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Message: [QUOTE="Andreas Sch., post: 1478056"] Hello, I had been quite suprised by the following little program: ---- cut ---- #include "iostream.h" class base { public: base(){} virtual ~base(){}; void printType(base * obj); }; class derived : public base { public: virtual void doIt() { printType(this); } }; void base::printType(base * obj) { cout << "type is " << typeid(obj).name() << endl; cout << dynamic_cast<derived *>(obj) << endl; } int main(int argc, char * argv[]) { derived myObj; myObj.doIt(); } ---- cut ---- It prints: type is P4base 0xbfffec00 My expectation was to see "derived" for the type name. And even if it is identified as "base" the RTTI should not be able to dynamic-cast it to a derived object which it is reported not to be. Tested with gcc 3.3 and 3.3.2. Somebody able to enlighten me? Greetings, Andreas [/QUOTE]