For testing purposes, the haxelib hxcpp installation includes a Cppia host program wich can be used to test simple scripts.
Navigate to the /bin folder, and run the following command:
> haxelib run hxcpp script.cppia
This should output the following in the console:
> Script.hx:4: Hello from Cppia SCRIPT
Now, we know that our script works and can be executed by an cppia host.