text: #include "../src/vec3.h"
  
  using namespace std;
  
  int main() {
    {
      auto v = Vec3();
      cout << v << endl;
      cout << endl;
    }
    {
      auto v = Vec3(1, 2, 3);
      cout << v << endl;
      cout << endl;
    }
    return 0;
  }
  