15/1

#include <iostream>
#include <string>
#include <fstream>


using namespace std;
void siralama(struct al* a);
void gir(struct al* a);
void yaz(struct al* a);

struct al
{
    string country;
    string city;

};
void gir(struct al* a) {

    for (int i = 0; i < 5; i++) {
        cout << "country" << i + 1 << ":";
        cin >> a[i].country;
        cout << "city" << i + 1 << ":";
        cin >> a[i].city;

    }

}
void yaz(struct al* a) {

    ofstream yap("myfile.txt", ios::binary);
    for (int i = 0; i < 5; i++) {

        yap << a[i].country << "-" << a[i].city << endl;
    }

    yap.close();

}
void siralama(struct al* a) {

    ofstream ayir("deneme2.txt", ios::binary);

    for (int i = 0; i < 5; i++) {

        if ((*(a + i)).country == "italy") {

            ayir << a[i].country << "-" << a[i].city << endl;
        }


    }
    ayir.close();
}
int main()
{

    ifstream fromfile;


    struct al a[100];
    string satir = " ";
    char b = 'n';

    do {
        cout << "select a number:" << endl;
        cout << "1-data entry:" << endl << "2-print and reading the entered data to a file:" << endl << "3:Sorting data:" << endl << "4:delete data:" << endl;
        int task;

        cin >> task;

        cin.get();
        switch (task)
        {

        case 1: {
            gir(&a[0]);

            break;

        }
        case 2: {
            ofstream yap("myfile.txt", ios::binary);
            yaz(&a[0]);
            fromfile.open("myfile.txt", ios::binary);

            while (getline(fromfile, satir)) {

                cout << satir << endl;


            }

            fromfile.close();


            yap.close();

            break;
        }

        case 3: {

            ofstream ayir("deneme2.txt",ios::binary);
            siralama(&a[0]);
            ifstream bir("deneme2.txt", ios::binary);


            while (getline(bir, satir)) {

                cout << satir << endl;


            }
            bir.close();

            ayir.close();

            break;
        }
        case 4: {
            int sonuc = remove("deneme2.txt");

            if (sonuc == 0) {

                cout << "file deleted!!" << endl;;
            }

            break;

        }
        default:

        {

            cout << "Incorect task number" << "\n";

            break;

        }




        }
        cout << "If you want to exit, input y" << endl;

        cin >> b;

        cin.ignore(256, '\n');


    } while (b != 'y'); {


        cout << "exit!!";
    }




    return 0;

}