单选题 关于下面代码,说法正确的是: class Bike { public: void move( ); //略 }; class Player : private Bike{ // (1) public: //略 private: //略 }; int main( ) { Player player; player.move( ); // (2) Bike * pb = (Bike *)(&player); // (3) pb->move( ); // (4) Bike & b = (Bike ) (player); // (5) }