A better implementation of a 1D point

pointgood.cpp

class PointGood {
  private:
    int x_;
  public:
    PointGood(int x) : x_(x) {}

    int GetX() const {
        return this->x_;
    }
};

void g() {
    PointGood const p(5);
    std::cout << p.GetX(); // works
}