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C++: What is the difference between dynamic and static casting?

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C++: What is the difference between dynamic and static casting?
posted Dec 18, 2014 by Amit Kumar Pandey

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Use dynamic_cast when casting from a base class type to a derived class type. It checks that the object being cast is actually of the derived class type and returns a null pointer if the object is not of the desired type (unless you're casting to a reference type -- then it throws a bad_cast exception).

Use static_cast if this extra check is not necessary. since dynamic_cast performs the extra check, it requires RTTI information and thus has a greater runtime overhead, whereas static_cast is performed at compile-time.

answer Dec 18, 2014 by Mohammed Hussain
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