indi

void individual() {

    system("cls");

    ifstream fin("FILE.txt", ios::in);
    n = 0;

    while (!fin.eof()) {
        fin >> spisok[n].name;
        fin >> spisok[n].surname;
        fin >> spisok[n].patronymic;
        fin >> spisok[n].number_group;
        fin >> spisok[n].birthYear;
        fin >> spisok[n].physics;
        fin >> spisok[n].math;
        fin >> spisok[n].informatics;
        fin >> spisok[n].chemistry;
        fin >> spisok[n].gap;
        n++;
    }
    int in = 0;

    cout << "Enter number of group,which students data you want to see : ";
    cin >> in;

    ofstream fout("special.txt", ios::app);
    for (int i = 0; i < n; i++) {
        if ((spisok[i].surname[0] == 'V' || spisok[i].surname[0] == 'G' || spisok[i].surname[0] == 'D') && spisok[i].number_group == in) {
            fout << endl;
            fout << spisok[i].surname << " ";
            cout << spisok[i].surname << endl;
            fout << spisok[i].name << " ";
            cout << spisok[i].name << endl;
            fout << spisok[i].patronymic << " ";
            cout << spisok[i].patronymic << endl;
            fout << spisok[i].number_group << " ";
            cout << spisok[i].number_group << endl;
            fout << spisok[i].birthYear << " ";
            cout << spisok[i].birthYear << endl;
            fout << spisok[i].physics << " ";
            cout << spisok[i].physics << endl;
            fout << spisok[i].math << " ";
            cout << spisok[i].math << endl;
            fout << spisok[i].informatics << " ";
            cout << spisok[i].informatics << endl;
            fout << spisok[i].chemistry << " ";
            cout << spisok[i].chemistry << endl;
            fout << spisok[i].gap;
            cout << spisok[i].gap << endl;
        }
    }
}