Let's start with a simple point class in 2D. It has x and y coordinates and a member function, which calculates the distance to another point:
class Point{public: Point(float x, float y) : x_{x}, y_{y} {} auto distance(const Point& p) const { auto dist_sqrd = std::pow(x_-p.x_, 2) + std::pow(y_-p.y_, 2) return std::sqrt(dist_sqrd); }private: float x_{}; float y_{};};
A simple usage example would be as follows:
auto target = Point{3, 5};
auto a = Point{6, 9};
auto b = Point{7, 4};
auto nearest_target = target.distance(a) < target.distance(b) ? a : b;
auto a_to_b_distance = a.distance(b); |
 Distances ... |
