Description: The beginners always understand the concept of polymorphism clear, through several examples in understanding polymorphic. The polymorphism described is to use a base class pointer or reference to the ability to operate more than one type of. We know that subclass pointer can be implicitly transformed the parent class, so during our programming if you want an unknown type processing method declaration type of the parameter declared as the parent class pointer . This is to achieve a to perform different method according to the incoming type. The key here is to subclass override the parent class' s virtual method in the corresponding position of the virtual method table cover virtual methods of the parent class.
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