class Sensitivity {
 public:
  double getValue() const { return value_; }
  void setValue(double value) { value_ = value; }

 private:
  double value_ = 0.;
};

template <typename T>
struct Scale : public T {
  void scale(double multiplicator) {
    this->setValue(this->getValue() * multiplicator);
  }
};

template <typename T>
struct Square : public T {
  void square() { this->setValue(this->getValue() * this->getValue()); }
};

class SensitivityEnhanced : public Scale<Square<Sensitivity>>
{};

int main() {
  SensitivityEnhanced s;

  s.setValue(10.);

  s.scale(2.);

  return 0;
}