#include<iostream.h>class Baspublic: ~Bas
题型:填空题
问题:
#include<iostream.h>
class Bas
public:
~Bas()cout<<"Bas construct"<<endl;
virtual void f()=0;
;
class Dev:public Bas
public:
~Dev()cout<<"Bas construct"<<endl;
virtual void f()cout<<"Dev::f"<<endl;
;
void main()
Bas*a=new Bas();
Dev p;
a=&p;
a->f();