Parameters_Simulation and Parameters_Lattice could be reorganized a separate Parameters classes nested within the Simulation and Lattice classes respectively. Also, since the Simulation class contains a Lattice member variable, Simulation::Parameters could inherit from Lattice::Parameters to create a single derived class with all of the required parameters.
Parameters_Simulation and Parameters_Lattice could be reorganized a separate Parameters classes nested within the Simulation and Lattice classes respectively. Also, since the Simulation class contains a Lattice member variable, Simulation::Parameters could inherit from Lattice::Parameters to create a single derived class with all of the required parameters.