text: class disease : public patient {
    std::string diseaseName;
    std::string doctor;
    public:
      disease(std::string dis="common cold", std::string doc="general"){
        diseaseName = dis;
        doctor      = doc;
      }
      void getInfo();
  };
  
  void disease::getInfo() {
    patient::getInfo();
    std::cout << diseaseName << std::endl;
    std::cout << doctor << std::endl;
  }
  
  