以下代码运行后的输出结果是（）
#include using namespace std;
class A
{
public:
void virtual print()
{
cout << "A" << endl;
}
};
class B : public A
{
public:
void virtual print()
{
cout << "B" << endl;
}
};
int main()
{
A* pA = new A();
pA->print();
B* pB = (B*)pA;
pB->print();
delete pA, pB;
pA = new B();
pA->print();
pB = (B*)pA;
pB->print();
}
using namespace std;
class A{
public:void virtual print(){
cout << "A" << endl;}
};
class B : public A{
public:void virtual print(){
cout << "B" << endl;}
};
int main(){
A* pA = new A();
pA->print();
B* pB = (B*)pA;
pB->print();
delete pA, pB;
pA = new B();
pA->print();
pB = (B*)pA;
pB->print();
} 
