C# 虚函数使用范例

C# 虚函数使用范例

using System;
namespace Test2 {
   class Plane {
      public double TopSpeed() {
         return 300.0D;
      }
   }
   class Jet : Plane {
      public double TopSpeed() {
         return 900.0D;
      }
   }
   class Airport {
      static void Main(string[] args) {
         Plane plane = new Jet();
         Console.WriteLine("planes top speed: {0}",plane.TopSpeed());
         Console.ReadLine();
      }
   }
}