static void Main(string[] args) { Point n = new Point(2, 4); Circle m = new Circle(5, 2, 4); m.Show(); }
static void Main(string[] args) { Console.Write("请输入长方形的长:"); double length = double.Parse(Console.ReadLine()); Square square = new Square(length); square.Show(square.Area()); Console.Write("请输入圆的半径:"); double radius = double.Parse(Console.ReadLine()); Circle circle = new Circle(radius); circle.Show(circle.Area()); }