class Newt : public Frog { 
        public:
                Newt( char *n) : (n) {}

                void jump( int x)
                {
                        printf( "I'm a jumping Newt\n" );
                        // invoke base class function against 
                        // this derived class object
                        Frog::jump( x);
                }
        };

        class Toad : public Frog { 
        public:
                Toad( char *n) : (n) {}

                void jump( int x)
                {
                        printf( "I'm a jumping Toad\n" );
                        Frog::jump( x);
                }
        };

        class Salamander : public Frog { 
        public:
                Salamander( char *n) : (n) {}

                void jump( int x)
                {
                        printf( "I'm a jumping Salamander\n" );
                        Frog::jump( x);
                }
        };