What will be the output of the following C++ code?

#include<iostream>
#include <fstream>
using namespace std;
int main () 
{
    ofstream outfile ("test.txt");
    for (int n = 0; n < 100; n++)
    {
        outfile << n;
        outfile.flush();
    }
    cout << "Done";
    outfile.close();
    return 0;
}