Update esolver_ks_lcao_tddft.h

Author: mohanchen

source/module_esolver/esolver_ks_lcao_tddft.h

@@ -18,15 +18,19 @@ class ESolver_KS_LCAO_TDDFT : public ESolver_KS_LCAO<std::complex<double>, doubl
 
     void before_all_runners(const Input_para& inp, UnitCell& cell) override;
 
+    //! Psi of last time step
     psi::Psi<std::complex<double>>* psi_laststep = nullptr;
 
+    //! Hamiltonian of last time step
     std::complex<double>** Hk_laststep = nullptr;
 
+    //! Overlap matrix of last time step
     std::complex<double>** Sk_laststep = nullptr;
 
-    // same as pelec
+    //! Electronic states of rt-TDDFT
     elecstate::ElecStateLCAO_TDDFT* pelec_td = nullptr;
 
+    //! ?
     int td_htype = 1;
 
   protected: