写出下列程序代码运行的结果【】。 include<iostream.h> class A{public:virtual void disp() {cout
写出下列程序代码运行的结果【 】。
include<iostream.h>
class A{
public:
virtual void disp() {cout<<" calss A!" <<(end1;}
}:
class B: public A{
public:
void disp() {cout<<" class B! " <<end1:}
};
class C: public A{
public:
void disp() {cout<<"class C! " (<end1;}
};
void main() {
A a, *ptr;
B b;
C c;
a. disp();
b. disp();
c. disp();
ptr=&b;
ptr->disp();
ptr=&c;
ptr->disp():
}