#include 
        
         using namespace std;class MyClass{    public:        int x;        static int n;        const int y;        MyClass(int val)                : x(val), y(20)        {        }//        int get()//        {//            return x;//        }        //int get() const {return x;}        // const member function        //const int& get() {return x;}       // member function returning a const&        //const int& get() const {return x;} // const member function returning a const&        int get()        {            return x;        }        int gett() const        {            n++;            return y;        }        int getY()        {            cout<<"非成员函数常量getY"<