Error when using a member function in alglib::minlbfgsoptimi

franziss · **Joined:** Sat Jun 05, 2010 6:30 am **Posts:** 5

I have a class algo, which has a function algo::function1

when I run this

Code:

alglib::minlbfgsoptimize(state, &algo::function1);

It gives me the error

Code:

 error C2664: 'alglib::minlbfgsoptimize' : cannot convert parameter 2 from 'void (__thiscall algo::* )(const alglib::real_1d_array &,double &,alglib::real_1d_array &,void *)' to 'void (__cdecl *)(const alglib::real_1d_array &,double &,alglib::real_1d_array &,void *)'

May I know what went wrong?Thank you!

Sergey.Bochkanov · **Joined:** Fri May 07, 2010 7:06 am **Posts:** 927

That's because ALGLIB needs non-member function pointer, and you pass pointer to the member function. You have to write non-member proxy() function which calls member function of your choice, and pass this proxy function to the ALGLIB.

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