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Is it guaranteed to safe passing [c  ] POD types to [c] or vise versa? [closed]
Class Point {
        long x,y;
        Point(long x, long y) {
                this->x=x;
                this->y=y;
        }

        float Distance(Point &point) {
                return ....;
        }
};

struct point {
        long x,y;
};

struct point
{
    long x, y;
};

class Point : public struct point
{
  public:
    Point(long x, long y)
        {    this->x=x; this->y=y; }

    float Distance(Point &point)
        {                return ....;        }
}