Category "c++"

Can I launch a cooperative kernel without passing an array of pointers?

The CUDA runtime API allows us to launch kernels using the variable-number-of-arguments triple-chevron syntax: my_kernel<<<grid_dims, block_dims, shar

Libwesockets.h: Issue with lws_write: C++ string to C conversion and send

I'm using g++. Code: std::string str = "{\"action\":3,\"data\":{\"account\":\"somehashgoeshear\",\"someint\":0,\"id\":1,\"moreint\":0,\"name\":\"demo\

Measuring bandwidth on a ccNUMA system

I'm attempting to benchmark the memory bandwidth on a ccNUMA system with 2x Intel(R) Xeon(R) Platinum 8168: 24 cores @ 2.70 GHz, L1 cache 32 kB, L2 cache 1 MB a

cannot convert int (*(int))(int) to int (*(int))(int)

i'm trying to learn about function that returning a pointer to a function, after i tried to compile the code, it gives me this kind of error: cannot convert

Unable to use std::apply on user-defined types

While implementing a compressed_tuple class for some project I'm working on, I ran into the following issue: I can't seem to pass instances of this type to std:

OpenMP-behavior: Using ICC and GCC gives significantly different run times

For a small benchmark of OpenMP on an i7-6700K I wrote the following code: #include <iostream> #include <omp.h> #include <vector> #include <

uint16_t array to string and back c++

I have a uint16_t array and I want to be able to convert it to a string and convert it back. The goal is to save the array with this library and load it back in

Why Input/Output Error occurs when use ls command in my fuse filesystem?

Why I/O Error causes when I tried ls . command in my fuse filesystem? My filesystem has a limitation that it only allows mail address type as individual filenam

Why do std::stof, std::stod, and std::stold handle errors with exceptions?

What is the rationale for why std::stof, std::stod, and std::stold throw exceptions? http://en.cppreference.com/w/cpp/string/basic_string/stof Input errors are

How to generate .pdb file in Visual Studio 2019 for C++ from command line

I am using cl.exe C++ compiler in Visual Studio 2019 from the command line. But, I am unable to set the required flag to produce a .pdb file to debug in a separ

GL Error 1280 when enabling depth test

I'm having some problems with an opengl application I'm writing. GLenum err = 0; glEnable( GL_DEPTH_TEST ); err = glGetError(); if ( err != GL_NO_ERROR ) p

clang: What does emitting mean?

The clang diagnostics reference uses the word emit three times. The following warnings use this term. Example 1: Compile this with -Wunneeded-internal-declarati

Valgrind shows question marks

I have compiled a program using Code::Blocks. I have turned on "produce debugging symbols" under the "Debug" target, and also turned off "strip all symbols..."

Warning: function 'F' is not needed and will not be emitted

Here is a little program (live on godbolt): static void UnusedDeclaration(); static void UnusedDefinition() {} static void Declaration(); decltype(Declaration(

print fibo big numbers in c++ or c language

I write this code for show fibonacci series using recursion.But It not show correctly for n>43 (ex: for n=100 show:-980107325). #include<stdio.h> #in

Can i track my mouse pos outside a SDL window?

I build a clock with SDL, its a window without border. Now i still wanna be able to move my clock around my screen so i wrote a function to move it. Basicly it

Fail to insert the element of the set to the vector in c++

Given a set of integers: set<int> setA = {1,2,3,4,5}; Now I want to insert the integer to a vector of integers under a certain condition: vector<int&g

Operator Overloading Test Failure

Build is successful, but the test case #2 keep failing. I don't know what to change or fix. The test program says that Test Case #2 operator <=() FAILED and

overload array operator for mystring class

I need help figuring out how to overload the array operator for a MyString class that I have to create. I already have everything else figured out, but the arra

Microsoft bond c++ runtime deserialization using runtime schema

I could not find anything useful in their docs or examples :( They have docs of how to deserialize schema, and then how to traverse it - that works great. They