- public class Plane {
- public virtual double TopSpeed() { return 300.0D;}
- public static bool operator>(Plane one, Plane two) {
- return one.TopSpeed() > two.TopSpeed();
- }
- public static bool operator<(Plane one, Plane two) {
- return one.TopSpeed() < two.TopSpeed();
- }
- }
- class Jet : Plane {
- public override double TopSpeed() { return 900.0D; }
- public override string ToString() { return "I'm a Jet"; }
- }
- class Airport {
- [STAThread]
- static void Main(string[] args) {
- Plane plane = new Jet();
- Console.WriteLine("plane's top speed: {0}",plane.TopSpeed());
- Jet jet = new Jet();
- Console.WriteLine("jet's top speed: {0}",jet.TopSpeed());
- Console.WriteLine("Plane > Jet = {0}", plane > jet);
- Console.ReadLine();
- }
- }
- //该片段来自于http://www.codesnippet.cn/detail/090620133974.html
来源: http://www.codesnippet.cn/detail/090620133974.html