关于类型识别的一些问题?

lh1611 2002-05-18 11:07:15
我是一位刚刚学习VC编程的新手,在看书只遇到了一切问题.
为什么VC要用到运行时类型识,类型识别有什么用啊?运行时类型识别是VC特有的还是windows已经存在的呢?其它的开发工具是否也用到类型识别的方法。希望各位大虾告之。
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rkt_dijkstra 2002-05-18
CRuntimeClass is a structure and therefore does not have a base class.

CRuntimeClass is a structure you can use to obtain information about an object or its base class at run time. The ability to determine the class of an object at run time is useful when extra type checking of function arguments is needed, or when you must write special-purpose code based on the class of an object.

Each class derived from CObject is associated with a CRuntimeClass structure that you can use to obtain information about an object or its base class at run time. Run-time class information is not supported directly by the C++ language.

CRuntimeClass provides information on the related C++ object, such as a pointer to the CRuntimeClass of the base class and the ASCII class name of the related class. This structure also implements various functions that can be used to dynamically create objects, specifying the type of object by using a familiar name, and determining if the related class is derived from a specific class.

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