text: #ifndef __Student_H__
  #define __Student_H__
  
  #include <iostream>
  
  using namespace std;
  
  class Student {
    string imie;
    string nazwisko;
    int indeks;
  
  public:
    Student();
    Student(string a, string b, int c);
  
    friend bool operator<(const Student &s1, const Student &s2);
    friend ostream &operator<<(ostream &strumien, const Student &s);
  };
  
  #endif
  