Abstract class in c++

abstract-class.cpp

#include <iostream>

class Animal {
public:
    Animal(std::string name): _name(name){}
    ~Animal(){
        _name = "";
        std::cout << "deleted animal\n";
    }
    
    std::string getName(){ return _name; }
    virtual void speak() = 0;
private:
    std::string _name;
};

class Cat: public Animal {
    public:
    Cat(std::string name): Animal(name) {}
    void speak() override {
        std::cout << "Cat is speaking" << this->getName() << std::endl;
    }
};

int main()
{
  Cat cat = Cat("Meow");
  cat.speak();

  //Cat cat = new Cat("Mewo");
  //cat->speak();

  return 0;
}