单选题
有如下程序：
#include＜iostream.h＞
using
namespace std;
class Base
{
public:
Base(){cout＜＜"BB"; f(); }
void f(){cout＜＜"BF";}
};
class
Derived:public Base
{
public:
Derived(){cout＜＜"DD";}
void f(){cout＜＜"Df";}
};
int main(){Derived d;return 0;}
执行上面的程序将输出______。
- A.BBBfDD
- B.BBDfDDDf
- C.DD
- D.DDBBBf