Do F5 (Build and Debug Active File) with no default compiler detected -- it could actually exist, but just not at a location we look at, so the user would need to manually add the paths, but it would be easier to do if the other stuff wasn't missing, e.g.

1. tasks.json doesn't get created.
2. launch.json is created but is missing the "program": "${fileDirname}\\${fileBasenameNoExtension}.exe" and preLaunchTask.