有下列程序: #include<iostream> using namesp
题型:填空题
问题:
有下列程序:
#include<iostream>
using namespace std;
class ONE
public:
virtual void f()COUt<<"1";
;
c1assTWO:public ONE
public:
TWO()cout<<"2";
;
class THREE:public TWO
public:
virtual void f()TWO∷f();cout<<"3";
;
int main()
ONE aa,*p;
TWO bb;
THREE cc;
p=&cc;
p->f();
return 0;
执行上面程序的输出结果是______。