View Compilation Error

0_0_17429001_4322.cpp: In function 'double dis(Point, Point)':
0_0_17429001_4322.cpp:34:35: error: 'hypot' was not declared in this scope
  return hypot(a.x - b.x, a.y - b.y);
                                   ^
0_0_17429001_4322.cpp: In function 'int main()':
0_0_17429001_4322.cpp:65:37: error: 'scanf_s' was not declared in this scope
   scanf_s("%lf%lf", &a[i].x, &a[i].y);
                                     ^