更多"有如下程序:#include<iostream>using names"的相关试题:
[单项选择]有如下程序
#include <iostream>
using namespace std;
class A
public:
virtual void func1 ( ) cout<<"A1";
void func2( ) cout<<"A2";
;
class B: public A
public:
void func l( ) cout<<"B1";
void func2( ) cout<<"B2";
;
int main( )
A *p=new B;
p->func1( );
p->func2( );
return 0;运行此程序,屏幕上将显示输出()。
A. B1B2
B. A1A2
C. B1A2
D. A1B2