8.5.2.cs

深入浅出C＃,学习C#比较好的用例,能够很快掌握C#.

using System;
class Square
{
	double length,area;
	public Square(double x)
	{
		length=x;
	}
	public virtual double Area()
	{
		area=length*length;
		return area;
	}
}
class Cube:Square
{
	public Cube(double l):base(l)
	{
	}
	public override double Area()
	{
		return base.Area()*6;
	}
}
class Mainclass
{
	public static void Main()
	{
		Square square=new Cube(5);
		Console.WriteLine("The area of the cube with the line of 5 is:{0}",square.Area());
	}
}