下面程序输出的结果为 #include iostream.h” class A ｛ public: A()｛cout＜＜ CLASSA ＜＜endl;｝ ～A() ｛｝ ｝; class B:public A ｛ public: B()｛cout＜＜ CLASS B ＜＜endl;｝ ～B()｛｝ ｝; void main() ｛ A*p; p＝new B; B*q; q＝new B; ｝
A．CLASS A CLASS B CLASS B CLASS B
B．CLASS A CLASS B CLASS A CLASS B
C．CLASS A CLASS B CLASS B
D．CLASS A CLASS B