General C++ Programming - January 2022 (Page 4)

How to obtain the sys_days for "today" or "now"

Yes its a simple question: how can i get the std::chrono::sys_days corresponding for today or now?? Regards, Juan

[1 reply] : got it: using namespace std::chrono; const auto today = sys... (by JUANDENT)

Hello, I want to find a total of the fees but no matter how I try it always gives errors, can you help me. #include <iostream> using namespace std; float cal...

[3 replies] Last: This can be simplified - you don't need fees array. This also shows th... (by seeplus)

by JUANDENT

How to initialize a tuple with a variadic template parameter?

Hi, I have this class: template <typename Target, typename ...RefBy> struct TableDef { static Target target; static std::tuple<RefBy...> reference_list; }...

[4 replies] Last: Let me think and test some things and I will get at you with a more co... (by JUANDENT)

by Cplusc

writing the output in vtk format

I already installed the vtk library and run the vtk examples. before installation of vtk, I had the output in .txt as follow, std::ofstream file; file.open...

[16 replies] Last: Thanks for your help. I was reading about Ensight Gold format and I fo... (by Cplusc)

by frek

List five libraries that you would have liked to be part of the standard C++ library.

Hi all, The question is in the subject. Please list five libraries that you would have liked to be part of the standard C++ library, and tell me your reason(...

[8 replies] Last: What parts, especially, should be added ? much of boost funtamental... (by kbw)

by Cambalinho

how draw an image?

ok... these question isn't the first time and i have some problems: why the image isn't drawed? class image { public: BITMAP bitmap; HBITMAP...

[10 replies] Last: I messed about for ages to get this working. A pixel by pixel picture... (by oggin)

by PeteDD

... in function parameter list

Hi folks, Could someone please explain to me the use of "..." in this funtion's parameter list? I tried looking it up but found nothing. Thank you! void mu...

[2 replies] Last: Thank you keskiverto. This is brilliant! Very useful. (by PeteDD)

by George P

Single use C++ random engine

Normally if I wanted a single use random engine, say for use in std::shuffle on a container and no other use for the rng elsewhere in the code, I might do std:...

[8 replies] Last: There's also std::ranges::sample https://en.cppreference.com/w/cpp/alg... (by seeplus)

by mnm71

How to read i2c with interrupt signal?

I want to read the i2c information with interrupt, but this code I wrote does not work I can read the data directly after writing, But with a interrupt, the sig...

[no replies]

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