#include <iostream>
#include <conio.h>

using namespace std;

class Student
{
    friend ostream& operator<<(ostream&, const Student&);
    friend istream& operator>>(istream&, Student&);
    string Imie;
    string Nazwisko;
public:
    Student();
    Student(string, string);
    void usun_opis();
};

ostream& operator<<(ostream& os, const Student& student)
{
    os << student.Imie << ' ' << student.Nazwisko;
    return os;
}

istream& operator>>(istream& is, Student& student)
{
    is >> student.Imie >> student.Nazwisko;
    return is;
}

Student::Student() {}
Student::Student(string name, string scnd_name) : Imie(name), Nazwisko(scnd_name) {}

void Student::usun_opis()
{
    Imie = "";
    Nazwisko = "";
}

int main()
{
    unsigned ilu = 0;
    Student tab[100];

    char komenda;
    unsigned nr;

    do
    {
        cout << "MENU:\n";
        cout << "\tN - Wprowadz dane studenta,\n";
        cout << "\tW - Wyswietl dane studentow,\n";
        cout << "\tU - Usun wybranego studenta,\n";
        cout << "\tQ - Wyjdz z programu\n";
        do
        {
            komenda = _getch();
            komenda = toupper(komenda);
        } while(komenda != 'N' && komenda != 'W' && komenda != 'U' && komenda != 'Q');
        system("cls");

        switch(komenda)
        {
        case 'N':
            cout << "Podaj imie i nazwisko studenta: ";
            cin >> tab[ilu];
            ++ilu;
            break;
        case 'W':
            for(unsigned i = 0; i < ilu; ++i)
                cout << tab[i] << endl;
            break;
        case 'U':
            cout << "Podaj nr studenta, ktorego chcesz usunac: ";
            cin >> nr;
            tab[nr].usun_opis();
            for(unsigned i = nr; i < ilu; ++i)
                tab[i] = tab[i + 1];
            --ilu;
            tab[ilu].usun_opis();
        }
    } while(komenda != 'Q');
    return 0;
}