C# 圆柱体类：计算体积和表面积

下面是 C# 代码：

using System;

class Cylinder
{
    double radius;
    double height;

    public Cylinder(double r, double h)
    {
        radius = r;
        height = h;
    }

    public double Volume()
    {
        return Math.PI * radius * radius * height;
    }

    public double Area()
    {
        return 2 * Math.PI * radius * height + 2 * Math.PI * radius * radius;
    }
}

class Test
{
    static void Main(string[] args)
    {
        Cylinder c = new Cylinder(5.0, 10.0);
        Console.WriteLine('Volume: ' + c.Volume());
        Console.WriteLine('Area: ' + c.Area());
    }
}