pashok

#include<iostream>
#include<fstream>
using namespace std;
fstream infile("file.bin");
class student {
public:
    class stud {
    public:
        string name;
        string surname;
        string lastname;
        char sex;
        int age;
        int kurs;
        int mark;
    };
    stud stu;
public:
    void vvod() {
        cout << "Enter name" << endl;
        cin >> stu.name;
        cout << "Enter surname" << endl;
        cin >> stu.surname;
        cout << "Enter lastname" << endl;
        cin >> stu.lastname;
        cout << "Enter sex(m - male, f - female)" << endl;
        cin >> stu.sex;
        cout << "Enter age" << endl;
        cin >> stu.age;
        cout << "Enter kurs" << endl;
        cin >> stu.kurs;
        cout << "Enter mark" << endl;
        cin >> stu.mark;
        infile.open("file.bin", ios::out);
        infile.write(stu.name.c_str(), stu.name.length() + 1);
        infile.write(stu.surname.c_str(), stu.surname.length() + 1);
        infile.write(stu.lastname.c_str(), stu.lastname.length() + 1);
        infile.write(reinterpret_cast <char*> (&stu.sex), sizeof(char));
        infile.write(reinterpret_cast <char*> (&stu.age), sizeof(int));
        infile.write(reinterpret_cast <char*> (&stu.kurs), sizeof(int));
        infile.write(reinterpret_cast <char*> (&stu.mark), sizeof(int));
        infile.close();
    }
    void vyvod() {
        infile.open("file.bin", ios::binary);
        while (!infile.eof()) {
            infile >> stu.name;
            cout << "Name:" << stu.name << endl;
            infile >> stu.surname;
            cout << "Surname:" << stu.surname << endl;
            infile >> stu.lastname;
            cout << "Lastame:" << stu.lastname << endl;
            infile >> stu.sex;
            cout << "Sex:" << stu.sex << endl;
            infile >> stu.age;
            cout << "Age:" << stu.age << endl;
            infile >> stu.kurs;
            cout << "Kurs:" << stu.kurs << endl;
            infile >> stu.mark;
            cout << "Mark:" << stu.mark << endl;
        }
        infile.close();
    }
    void poisk() {
        int num = 0;;
        string n, s, l;
        char m;
        int a, k, ma;
        cout << "Enter name" << endl;
        cin >> n;
        infile.open("file.bin");
        cout << "students with name " << n << ":" << endl;;
        while (!infile.eof()) {
            infile >> stu.name;
            infile >> stu.surname;
            infile >> stu.lastname;
            infile >> stu.sex;
            infile >> stu.age;
            infile >> stu.kurs;
            infile >> stu.mark;
            if (stu.name == n) {
                cout << stu.name << " " << stu.surname << " " << stu.lastname << " " << stu.sex << " " << stu.age << " " << stu.kurs << " " << stu.mark << endl;
                num++;
            }
        }
        infile.close();
        if (num != 1) {
            cout << "enter surname" << endl;
            cin >> s;
            infile.open("file.bin");
            cout << "students with name and surname" << n << " " << s << ":" << endl;
            num = 0;
            while (!infile.eof()) {
                infile >> stu.name;
                infile >> stu.surname;
                infile >> stu.lastname;
                infile >> stu.sex;
                infile >> stu.age;
                infile >> stu.kurs;
                infile >> stu.mark;
                if (stu.surname == s && stu.name == n) {
                    cout << stu.name << " " << stu.surname << " " << stu.lastname << " " << stu.sex << " " << stu.age << " " << stu.kurs << " " << stu.mark << endl;
                    num++;
                }
            }
            infile.close();
            if (num != 1) {
                cout << "enter lastname";
                cin >> l;
                cout << "students with name and surname nad last name " << n << " " << s << " " << l << ":" << endl;
                num = 0;
                infile.open("file.bin");
                while (!infile.eof()) {
                    infile >> stu.name;
                    infile >> stu.surname;
                    infile >> stu.lastname;
                    infile >> stu.sex;
                    infile >> stu.age;
                    infile >> stu.kurs;
                    infile >> stu.mark;
                    if (stu.name == n && stu.surname == s && stu.lastname == l) {
                        cout << stu.name << " " << stu.surname << " " << stu.lastname << " " << stu.sex << " " << stu.age << " " << stu.kurs << " " << stu.mark << endl;
                        num++;
                    }
                }
                infile.close();
                if (num != 1) {
                    cout << "enter sex";
                    cin >> m;
                    cout << "students with name and surname and lastname and sex " << n << " " << s << " " << l << " " << s << ":" << endl;
                    num = 0;
                    infile.open("file.bin");
                    while (!infile.eof()) {
                        infile >> stu.name;
                        infile >> stu.surname;
                        infile >> stu.lastname;
                        infile >> stu.sex;
                        infile >> stu.age;
                        infile >> stu.kurs;
                        infile >> stu.mark;
                        if (n == stu.name && stu.surname == s && stu.lastname == l && stu.sex == m) {
                            cout << stu.name << " " << stu.surname << " " << stu.lastname << " " << stu.sex << " " << stu.age << " " << stu.kurs << " " << stu.mark << endl;
                            num++;
                        }
                    }
                    infile.close();
                    if (num != 1) {
                        cout << "enter age";
                        cin >> a;
                        cout << "students with name and surname and lastname and sex and age " << n << " " << s << " " << l << " " << s << " " << a << ":" << endl;
                        num = 0;
                        infile.open("file.bin");
                        while (!infile.eof()) {
                            infile >> stu.name;
                            infile >> stu.surname;
                            infile >> stu.lastname;
                            infile >> stu.sex;
                            infile >> stu.age;
                            infile >> stu.kurs;
                            infile >> stu.mark;
                            if (n == stu.name && stu.surname == s && stu.lastname == l && stu.sex == m && stu.age == a) {
                                cout << stu.name << " " << stu.surname << " " << stu.lastname << " " << stu.sex << " " << stu.age << " " << stu.kurs << " " << stu.mark << endl;
                                num++;
                            }
                        }
                        infile.close();
                        if (num != 1) {
                            cout << "enter kurs";
                            cin >> k;
                            cout << "students with name and surname and lastname and sex and age and kurs " << n << " " << s << " " << l << " " << s << " " << a << " " << k << ":" << endl;
                            num = 0;
                            infile.open("file.bin");
                            while (!infile.eof()) {
                                infile >> stu.name;
                                infile >> stu.surname;
                                infile >> stu.lastname;
                                infile >> stu.sex;
                                infile >> stu.age;
                                infile >> stu.kurs;
                                infile >> stu.mark;
                                if (n == stu.name && stu.surname == s && stu.lastname == l && stu.sex == m && stu.age == a && stu.kurs == k) {
                                    cout << stu.name << " " << stu.surname << " " << stu.lastname << " " << stu.sex << " " << stu.age << " " << stu.kurs << " " << stu.mark << endl;
                                    num++;
                                }
                            }
                            infile.close();
                            if (num != 1) {
                                cout << "enter mark";
                                cin >> ma;
                                cout << "students with name and surname and lastname and sex and age and kurs and mark " << n << " " << s << " " << l << " " << s << " " << a << " " << k << " " << ma << ":" << endl;
                                num = 0;
                                infile.open("file.bin");
                                while (!infile.eof()) {
                                    infile >> stu.name;
                                    infile >> stu.surname;
                                    infile >> stu.lastname;
                                    infile >> stu.sex;
                                    infile >> stu.age;
                                    infile >> stu.kurs;
                                    infile >> stu.mark;
                                    if (n == stu.name && stu.surname == s && stu.lastname == l && stu.sex == m && stu.age == a && stu.kurs == k && ma == stu.mark) {
                                        cout << stu.name << " " << stu.surname << " " << stu.lastname << " " << stu.sex << " " << stu.age << " " << stu.kurs << " " << stu.mark << endl;
                                        num++;
                                    }
                                }
                                infile.close();
                            }
                            else {
                                cout << "Your student:" << stu.name << " " << stu.surname << " " << stu.lastname << " " << stu.sex << " " << stu.age << " " << stu.kurs << " " << stu.mark << endl;
                            }
                        }
                        else {
                            cout << "Your student:" << stu.name << " " << stu.surname << " " << stu.lastname << " " << stu.sex << " " << stu.age << " " << stu.kurs << " " << stu.mark << endl;
                        }
                    }
                    else {
                        cout << "Your student:" << stu.name << " " << stu.surname << " " << stu.lastname << " " << stu.sex << " " << stu.age << " " << stu.kurs << " " << stu.mark << endl;
                    }
                }
                else {
                    cout << "Your student:" << stu.name << " " << stu.surname << " " << stu.lastname << " " << stu.sex << " " << stu.age << " " << stu.kurs << " " << stu.mark << endl;
                }
            }
            else {
                cout << "Your student:" << stu.name << " " << stu.surname << " " << stu.lastname << " " << stu.sex << " " << stu.age << " " << stu.kurs << " " << stu.mark << endl;
            }
        }
        else {
            cout << "Your student:" << stu.name << " " << stu.surname << " " << stu.lastname << " " << stu.sex << " " << stu.age << " " << stu.kurs << " " << stu.mark << endl;
        }
    }
    int mans(int i) {
        int num = 0;
        infile.open("file.bin", ios::beg);
        if (!infile.is_open()) cout << "open)" << endl;
        else {
            cout << "not open(" << endl;
        }
        infile.seekg(0);
        while (!infile.eof()) {
            infile >> stu.name;
            infile >> stu.surname;
            infile >> stu.lastname;
            infile >> stu.sex;
            infile >> stu.age;
            infile >> stu.kurs;
            infile >> stu.mark;
            if (stu.kurs == i && stu.sex == 'm') num++;
        }
        infile.close();
        return num;
    }
};
int main() {
    int i, k, p = 0, l;
    cout << "Enter 1 - add student in file" << endl << "2 - clear file and add students" << endl << "3-nothing" << endl;
    cin >> k;
    student b;
    if (k == 1) {
        cout << "enter kol-vo students:" << endl;
        cin >> p;
        for (i = 0; i < p; i++) {
            b.vvod();
        }
    }
    else {
        if (k == 2) {
            remove("file.bin");
            infile.open("file.bin");
            infile.close();
            cout << "Enter kol-vo students" << endl;
            cin >> p;
            for (i = 0; i < p; i++) {
                b.vvod();
            }
        }
    }
    cout << "Enter kurs" << endl;
    cin >> l;
    p = b.mans(l);
    cout << endl << p;
    return 0;
}