#include <typeinfo>
    #include <iostream>
    using namespace std;
    class AngleShape
    {
        public:
        virtual void myvirtualfunc() const {}
    };
    class Triangle: public AngleShape
    {
        public:
        virtual void myvirtualfunc() const
        {   
        };
    };
    int main()
    {
        AngleShape Angleshape_instance;
        AngleShape &ref_Angleshape = Angleshape_instance;
        try 
        {
            Triangle &ref_Triangle = dynamic_cast <Triangle& > (ref_Angleshape);
        }
        catch (bad_cast)
        {
            cout << "Can't do the Dynamic_cast" << endl;
            cout << "Caught: bad_cast exception. AngleShape is not Triangle.\n";
        }
        return 0;
    }