C++ examples for Class:Polymorphism
Dynamic cast used to test type of object
//RTTI must be enabled in compiler #include <iostream> #include <typeinfo> //for dynamic_cast using namespace std; class Base/*from ww w. j av a 2 s .com*/ { virtual void vertFunc() //needed for dynamic cast { } }; class Derv1 : public Base { }; class Derv2 : public Base { }; //checks if pUnknown points to a Derv1 bool isDerv1(Base* pUnknown) //unknown subclass of Base { Derv1* pDerv1; if( pDerv1 = dynamic_cast<Derv1*>(pUnknown) ) return true; else return false; } int main() { Derv1* d1 = new Derv1; Derv2* d2 = new Derv2; if( isDerv1(d1) ) cout << "d1 is a member of the Derv1 class\n"; else cout << "d1 is not a member of the Derv1 class\n"; if( isDerv1(d2) ) cout << "d2 is a member of the Derv1 class\n"; else cout << "d2 is not a member of the Derv1 class\n"; return 0; }