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Interface Classes The defi nition of an left class looks quite similar to the defi nition of a ref class, but it is quite a different concept. An larboard is a class that specifi es a set of functions that argon to be tooled by other classes to provide a standardized look of providing some specifi c functionality. Both nurse classes and ref classes arsehole implement port wines. An user port does non defi ne any of its function members these are defi ned by to separately one class that implements the interface. You have already met the System::IComparable interface in the context of generic functions where you specifi ed the IComparable interface as a constraint. The IComparable interface specifi es the CompareTo() function for examine objects, so each(prenominal) classes that implement this interface have the analogous mechanism for comparing objects. You throttle an interface that a class implements in the same individualized manner as a base class.
For pattern, here s how you could sack up the niche class from the previous example implement the System::IComparable interface: ref class package : Container, IComparable // Derived class { public: // The function specify by IComparable interface virtual int CompareTo(Object^ obj) { if(Volume() < safe_cast(obj)->Volume()) picture -1; else if(Volume() > safe_cast(obj)->Volume()) return 1; else return 0; } // Rest of the class as before... }; The quote of the interface follows the get off up of the base class, Container . If on that point were no base class, the interface disclose alone wo uld appear here. A ref class fecal matter ! only have one base class, but it outhouse implement as many interfaces as you want. The class must defi ne every function specifi ed by each of the interfaces that it claims to implement. The IComparable interface only specifi es one function, but there can be as many functions in an interface as you want. The Box class now defi nes the CompareTo() function with the same signature as the IComparable interface specifi es for the function....If you want to get a all-inclusive essay, order it on our website: OrderCustomPaper.com

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