#include <iostream>
#include <string>

#include <cstdlib> // урегулировывает вопрос с переменой типов данных

#include <fstream>

using std::string;
using std::cout;
using std::cin;
using std::ofstream;


struct Student {
        string last_name;
        string street;
        int house;
        int apartment;
};


void write_int(Student* array, int SIZE_ARRAY, char filename[]) {
    // делает: пишет целое число в файл

    // параметры:
    // student array: массив структуры
    // int SIZE: размер массива
    // char filename[]: имя файла для записи

    // возвращает: ничего
    cout << "начинаю печать\n";

    ofstream file;
    file.open(filename);

    for (int i = 0; i < SIZE_ARRAY; i++) {
        file << array[i].last_name << " ";
        file << array[i].street << " ";
        file << array[i].house << " ";
        file << array[i].apartment << "\n";
    }

    file.close();

}


int menu() {
    // делает: выводит меню

    // параметры:

    // возвращает: целое число - выбор пользователя
    int user_choice;

    cout << "\n[0] - check the last_name;\n";
    cout << "[1] - check the street;\n";
    cout << "[2] - check the house;\n";
    cout << "[3] - check the apartment.\n";

    cin >> user_choice;

    return user_choice;
}


int main() {
    int SIZE_ARRAY;
    cout << "Size: ";
    cin >> SIZE_ARRAY;
    // Student students[SIZE_ARRAY];
    Student *students;
    students = new Student[SIZE_ARRAY];

    for (int i = 0; i < SIZE_ARRAY; i++) {
        cout << "\nStudents #" << i + 1 << "\n";

        cout << "Input last_name of student: ";
        cin >> students[i].last_name;

        cout << "Input street of " << students[i].last_name << ": ";
        cin >> students[i].street;

        cout << "Input number house of " << students[i].last_name << ": ";
        cin >> students[i].house;

        cout << "Input number of apartment of " << students[i].last_name << ": ";
        cin >> students[i].apartment;
    }

    int user_choice = menu();

    char value_for_search[100];

    switch (user_choice) {
        case 0:
            cout << "last_name for search: ";
            cin >> value_for_search;
            break;

        case 1:
            cout << "street for search: ";
            cin >> value_for_search;
            break;

        case 2:
            cout << "house for search: ";
            cin >> value_for_search;
            break;

        case 3:
            cout << "apartment for search: ";
            cin >> value_for_search;
            break;

        default:
            break;

    }

    int count_param_in_array = 0;

    for (int i = 0; i < SIZE_ARRAY; i++) {
        if (user_choice == 0) {
            if (students[i].last_name == value_for_search) {
                count_param_in_array++;
            }
        }

        else if (user_choice == 1) {
            if (students[i].street == value_for_search) {
                count_param_in_array++;
            }
        }

        else if (user_choice == 2) {
            if (students[i].house == atoi(value_for_search)) {
                count_param_in_array++;
            }
        }

        else if (user_choice == 3) {
            if (students[i].apartment == atoi(value_for_search)) {
                count_param_in_array++;
            }
        }
    }

    cout << count_param_in_array << " answers found for this request\n";

    write_int(students, SIZE_ARRAY, "file.csv");

    return 0;
}