摘要：
usingSystem;namespaceVisitor{publicabstractclassAnimal{publicvoidRun(){Console.WriteLine("I'mrunning!");}publicabstractvoidAccept(AnimalVisitorvisitor);}publicclassDog:Animal{publicoverridevoidAccept(... 阅读全文
posted @ 2007-05-20 12:54
hzwang
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