public double getLenght(Point x, Point y)
{
double lenght;
double x_result;
double y_result;
x_result = (y.x - x.x) * (y.x - x.x);
y_result = (y.y - x.y) * (y.y - x.y);
lenght = Sqrt.getSqrt(x_result + y_result);
return(lenght);
}