Following function template is defined in Foo.h. #include <array> using namespace std; template<unsigned N> array<int, N> gen_arr() { array
I have a class array inside which I have declared an array its size and length. I am trying to merge two sorted arrays by creating the third array on the heap a
Searched for about 1 hour and still unable to find any relevant search results. I want to wait on multiple pipes in a single thread, but unable to convert the f
This is a generic question about templating, I am using advance as an example. Assume there are reasons I can't use ADL or hidden friends here. The definition o
#include <iostream> #include <map> using namespace std; int main() { map<int, int> ma; // 원소를 추,
I am trying to understand std::find(). Below is my code. std::set::find searches the container for an element equivalent to val and returns an iterator to it i
I have 2 classes: A and B. I need to pass instances of them to a function that will push them into a vector. I want to have good efficiency in my program, so I
Coming from a good foundation in java to c++, I'm really confused on why when we use the cmath library we don't have to call it like: classname.function like we
What are undefined reference/unresolved external symbol errors? What are common causes and how to fix/prevent them?
I'm trying to make similar to std::round() function using SSE(1,2,3) instructions but have some issues with certain values and/or logical operators. Here's my c
In a project I read, there are two header files and two declarations for the same class. One is used by programs that use this library, serving as an interface.
I've followed the instructions here to setup VSCode with C++ on Windows 10 with MingGW https://code.visualstudio.com/docs/languages/cpp and I've followed the in
With C++20, we've gained templated lambdas, great! []<class T>(){}; Is it possible to call a lambda callback with a template parameter,
I've found on this forum the following snippet witten by user Ben Voigt: //forward declaration template<typename T> T getline_as(std::istream& s); te
Still new to c++ so I apologize if this is really obvious or something. Currently I have a small program (~250 lines) throwing a segmentation fault. There's a s
I'm implementing a fake 3D rendering using raycasting method (such as Wolfenstein3D). I have following the permandi's tutorial (https://permadi.com/1996/05/ray-
I'm currently learning C++, and at the moment I'm starting off by making multiple kinds of calculators to test my problem solving capabilities
I have the below C++ code which issues a compilation warning as shown below. Case 1: char temp_buffer[80]; double **data; .... sprintf(temp_buffer, "%.*g", size
I am trying to write a very simple game using C++ and SDL2. I have a gameObject class and a player object. I am trying to change the update function for the pla
In order to use auto-vectorization for a c++ code which will be running on x86-64 and aarch64 processors, is just adding #pragma omp simd in t