C# 與物件導向中的多型技術 (Polymorphism) - 免費電子書：C# 程式設計

using System; class ShapeTest { public static void Main(string[] args) { Rectangle r = new Rectangle(5.0, 8.0); Console.WriteLine("r.area() = " + r.area()); Circle c = new Circle(3.0); Console.WriteLine("c.area() = " + c.area()); Shape ...

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