On 7 October 2014 12:47, Ivo Doko wrote: > On 2014-10-07 12:48, Jonathan Wakely wrote: > I fail to see where else I am supposed to define these variables for use > inside the class. Provide an out-of-class definition. Please read https://gcc.gnu.org/wiki/VerboseDiagnostics#missing_static_const_definition more carefully, all the way to the end of that section. Also try reading the http://www.stroustrup.com/bs_faq2.html#in-class page it links to.