c++ 多态问题 真的不知道哪里错了 有兄弟给我看看吗

子类的成员变量和父类的string都进去了 但是不知道为什么 printinfo函数打印不出来 试了好多次都不行 我电脑坏了吗

#pragma once


class Animal {

public:
    Animal(std::string name,int age) {
        this->_name = name;
        this->_age = age;
    }
    virtual void printInfo() {
        
    }



protected:
    std::string _name;
    int _age;

};

class Zebra:public Animal {

public:
    Zebra(std::string name, int age, int numStripes) :Animal(name, age) {
        _numStripes = numStripes;
    }

    void printInfo() {
        std::cout << "Zebra, Name: " << this->_name << ", Age: " << Animal::_age << ", Number of stripes: " << Zebra::_numStripes << std::endl;
    }

    
protected:
    int _numStripes;

};


class Cat :public Animal {

public:
    Cat(std::string name, int age, std::string favoriteToy) :Animal(name, age) {
        this->_favoriteToy = favoriteToy;
    }

    virtual void printInfo() {
        
        std::cout << "Cat, Name: " << this->_name << ", Age: " << Animal::_age << ", Favorite of stripes: " << this->_favoriteToy << std::endl;
    }

protected:
    std::string _favoriteToy;
};

#include<iostream>
#include<string>
#include<sstream>
#include<vector>

#include"animal.h"

using namespace std;

int main() {

    vector<Animal*> animal;

    while (1) {
        string input_string;
        getline(cin, input_string);

        stringstream ss(input_string);
        string str;
        ss >> str;
        if (str == "z") {
            string name;
            ss >> name;

            int age;
            ss >> age;

            int numStripes;
            ss >> numStripes;
            Zebra z1(name, age, numStripes);
            animal.push_back(&z1);

        }

        if (str == "c") {
            string name;
            ss >> name;

            int age;
            ss >> age;

            string favoriteToy;
            ss >> favoriteToy;

            

            Cat c1(name, age, favoriteToy);
            animal.push_back(&c1);

        }

        if (str == "0") {
            for (int i = 0; i < animal.size(); i++) {
                animal[i]->printInfo();
            }
            break;
        }
    }



    return 0;
}