Use portable logical operators

src/DRUDE/fix_tgnh_drude.cpp

@@ -761,7 +761,7 @@ void FixTGNHDrude::setup_mol_mass_dof() {
               dof_mol, dof_int, dof_drude);
     }
   }
-  if (dof_mol <=0 or dof_int <=0 or dof_drude <=0)
+  if (dof_mol <=0 || dof_int <=0 || dof_drude <=0)
     error->all(FLERR, "TGNHC thermostat requires DOFs of molecules, atoms and dipoles larger than 0");
 }
 

src/ORIENT/fix_orient_eco.cpp

@@ -550,7 +550,7 @@ int FixOrientECO::get_norm() {
         squared_distance = delta[0] * delta[0] + delta[1] * delta[1] + delta[2] * delta[2];
 
         // check if atom is within cutoff region
-        if ((squared_distance != 0.0) and (squared_distance < squared_cutoff)) {
+        if ((squared_distance != 0.0) && (squared_distance < squared_cutoff)) {
           ++neigh;
           squared_distance *= inv_squared_cutoff;
 

src/PHONON/third_order.cpp

@@ -203,7 +203,7 @@ void ThirdOrder::options(int narg, char **arg)
       iarg += 2;
     } else error->all(FLERR,"Illegal third_order command");
   }
-  if (file_flag == 1 and me == 0) {
+  if (file_flag == 1 && me == 0) {
     openfile(filename);
   }
 }