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66 votes
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Easier user input in C++

namespace std Others have said this already but it's important enough to be repeated: Don't put your own definitions into ...
5gon12eder's user avatar
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39 votes
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Thread Pool C++ Implementation

Funny how the universe works - I just finished my own implementation of a thread pool (albeit in C++17), and it looks a lot like yours. I found this question on the front page when I went to post my ...
osuka_'s user avatar
  • 517
39 votes
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Find nth Fibonacci Number, using iteration and recursion

Why do most people (on the internet) recommend using recursion because it's simpler and easier to write the program? Logically I thought that we should write it in a way that is fast and simple. This ...
Eric Lippert's user avatar
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36 votes
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Banking system in C++

Overview The code is OK. I found 1 bug. The encapsulation is slightly lacking. You have Account as a class, which is good, but the getters/setters are not required and you have better methods to ...
Martin York's user avatar
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26 votes
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Tic Tac Toe in C++14

Here are some observations and suggestions that may help you improve your program. Check your spelling If you run a spell check on your comments, you'll find a number of things such as "peice" ...
Edward's user avatar
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25 votes
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Simple NAPI wrapper around self written C++ msgpack, horrible performance

Profiling: We could use a library like Tracy to do the sort of profiling you mention in the question. But it's quicker to ask "what's taking the most time" and get an answer with a profiler ...
user673679's user avatar
  • 11.6k
17 votes

A dice game called "Greed"

Style You're not being charged by the character; there's no need to abbreviate "count", or "ret" (which I would call "score" instead). Also, main has inconsistent brackets with the rest of the ...
Errorsatz's user avatar
  • 1,354
17 votes
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TString - An implementation of std::string

Justify text. (.rjust, .ljust, center) That is becoming a "fat interface". These functions should be generic algorithms that can work with any string class, including yours, ...
JDługosz's user avatar
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15 votes
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"contains" function for STL containers

If you like new features, and even experimental features, you can make your code a lot cleaner. Concepts A lot of those arcane SFINAE techniques will be obsolete once ...
papagaga's user avatar
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15 votes
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Ring Buffer Implementation in C++14

Coding idiomatically Remember that #pragma once isn't standard (unlike include guards). If you only intend your class works on major compilers, you can use ...
Calak's user avatar
  • 2,323
14 votes

Implement an algorithm to determine if a string has all unique characters

If I'd asked an interview question, and got this as an answer (at least as the first answer) I think my immediate reaction would be to consider it excessively clever. To make much sense, along with ...
Jerry Coffin's user avatar
  • 33.5k
14 votes

128-bit unsigned integer

std::uint64_t is consistently misspelt throughout the code, and may be a poor choice anyway (since an exact 64-bit type need not be provided). It's better to use ...
Toby Speight's user avatar
14 votes

Thread Pool C++ Implementation

@osuka_ and @anderas gave some very good advice. I just have a couple things I want to add: Macros #define MAX_THREADS std::thread::hardware_concurrency() - 1; ...
Kevin's user avatar
  • 241
14 votes
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Porting C-style socket to CPP class

Avoid using malloc() in C++ There are much better ways to allocate memory in C++ that are simpler and safer. First, in C++ you should use ...
G. Sliepen's user avatar
  • 50.6k
12 votes

Safe strcpy implementation with C++

Break out your type trait You have this large amount of is_same checks in a couple places. Break it out in its own trait, and call it something like ...
Barry's user avatar
  • 18.4k
12 votes
Accepted

Implementation of the linked list data structure in C++

Namespace #ifndef LINKEDLIST_H #define LINKEDLIST_H The term "linked list" is a common term. So I would expect somebody out there is already using the macro <...
Martin York's user avatar
  • 94.3k
12 votes

Thread Pool C++ Implementation

You've received good style advice so far. But your pool doesn't work. So let's try to address that. 1. 'resize' is both wrong and not needed. As others mentioned, it's not thread safe. Making it so ...
Sam's user avatar
  • 221
11 votes

Easier user input in C++

namespace std is reserved. Don't add stuff to it. Especially since there's no reason to in this case. Just put it in your own namespace. unnecessary string usage ...
Barry's user avatar
  • 18.4k
11 votes

Easier user input in C++

I've actually implemented the same functionality in the past, so here are my comments. Wrong behaviour? It depends on what you can consider wrong. Consider running your own example and inputting <...
cr_oag's user avatar
  • 565
11 votes
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Filtering variadic template arguments

One reason you think you require a lot of helper metafunctions is that you haven't clearly separated the code for solving the problem (filtering a list) from the code for testing the solution (e.g. <...
Quuxplusone's user avatar
  • 19.3k
11 votes
Accepted

Ford-Johnson merge-insertion sort

First of all, there is an error Not a fatal error though since the algorithm still sorts the collection properly, but it actually means that the algorithm doesn't perform as few comparisons as it ...
Morwenn's user avatar
  • 19.9k
11 votes
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Sorting algorithms - Bubble sort

I recommend putting your functions into a namespace. for (auto i = begin + 1; i != end; ++i) { By doing begin + 1, you ...
Justin's user avatar
  • 3,285
11 votes

Sorting algorithms - Bubble sort

std::swap(val1, val0); This hard codes std::swap as the function to use for swapping. C++ also has a powerful (and sometimes ...
Daniel Jour's user avatar
  • 1,581
11 votes

Sorting algorithms - Bubble sort

Speed Of course we all know bubble sort is one of the slowest sorting algorithms1. It turns out, however, that stopping when an iteration is completed without a swap usually adds more overhead than ...
Jerry Coffin's user avatar
  • 33.5k
11 votes
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Advent of Code 2017, Day 1: Sum of digits matching the next digit (circular list)

I think std::rotate can lead to a somewhat simpler approach: get the input create a copy rotate the copy by one element Accumulate the sum of elements that match ...
Jerry Coffin's user avatar
  • 33.5k
11 votes

Solution to Project Euler Problem #37 in C++: Truncatable Primes

Warnings It is usually a good idea to compile your code with all warnings enabled to see if anything is wrong. In your case, nothing really worrying but we may as well fix it. ...
SylvainD's user avatar
  • 29.2k
10 votes

Safe strcpy implementation with C++

Gotcha There is a potential for illegal access. While the code guarantees that the destination buffer is not overflown, it will however access beyond the source buffer if it is smaller than the ...
vnp's user avatar
  • 55.9k
10 votes
Accepted

Simple log writer class

The code is pretty good, and quite readable. Here are some of the things I noticed: Header guards Your Logger.h needs header guards: ...
Justin's user avatar
  • 3,285
10 votes

Sorting algorithms - Bubble sort

I'll add this since nobody mentioned it: the code will cause undefined behavior on empty ranges. Th reason is that i != end will not properly work since ...
Incomputable's user avatar
  • 9,374

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