class A{ void P1（){cout$amp;<amp;<quot;$A111"}; void P2（){cout$amp;<amp;<quot;$A222"}; }; class B:pub-学而优知识库

class A{ void P1（){cout$amp;<amp;<quot;$A111"}; void P2（){cout$amp;<amp;<quot;$A222"}; }; class B:pub

class A{
void P1(){cout$amp; void P2(){cout$amp;};
class B:public A{
void P1(){cout$amp; virtual void P2(){cout$amp;}
..........
A*cl=NULL;
cl=new A;
A->P1();
A->P2();
delete cl;
cl=NULL;
cl=new B;
A->P1();
A->P2();
delete cl;
cl=NULL;
..........
写出运行结果;

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