text: //
  // Created by lucien on 1/29/19.
  //
  
  #include "geometry2.h"
  #include <cstdio>
  
  int main() {
      using vector = geometry2::Vector;
      vector vec(1, 2);
      printf("%lf %lf\n", vec.x, vec.y);
      vector unit = vec.unit();
      printf("%lf %lf\n", unit.x, unit.y);
      return 0;
  }
  