更多"有如下程序: #include <iostream> using "的相关试题:
[单项选择]有如下程序
#include <iostream>
using namespace std;
class A
public:
virtual void funcl( ) cout<<"A1";
void func2( ) cout<<"A2";
;
class B:public A
public:
void funcl( ) cout<<"B1";
void func20 cout<<"B2";
;
int main( )
A. )。B1B2
B. A1A2
C. B1A2
D. A1B2