Зукыщт / Згзшд сдфыыуы 3

#include <iostream>
#include <string>

using namespace std;

class Person{
  public:
    string firstName, secondName, thirdName;

    void print(){
      cout << "Person: { First Name: " << firstName << ", Second Name: " << secondName << ", Third Name: " << thirdName << "}";
    }

    string getString(){
      return "First Name: " + firstName + ", Second Name: " + secondName + ", Third Name: " + thirdName;
    }

    Person(string firstName, string secondName, string thirdName){
      this->firstName = firstName;
      this->secondName = secondName;
      this->thirdName = thirdName;
    }
};

class Teacher : public Person{
  public:
    string category;
    string *classes;

    Teacher(string firstName, string secondName, string thirdName, string category, string classes[], int classesLength) : Person(firstName, secondName, thirdName){
      this->category = category;
      this->classes = new string[classesLength];
      for(int i = 0; i < classesLength; i++) this->classes[i] = classes[i];
    }

    void next(){
      int l = sizeof(classes) / sizeof(classes[0]);
      string *newClasses = new string[l]; //array of classes length
      int index = 0;
      for(int i = 0; i < l; i++){
        string element = classes[i];
        int c = stoi(element.substr(0, element.length() - 1)) + 1;
        if(c <= 11){
          newClasses[index] = to_string(c) + element.substr(0, 1);
        }
      }
      classes = newClasses;
    }

    void print(){
      cout << "Teacher: {" << getString() << ", Category: " << category << ", Classes: ";
      for(int i = 0; i < sizeof(classes) / sizeof(classes[0]); i++) cout << classes[i];
      cout << "}";
    }
};

class Pupil : public Person{
  public:
    string grade, project;

    Pupil(string firstName, string secondName, string thirdName, string grade, string project) : Person(firstName, secondName, thirdName){
      this->grade = grade;
      this->project = project;
    }

    void print(){
      cout << "Pupil: {" << getString() << ", Class: " << grade << ", Project: " << project;
    }
};

void info(Person people[], int aomountToPint){
  for(int i = 0; i < aomountToPint; i++) people[i].print();
}

int main() {
  string classes[] = { "10a", "11b", "1c" };
  Teacher* teacher = new Teacher("A", "B", "C", "Biology", classes, sizeof(classes) / sizeof(classes[0]));
  cout << "Teacher before next()" << endl;
  teacher->print();
  cout << endl << "Teacher after next()" << endl;
  teacher->next();
  teacher->print();

  Person* people[] = {new Pupil("A", "B", "C", "class", "project"), teacher};
  info(*people, 2);
}