void add_attack(void* state, void* element, int index) {
    double* a = (double*)state;
	Fighter* f = (Fighter*) element;
	Wizard* w = (Wizard*) element;
	if(f->class->defense(f) == 0.8)
	{
		 a += f->class->attack(f);
	}
	else
	{
		a += w->class->attack(w);
	}
}