How to set C++ standard in gcc compiler on Ubuntu VS Code - visual-studio-code

Question

I'm running VS Code on freshly installed Ubuntu 22.04 LTS. Whatever I try, my language standard is stuck at c++17. I use gcc compiler.
To check the issue I run the following code:
#include <iostream>
int main()
{
if (__cplusplus == 201703L) std::cout << "C++17\n";
return 0;
}
Output is always the same: C++17
I've set "cppStandard": "c++23", in c_cpp_proporties.json.
I've set C++ standard in C/C++ Configurations settings to c++23.
I've set compiler arguments to -std=c++23.
I've been resetting VS Code, creating new files, reinstalling extensions, nothing.
Snippet from my tasks.json:
{
"tasks": [
{
"type": "cppbuild",
"label": "C/C++: g++ build active file",
"command": "/usr/bin/g++",
"args": [
"-fdiagnostics-color=always",
"-g",
"${file}",
"-o",
"${fileDirname}/${fileBasenameNoExtension}"
],
"options": {
"cwd": "${fileDirname}"
},
"problemMatcher": [
"$gcc"
],
"group": "build",
"detail": "Task generated by Debugger."
}
],
"version": "2.0.0"
}
Installed extensions:
C/C++ by Microsoft
C/C++ Extension Pack by Microsoft
C/C++ Themes by Microsoft
CMake Tools by Microsoft
Better C++ Syntax by Jeff Hykin

Answer 1

As many of the commentators pointed out, tasks.json is used for compiling. #Some programmer dude correctly explained that I should put argument inside it. Updating task.json with the following code is the solution:
{
"tasks": [
{
"type": "cppbuild",
"label": "C/C++: g++ build active file",
"command": "/usr/bin/g++",
"args": [
"-std=c++23",
"-fdiagnostics-color=always",
"-g",
"${file}",
"-o",
"${fileDirname}/${fileBasenameNoExtension}"
],
"options": {
"cwd": "${fileDirname}"
},
"problemMatcher": [
"$gcc"
],
"group": {
"kind": "build",
"isDefault": true
},
"detail": "Task generated by Debugger."
}
],
"version": "2.0.0"
}