C++ 多态在子类中申请堆内存需注意这一点

#include 
#include 

using namespace std;

class Animal
{

    public:
        virtual void speaking()
        {
            cout<<"动物在叫"<speaking();
    delete animal;
}
void test()
{
    // Animal *animal = new Cat("tom");
    // animal->speaking()
    // delete animal;
    doSpeaking(new Cat("tom"));
    
}
void test01()
{
    // Dog dog;
    // doSpeaking(dog);
}
int main()
{

    test();
    return 0;
}