int main(void)
{
Animal *animal = NULL;
animal = new Dog;
animal->cry();
animal->doWork();
cout << " -----" << endl;
Dog * dog = NULL;
dog = dynamic_cast<Dog*>(animal); //dynamic_cast是将父类指针转换成子类指针
if (dog != NULL) {
cout << "转换成功" << endl;
dog->cry();
dog->doWork();
}
else {
cout << "转换失败" << endl;
}
Cat *cat = NULL;
//想通过dynamic_cast 将animal转换成一个cat指针
cat = dynamic_cast<Cat*>(animal); //通过将animal指针转换成Cat指针
//尝试将一只狗转换成一只猫
if (cat != NULL) {
cout << "转换成功" << endl;
cat->cry();
cat->doWork();
}
else {
cout << "转换失败" << endl;
}
delete animal;
return 0;
}
// http://d.pr/n/16sMV
int main()
{
Animal a; Dog d;
cout << sizeof(a) << endl;
cout << sizeof(d) << endl;
Animal* p = &d;
p->cry(); // 이 순간의 정확한 원리를 생각해 봅시다.
// (*p)[0](p);
}
int main( )
{
string nam;
char s;
cin>>nam>>s;
Animal *p;
Mouse m1(nam, s);
p=&m1;
p->cry();
cin>>nam>>s;
Mouse m2(nam, s);
p=&m2;
p->cry();
cin>>nam>>s;
Cat c1(nam, s);
p=&c1;
p->cry();
cin>>nam>>s;
Dog d1(nam, s);
p=&d1;
p->cry();
return 0;
}
