Исправить ошибку в коде: Undefined symbol: Person::~Person()

#include <iostream>
#include <stdio.h>
#include <ctime>
using namespace std;
 
class Person
{
    string name;
public:
    Person() :name("none") { }
    Person(string name) :name(name) { }
    virtual void Print()const
    {
        cout << " ---------- " << name << " ---------- " << endl;
    }
   virtual ~Person() = 0;
};
 
 
class Aspirant :public Person
{
    string *subjects;
    size_t countsubjects;
 
public:
    Aspirant(string name, initializer_list<string> subjects) :Person(name)
    {
        this->countsubjects = subjects.size();
        this->subjects = new string[countsubjects];
        int i = 0;
        for (string sub: subjects)
        {
            this->subjects[i] = sub;
            i++;
        }
    }
    void Print()const override
    {
        Person::Print();
        cout << "Subject: ";
        for (int i = 0; i < countsubjects; i++)
        {
            cout << subjects[i] << " | ";
        }
        cout << endl;
    }
    ~Aspirant() override
    {
        cout << "Aspirant destructor" << endl;
        if(subjects != nullptr)
            delete[]subjects;
    }
};
 
int main()
{
    srand((unsigned)time(NULL));
//    Student st("Vasia", "Programmer");
//    st.Print();
//    Aspirant asp("Kolya", "Water Engineer", { "Recuperetion", "Python", "Trend in UI" });
//    asp.Print();
 
    Person *people[2]
    {
        //new Person ("Vasia"),
        new Aspirant ("Kolya", { "Recuperetion", "Python", "Trend in UI" }),
        new Aspirant ("Olga", { "Instagram", "Facebook"})
    };
    for (int i = 0; i < 3; i++)
    {
        people[i]->Print();
        delete people[i];
    }
 
}

virtual ~Person() = default;