how to avoid static member function when using gsl with c++

Question

I would like to use GSL within a c++ class without declaring member functions as static. The reason for this is because I don\'t know them too well and I\'m not

Answer 1

GSL takes a C-type functions “int (*)(char,float)” rather than C++-type “int (Fred::*)(char,float)”. To convert a member function to the C-type function, you need to add static.

see Is the type of “pointer-to-member-function” different from “pointer-to-function”?