#pragma once

struct Vec2d
{
  double x;
  double y;

  Vec2d & operator+=(const Vec2d& rhs) {
    x+=rhs.x;
    y+=rhs.y;
    return *this;
  }
  Vec2d & operator-=(const Vec2d& rhs) {
    x-=rhs.x;
    y-=rhs.y;
    return *this;
  }
  Vec2d & operator*=(const double& rhs) {
    x*=rhs;
    y*=rhs;
    return *this;
  }
  Vec2d & operator/=(const double& rhs) {
    x/=rhs;
    y/=rhs;
    return *this;
  }
  const Vec2d operator+(const Vec2d& rhs) const {
    Vec2d result = *this;
    result += rhs;
    return result;
  }
  const Vec2d operator-(const Vec2d& rhs) const {
    Vec2d result = *this;
    result -= rhs;
    return result;
  }
  const double operator*(const Vec2d& rhs) const {
    return (this->x * rhs.x) + (this->y * rhs.y);
  }
  const Vec2d operator*(const double& rhs) const {
    Vec2d result = *this;
    result *= rhs;
    return result;
  }
  const Vec2d operator/(const double& rhs) const {
    Vec2d result = *this;
    result /= rhs;
    return result;
  }
};