再次修复了代码

提高了代码的可读性

src/PosPair.cpp

@@ -10,7 +10,7 @@ PosPair::PosPair()
     pos_y = stop_begin_y;
 }
 
-int PosPair::GetStopSpaceLength(int stop_number) const
+int PosPair::GetStopSpaceLength(int stop_number)
 {
     return 2 * (stop_rail_width + stop_rail_height) / stop_number;
 }

src/StrategyFactory.cpp

@@ -131,15 +131,13 @@ BusStrategyBase *StrategyFactory::GetStrategy(const QString& file_name)
             break;
         case BUS_SCAN:
             controller = new BusSCANStrategy;
+            break;
         default:
             controller = nullptr;
             break;
     }
 
-    if(controller != nullptr)
-    {
-        controller->rails_model->CreateRails(distance, total_station);
-        controller->strategy = chosen_strategy;
-    }
+    controller->rails_model->CreateRails(distance, total_station);
+    controller->strategy = chosen_strategy;
     return controller;
 }

src/busModel.cpp

@@ -13,9 +13,7 @@ BusModel::BusModel()
 }
 
 BusModel::~BusModel()
-{
-
-}
+= default;
 
 void BusModel::ResetBus(rail_node_t *head)
 {