### Exercise

#### 3D point

### Objetive

#### Create a class "Point3D", to represent a point in 3-D space, with coordinates X, Y and Z. It must contain the following methods:

MoveTo, which will change the coordinates in which the point is.

DistanceTo(Point3D p2), to calculate the distance to another point.

ToString, which will return a string similar to "(2,-7,0)"

And, of course, getters and setters.

The test program must create an array of 5 points, get data for them, and calculate (and display) the distance from the first point to the remaining four ones.

### Code

```
Imports System
Class Point3D
Protected x, y, z As Double
Public Sub New()
End Sub
Public Sub New(ByVal nx As Double, ByVal ny As Double, ByVal nz As Double)
MoveTo(nx, ny, nz)
End Sub
Public Function GetX() As Double
Return x
End Function
Public Sub SetX(ByVal value As Double)
x = value
End Sub
Public Function GetY() As Double
Return y
End Function
Public Sub SetY(ByVal value As Double)
y = value
End Sub
Public Function GetZ() As Double
Return z
End Function
Public Sub SetZ(ByVal value As Double)
z = value
End Sub
Public Sub MoveTo(ByVal nx As Double, ByVal ny As Double, ByVal nz As Double)
x = nx
y = ny
z = nz
End Sub
Public Function DistanceTo(ByVal p2 As Point3D) As Double
Return Math.Sqrt((x - p2.GetX()) * (x - p2.GetX()) + (y - p2.GetY()) * (y - p2.GetY()) + (z - p2.GetZ()) * (z - p2.GetZ()))
End Function
End Class
```