# 3D point - Practice Exercises C# Sharp

## Lesson 7:

## More on classes

## Exercise 7.12:

## 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.

## Source Code:

```
using System;
class Point3D
{
protected double x, y, z;
public Point3D()
{
}
public Point3D(double nx, double ny, double nz)
{
MoveTo(nx, ny, nz);
}
public double GetX()
{
return x;
}
public void SetX(double value)
{
x = value;
}
public double GetY()
{
return y;
}
public void SetY(double value)
{
y = value;
}
public double GetZ()
{
return z;
}
public void SetZ(double value)
{
z = value;
}
public void MoveTo(double nx, double ny, double nz)
{
x = nx;
y = ny;
z = nz;
}
public double DistanceTo(Point3D p2)
{
return Math.Sqrt((x - p2.GetX()) * (x - p2.GetX()) +
(y - p2.GetY()) * (y - p2.GetY()) +
(z - p2.GetZ()) * (z - p2.GetZ()));
}
}
```

Exercisey 7.12