WScript.exe is not a compiler but an interpreter because VBScript is not a compiled programming language but a script language.
This interpreter expects as the first parameter the path to script and will interpret it. You can add further parameters like this:
wcscript.exe test.vbs "C:\temp\"
But you can not omit the first one, it's a mandatory one!
BTW you can use Script.exe as well, it is the same like WScript.exe but a console program.