go install the following extensions on VSC:

1. C/C++ (comes with intellisense https://docs.microsoft.com/en-us/visualstudio/ide/visual-cpp-intellisense?view=vs-2019)
2. Clang-Format (formats c++ code on save)

Press command+shift+P, and navigate to preferences: open settings (JSON)
Make sure "editor.formatOnSave": true, exists in the json file.
Make sure the following bit of code exists in the json file as well:

"[cpp]": {
    "editor.defaultFormatter": "xaver.clang-format"
}