Questions tagged [c++14]
Code that is written to the 2014 version of the C++ standard. Use in conjunction with the 'c++' tag.
439
questions
4
votes
2answers
90 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 ...
22
votes
11answers
5k 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
64 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
68 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
80 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
60 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
75 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 ...
3
votes
1answer
111 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
84 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
68 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
73 views
5
votes
2answers
111 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
102 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
6k 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
61 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
93 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
30 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
307 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
92 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
2k 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
192 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 ...
8
votes
3answers
935 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
111 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
70 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
59 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
329 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:
...
2
votes
2answers
93 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
147 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
81 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
8k 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
133 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 ...
13
votes
1answer
1k 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
50 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
521 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
412 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
62 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
64 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.
...
4
votes
2answers
130 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
117 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
141 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 ...
5
votes
1answer
102 views
SplitSort — An adaptive algorithm to handle collections with few inversions
SplitSort
SplitSort is a rather simple Inv-adaptive and Rem-adaptive sorting algorithm described in Splitsort — an adaptive sorting algorithm by Christos Levcopoulos and Ola Petersson. The paper ...
5
votes
2answers
114 views
Automatic RAII wrapper for concurrent access
Probably many people had to work with multithreaded applications with C++ and can understand how messy can be fine-grained locking of objects.
So once in a while I came to idea of implementing some ...
4
votes
5answers
1k views
Largest binary gap
I took a task from Codility to find longest sequence of zeros in binary representation of an integer.
For example, number 9 has binary representation 1001 and contains a binary gap of length 2. ...
3
votes
1answer
89 views
C++ template-based dimension-tagged type
I'm writing a small C++14 library for myself that allows me to decorate a type with dimensionality information, so that I can leverage the template/type system to avoid mistakes such as adding ...
3
votes
2answers
199 views
Simple Matrix Template Class
I wanted to make a matrix template class to see if I can learn how to use templates, work on figuring out the indexing in loops, and making an interface so the user can know if an operation will work. ...
12
votes
2answers
238 views
C++ data type to store and manipulate individual bits
The use cases I’m facing require me to have a C++ data type that can store and manipulate the state of somewhere between 400 and 500 bits. In addition it is necessary to be able to store that state ...
3
votes
1answer
2k views
HackerRank: Fraudulent activity notification
I wanted to get some constructive feedback on my solution to the Fraudulent Activity Notification problem from HackerRank:
HackerLand National Bank has a simple policy for warning clients about ...
4
votes
3answers
190 views
Stable-sorting all even numbers before odd numbers in a linked list
Given a Linked List of integers, write a function to modify the linked
list such that all even numbers appear before all the odd numbers in
the modified linked list. Also, keep the order of even ...
3
votes
1answer
105 views
Advent of Code 2018 Day 13 - Detect mine cart collisions
This is a solution to Advent of Code Day 13 (problem specification, test input), for which I was asked to read a layout of tracks and mine carts and detect 1) where the first crash would occur and 2) ...
