C++：傳遞指針類參數的構造函數

Question

class MySqlDbFactory: public DbDatabaseFactory{ 
     public: 
      IConnection* CreateConnection(){ 
      return new MySqlDbConnection(); 
      } 

      ICommand* CreateCommand(){ 
      return new MySqlDbCommand(); 
      } 
     }; 

class Factory{ 
      DbDatabaseFactory* _databaseFactory; 
      IConnection* _connection; 
      ICommand* _command; 
    public: 
      Factory(DbDatabaseFactory*); 

     void Start(){ 
      _connection->Connect(); 
      if(_connection->connectionState == true){ 
      _command->Execute("SELECT ..."); 
      } 
     }; 


    }; 

Factory::Factory(DbDatabaseFactory* dbFactory) 
    { 
     _databaseFactory = dbFactory; 
     _connection = dbFactory->CreateConnection(); 
    _command = dbFactory->CreateCommand(); 
    } 


int main(int argc, char *argv[]) 
{ 
    MySqlDbFactory* mySQlFactory = new MySqlDbFactory(); 
    Factory factory = new Factory(mySQlFactory); ... 

我從Factory*' to non-scalar type工廠」的錯誤

轉換要求 上

Factory factory = new Factory(mySQlFactory); line. 

你有什麼建議嗎？

Answer 1

它是：

Factory* factory = new Factory(mySQlFactory); 

（注意*後Factory）