nothing

[Albo Coder]

nothing

[Cubbi]

int a;
bio arrays[a];

Not only this is invalid C++ (array size must be const), the value of a is undefined when the array is constructed.
Why aren't you using std::vector<bio>?

[Albo Coder]

OK got it

[vlad from moscow]

You created an empty vector

vector<bio>arrays;

So it has no elements and as the consequence this code

getline (cin,arrays[i].name);

is invalid.

[Albo Coder]

#include <iostream>
#include <fstream>
#include <string>
#include <vector>
using namespace std;

struct bio{
    string name;
    string job;
    int age;
    string address;
    char gender;
    string hobby;
};
int main()
{

    int a;
    bio erin;
    vector<bio>arrays;
    char e, f, g;
    ofstream fout;
    fout.open ("1.txt", ofstream::out | std::ofstream::app);
    cout << "Sa veta do te regjistrosh? \n";
    cin >> a;
    for (int i=0;i<a;i++)
        {
            cout << "Fut emrin dhe mbiemrin\n";
            cin >> e;
            getline (cin,erin.name);
            cout << "\nFut pozicionin e punes\n";
            getline (cin,erin.job);
            cout << "\nFut moshen\n";
            cin >> erin.age;
            cout << "\nFut adresen\n";
            cin >>f;
            getline (cin,erin.address);
            cout << "\nFut gjinine\n";
            cin >> erin.gender;
            cout << "\nFut preferencat\n";
            cin >> g;
            getline (cin,erin.hobby);



            erin.name=e+erin.name;
            erin.address=f+erin.address;
            erin.hobby=g+erin.hobby;
            arrays.push_back(erin.name);
            arrays.push_back(erin.job);
            arrays.push_back(erin.age);
            arrays.push_back(erin.address);
            arrays.push_back(erin.hobby);
            fout << arrays;
        }
    fout.close();
    return 0;
}

[Albo Coder]

how to write... This is wrong too

[vlad from moscow]

This part of the updated code is also invalid.

            arrays.push_back(erin.name);
            arrays.push_back(erin.job);
            arrays.push_back(erin.age);
            arrays.push_back(erin.address);
            arrays.push_back(erin.hobby);
            fout << arrays;

[Albo Coder]

Vectors are lame... I fixed the problem

#include <iostream>
#include <fstream>
#include <string>
using namespace std;

struct bio{
    string name;
    string job;
    int age;
    string address;
    char gender;
    string hobby;
};
int main()
{
    ofstream fout;
    fout.open ("1.txt", ofstream::out | std::ofstream::app);
    cout << "Sa veta do te regjistrosh? \n";
    int a;
    char e, f, g;
    cin >> a;
    bio arrays[a];
    for (int i=0;i<a;i++)
        {
            cout << "Fut emrin dhe mbiemrin\n";
            cin >> e;
            getline (cin,arrays[i].name);
            cout << "\nFut pozicionin e punes\n";
            getline (cin,arrays[i].job);
            cout << "\nFut moshen\n";
            cin >> arrays[i].age;
            cout << "\nFut adresen\n";
            cin >>f;
            getline (cin,arrays[i].address);
            cout << "\nFut gjinine\n";
            cin >> arrays[i].gender;
            cout << "\nFut preferencat\n";
            cin >> g;
            getline (cin,arrays[i].hobby);



            arrays[i].name=e+arrays[i].name;
            arrays[i].address=f+arrays[i].address;
            arrays[i].hobby=g+arrays[i].hobby;
            fout << arrays[i].name << "\n";
            fout << arrays[i].job << "\n";
            fout << arrays[i].age << "\n";
            fout << arrays[i].address<< "\n";
            fout << arrays[i].gender << "\n";
            fout << arrays[i].hobby << "\n\n";
        }
    fout.close();
    return 0;
}

[vlad from moscow]

I do not see the necessity to use the vector in your code. It would be enough to define one object of the struct type that in loop to write its fields in the file.