How to write same digit multiple times in a text file?

I have just started Operator overloading (stream insertion and stream extraction) in C++, and got stuck at point. The program should work like If user enters the value 10 then program must store 10 five times in a text file in different lines. but the program is not storing any of the value in text file.

#include<iostream>
#include<fstream>
using namespace std;
class cntr
{
private:
    int cnt;
public:
    cntr();
    friend istream& operator>>(istream& in, cntr& c);
    friend ostream& operator<<(ostream& out, cntr& c);
};
cntr::cntr()
{
    cnt = 0;
}
istream& operator>>(istream& in, cntr& c)
{
    in >> c.cnt;
    return in;
    ofstream file;
    file.open("lab5.txt", ios::app);
    if (file.is_open())
    {
        for (int i = 0; i <= 5; i++)
        {
            if (c.cnt == 10)
            {
                in >> c.cnt;
                return in;
                cout << endl;
            }
        }
    }
    else
    {
        cout << "Error!" << endl;
    }
}
ostream& operator<<(ostream& out, cntr& c)
{
    out << c.cnt;
    return out;
}
int main()
{
    cntr r;
    cin >> r;
    cout << "\n" << r << endl;
    
    return 0;
}