给出下面程序的输出结果#include < iostream >using namespace std;class A{private: int X, Y;public : A ( int myx, int myy) { X = myx; Y = myy ;} void show ( ) { cout << "X =" << X << " Y = " << Y << endl;}}；class B : public A{ private : int H, W;public: B ( int myx, int myy, int myh, int myw) : A ( myx, myy) [ H = myh ; W = myw;}void show ( ) { cout << "H = " << H << " ; W = " << W << endl; }}；void main( ){ B d(1,2,3,4) ; d. show ( ) ;}