相关疑难解决方法(0)

有人在IRC中提到它作为切片问题.

请考虑以下示例:

#include <iostream>
using namespace std;

class Animal
{
public:
    virtual void makeSound() {cout << "rawr" << endl;}
};

class Dog : public Animal
{
public:
    virtual void makeSound() {cout << "bark" << endl;}
};

int main()
{
    Animal animal;
    animal.makeSound();

    Dog dog;
    dog.makeSound();

    Animal badDog = Dog();
    badDog.makeSound();

    Animal* goodDog = new Dog();
    goodDog->makeSound();
}

输出是:

rawr
bark
rawr
bark

但我认为产量肯定应该是"粗树皮树皮".badDog有什么用？

更新:您可能对我的另一个问题感兴趣.