/*
C# Programming Tips & Techniques
by Charles Wright, Kris Jamsa
Publisher: Osborne/McGraw-Hill (December 28, 2001)
ISBN: 0072193794
*/
// IntrFace.cs -- demonstrates the use of a simple interface
//
// Compile this program with the following command line:
// C:>csc IntrFace.cs
using System;
namespace nsInterface
{
interface IPlane
{
double Area
{
get;
}
}
interface ISolid
{
double Volume
{
get;
}
}
class clsCircle : IPlane
{
public clsCircle (double radius)
{
m_Radius = radius;
}
public double Area
{
get {return (3.14159 * m_Radius * m_Radius);}
}
private double m_Radius;
public override string ToString ()
{
return ("Area = " + Area);
}
}
class clsSphere : IPlane, ISolid
{
public clsSphere (double radius)
{
m_Radius = radius;
}
public double Area
{
get {return (4 * 3.14159 * m_Radius * m_Radius);}
}
public double Volume
{
get {return (4 * 3.14159 * m_Radius * m_Radius * m_Radius / 3);}
}
private double m_Radius;
public override string ToString ()
{
return ("Area = " + Area + ", " + "Volume = " + Volume);
}
}
public class IntrFace
{
static public void Main ()
{
clsCircle circle = new clsCircle (14.2);
clsSphere sphere = new clsSphere (16.8);
Console.WriteLine ("For the circle: " + circle);
Console.WriteLine ("For the sphere: " + sphere);
}
}
}
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