Can't build c++ in Visual Studio Code - c++

Question

It seems like this, except that I followed it and I still unable to make it work in VS Code. This is the directory that I use:
C:\Users\EKI\Desktop\projects_cpp
As the instructions goes, I put the .json files in \project_cpp.vscode and the .cpp file in \projects_cpp\helloworld.
My .cpp file:
#include <iostream>
using namespace std;
int main()
{
cout << "Hello World";
}
The .json files are in the following:
launch.json
{
// Use IntelliSense to learn about possible attributes.
// Hover to view descriptions of existing attributes.
// For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
"version": "0.2.0",
"configurations": [
{
"name": "(gdb) Launch",
"type": "cppdbg",
"request": "launch",
"program": "${workspaceFolder}/helloworld.exe",
"args": [],
"stopAtEntry": true,
"cwd": "${workspaceFolder}",
"environment": [],
"externalConsole": true,
"MIMode": "gdb",
"miDebuggerPath": "C:\\mingw-w64\\x86_64-8.1.0-win32-seh-rt_v6-rev0\\mingw64\\bin\\gdb.exe",
"setupCommands": [
{
"description": "Enable pretty-printing for gdb",
"text": "-enable-pretty-printing",
"ignoreFailures": true
}
]
}
]
}
settings.json
{
"files.associations": {
"ostream": "cpp"
}
}
tasks.json
{
"version": "2.0.0",
"tasks": [
{
"label": "build hello world",
"type": "shell",
"command": "g++",
"args": [
"-g",
"${file}",
"-o",
"$${workspaceFolder}\\${fileBasenameNoExtension}",
],
"group": {
"kind": "build",
"isDefault": true
}
}
]
}
c_cpp_properties.json
{
"configurations": [
{
"name": "Win32",
"includePath": [
"${workspaceFolder}/**"
],
"defines": [
"_DEBUG",
"UNICODE",
"_UNICODE"
],
"compilerPath": "C:\\mingw-w64\\x86_64-8.1.0-posix-seh-rt_v6-rev0\\mingw64\\bin\\g++.exe",
"cStandard": "c11",
"cppStandard": "c++17",
"intelliSenseMode": "gcc-x64"
}
],
"version": 4
}
I tried turning off controlled folder access but still it doesn't work.
Here is the error message
Executing task: g++ -g c:\Users\EKI\Desktop\projects_cpp\helloworld\helloworld.cpp -o
$C:\Users\EKI\Desktop\projects_cpp\helloworld <
g++.exe: error: c:UsersEKIDesktopprojects_cpphelloworldhelloworld.cpp:
No such file or directory g++.exe: fatal error: no input files
compilation terminated. The terminal process terminated with exit
code: 1