有如下程序:#include <iostream>using namespace std;class AA{public: virtual void f() {cout<
有如下程序: #include <iostream> using namespace std; class AA { public: virtual void f() { cout<< "AA"; } }; class BB : public AA { public: BB() { cout << "BB"; } }; cla
A.AA
B.AABBCC
C.BBAABBCC
D.BBBBAACC