General C++ Programming - C++ Forum (Page 2)

by George P

A moved C++ container and MSVC++ (1,2)

#include <iostream> #include <vector> int main() { std::vector vec1 { 1, 2, 3, 4, 5 }; ...

[20 replies] Last: This is my take on ' valid but unspecified state ': valid : operatio... (by JLBorges)

by woohyeon

fwrite(Buffer, sizeof(A), N, fp) vs fwrite(Buffer, sizeof(A) * N, 1, fp)

I have a byte array which stores a lot of struct data. When I use fwrite function, which is more ...

[7 replies] Last: If you only write as one object then you either have a successful wri... (by dhayden)

by salem c

PID controller setup for each cores of the CPU

Dirty toerag "Walker154" edited with the spam.

[1 reply] : how many variables are in your state? This sounds like it could be si... (by jonnin)

by Geckoo

OpenGL

Hello everyone. I have a question about 3d development having made my own 2D engine without any depe...

[3 replies] Last: I don't think Vulkan will make OpenGL obsolete, or that OpenGL w... (by kigar64551)

by SomeStudent

"for (int i" vs "for (i"

Is there any reason why choose one over the other? int i; for (i=0; i<10; i++) { // instruction...

[18 replies] Last: Yeah - but in C++ a ref is just a pointer 'under the hood'... (by seeplus)

by Wallby

A predefined macro for macro recursion in c?

Hello, I read that traditionally recursive macros were possible in c but that is no longer the cas...

[12 replies] Last: Many education systems (especially in the UK) seem to teach Java as a ... (by seeplus)

by t im

About the End of Multi-level Pointer

Just as the code below: int a = 1; int *p0 = &a; int **p1 = &p0; ...... Then, where is the ...

[4 replies] Last: Thanks all the answers. I got it. (by t im)

by DOOMReboot

Best Design Pattern(s) to Load Binary File

I've got an old game data file that contains binary data and would like your opinion as to which des...

[2 replies] Last: have you considered the kiss design pattern instead? Half kidding, bu... (by jonnin)

by George P

help

Well, to begin with you could Please learn to use code tags, they make reading and commenting...

[3 replies] Last: Ah, another "I need better code" leech shows up. They get it and then... (by George P)

by frek

MinAveRange exercise

Hi all, It's about a task on Codility saying summarily: Find the range (with at least two elements...

[16 replies] Last: When working on a solution, a couple of times I was quite close to the... (by frek)

by Cplusc

adding header and cpp files from different folder in VS project (1,2)

I had a visual studio project which was working perfectly. As far as the project contained many head...

[20 replies] Last: Thank you all for your good points. (by Cplusc)

by Kingfrankbob

Help with Float point refrencing

https://youtu.be/KnCNfBb2ODQ Near the end of the video the guy mentions that to zoom infinitely y...

[9 replies] Last: yes. the most simple, basic thing would be to use base 10 (inefficient... (by jonnin)

by DeepMohinman

Does opencv have a constexpr vector or matrix container

I would like to do something like this for example: constexpr std::array<cv::Vec3b, 6> COLORS { ...

[3 replies] Last: const std::vector<cv::Vec<unsigned char, 3> > As current, std::vector... (by seeplus)

by copypasta

Wandbox (Online) - How To Save?

Been using Wandbox online browser IDE just to practice and learn. Was wondering how can I save my co...

[2 replies] Last: Using an online compiler is not the best way to learn C++ since many k... (by George P)

by SomeStudent

Struct as function parameter

I have been using the following way of passing a structure to a function #include <iostream> #incl...

[4 replies] Last: // For “in” parameters, pass cheaply-copied types by value and ot... (by JLBorges)

by see17

Suppress cout output from imported library

Hello, I am importing a library in my code which is verbose in its standard output. I don't want to...

[8 replies] Last: > Is there a way to suppress the stdout from the imported library only... (by JLBorges)

by Mitsuru

difference in VTK use between v8 and v9

Dear experts, I have used VTK as library using cmake build systems. As I used VTK.8, I found ...

[no replies]

by awsdert

Cusom printf implementation has slight issue

Since output is worth a thousand words in this case I'll just start with how I've called the top lev...

[1 reply] : Never mind, fixed it: PAW_API pawhhu* paw_putf_int_nxt( PAWBUF *UDV,... (by awsdert)

by frek

How to use modules in C++

Hi all, I'm going to use module s (instead of including headers) in C++ but don't know how it is p...

[15 replies] Last: M'ok, this is a major long shot, but something to check. Check your V... (by George P)

by George P

Comparing strings

You can't use C string functions on C++ strings. With C++ strings you compare two strings using the...

[13 replies] Last: I could say I am surprised or disappointed. Well, I could, but I shan... (by George P)

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