填空题
下列程序的输出结果为2，请将程序补充完整。
#include ＜iostream＞
using namespace std;
class Base
{
public:
______void fun() {cout＜＜1;}
};
class Derived:public Base
{
public:
void fun(){cout＜＜2;}
};
int main()
{
Base*p=new Derived;
p-＞fun();
delete p;
return 0;
}
【参考答案】
virtual