhead regarding using shared_ptr and instead a unique_ptr could be used. But the thing is that my node contains also a ...
14
votes
1answer
2k views
128-bit unsigned integer
This implements 128-bit unsigned integer using C++14.
It works on MSVC and 32-bit architectures being complementary to the unsigned __int128 type provided by GCC ...
4
votes
0answers
55 views
Safe pointer casting : static_cast or dynamic_cast
Context: I'm using the clone pattern for creating copies of polymorphic classes which may use virtual inheritance (I hope to get rid of the latter). So when calling ...
2
votes
0answers
712 views
C++ Producer / Consumer multi threads pattern with maximum container size
I've just written a Producer / Consumer pattern templatized that should work in multi threads environment (IE producer(s) and consumer(s) in separate threads).
The original use case is one producer ...
2
votes
1answer
756 views
`std::optional` under C++14 v1
This is a first version of an implementation of std::optional it is supposed to compile under C++14. The public interface of the class is complete, but there are ...
3
votes
1answer
63 views
(Follow-up) Project Euler #11 Largest Product in a Grid | Cache-optimized + sliding window (C++14)
Original code review: Project Euler #11 Largest Product in a Grid | Cache-optimized + sliding window (C++14)
Source: HackerRank & ProjectEuler.net
Problem: Largest Product in a Grid
In the 20×...
2
votes
2answers
66 views
Project Euler #11 Largest Product in a Grid | Cache-optimized + sliding window (C++14)
Source: HackerRank & ProjectEuler.net
Problem: Largest Product in a Grid
In the 20×20 grid below, four numbers along a diagonal line have been marked in red.
...
5
votes
2answers
169 views
Code to find the sums of building heights
Remains
You've recently stumbled upon the remains of a ruined ancient city. Luckily, you've studied enough ancient architecture to know how the buildings were laid out.
The city had \$n\$ ...
4
votes
1answer
168 views
Builder pattern that forces all members to be initialized at compile-time [closed]
This java answer made me wonder whether it would be possible to implement the builder pattern in C++ in a way that checks at compile-time whether all necessary members of the constructed object are ...
9
votes
1answer
153 views
Quicksort template (for sorting corresponding arrays)
I needed a function for sorting two corresponding arrays. So I wrote this code to sort N corresponding arrays!
The really "metaprogrammy" way to do it would be to use ...
