Compiling CUDA File in VS Code is not supported in the VS Code natively. This can be a issue if you want to compile and debug (atleast the CPU part of the file as kernel debugging is not currently supported in VS code at the moment. The procedure to do that is fairly simple. In your project, hit F5F5/F5 and you'll get the below pop-up. The default compiler chosen (if GCC) won't work as the default compiler won't understand CUDA extensions.