c++ stl --dynamic_cast

#include <iostream>#include <string>using namespace std;class Car{virtual  void f();};class myCar : public Car{virtual  void f(){cout << "this is my car" << endl;}};void f(Car* car){myCar* my = dynamic_cast<myCar*> (car);}int main(){cout << "test dynamic_cast ----" << endl;return 0;}