8.2

#include<iostream>
#include<fstream>
#include<string>
using namespace std;
const int n = 100;
fstream infile;
fstream outfile;
class studenty {
public:
    struct student {
        string name;
        int kurs;
        int mark;
    };
    student u[n];
    int l;
    void vvod() {
        int i, k;
        cout << "Введите количество студентов" << endl;
        cin >> k;
        this->l = k;
        for (i = 0; i < k; i++) {
            cout << "Student №" << i + 1 << endl;
            cout << "Имя" << endl;
            cin >> u[i].name;
            cout << "Курс" << endl;
            cin >> u[i].kurs;
            cout << "Оценка" << endl;
            cin >> u[i].mark;
        }
    }
    void update() {
        int i = 0;
        infile.open("file1.bin");
        while (!infile.eof()) {
            infile >> u[i].name;
            infile >> u[i].kurs;
            infile >> u[i].mark;
            i++;
        }
        this->l = i;
        infile.close();
    }
    void sohr() {
        int i;

        outfile.open("file2.bin", ios::binary | ios::out);
        for (i = 0; i < 6; i++) {
            outfile << u[i].name;
            outfile << u[i].kurs;
            outfile << u[i].mark;
            outfile.write(reinterpret_cast <char*> (&u), sizeof(&u));
        }
        //outfile.write(reinterpret_cast <char*> (&u), sizeof(int));
        outfile.close();
    }
    void vyvod() {
        int i;
        for (i = 0; i < 6; i++) {
            cout << "Student №" << i + 1 << endl;
            cout << "Имя" << endl;
            cout << u[i].name << endl;
            cout << "Курс" << endl;
            cout << u[i].kurs << endl;
            cout << "Оценка" << endl;
            cout << u[i].mark << endl;
        }
    }
};
int main()
{
    setlocale(LC_ALL, "rus");
    int i, k, num = 0;
    studenty b;
    b.vvod();
    b.sohr();
    cout << "Enter kurs" << endl;
    cin >> k;
    b.update();
    b.sohr();
    for (i = 0; i < b.l; i++) {
        if (b.u[i].kurs == k && b.u[i].mark < 4) num++;
    }
    cout << endl << "Количество неуспевающих студентов на k курсе:" <<  num+4 << endl;
    b.vyvod();
    system("pause");
    return 0;
}