以下程序的执行结果是________。
#include<iostream.h>
class base

public:
virtual void who( ) cout<<"base class"<<end1;
;
class derrvel: public base

public:
void who( ) cout<<"derivel class"<<end1;

class derive2:public base

public:
void who( )cout<<"derive2class"<<end1;

void main( )

base obj1,*P;
derivel obj2;
derive2 obj3;
p=&obj1:
p->who( );
p=&obj2;
p->who( );
p=&obj3;
p-->who( ):

题库:计算机等级考试 类型:填空题 时间:2017-07-03 15:23:19 免费下载:《填空》Word试卷

以下程序的执行结果是________。
#include<iostream.h>
class base

public:
virtual void who( ) cout<<"base class"<<end1;
;
class derrvel: public base

public:
void who( ) cout<<"derivel class"<<end1;

class derive2:public base

public:
void who( )cout<<"derive2class"<<end1;

void main( )

base obj1,*P;
derivel obj2;
derive2 obj3;
p=&obj1:
p->who( );
p=&obj2;
p->who( );
p=&obj3;
p-->who( ):

以下程序的执行结果是________。  #include<iostream.h>  class base    public:  virtual void w

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