C++ Writing a file inside a loop

Question

This should be counting 30 seconds down into a txt file. But it hardly ever makes the txt itself either. What am I doing wrong? Or is it that in loop c++ is just not capable of file handling. There is just nothing in the text file

for (i = 30; i >= 0; i--)
    {
        ofstream file;
        file.open("asd.txt");
        file << i;
        file.close();
        Sleep(1000);
    }

Answer 1

Move the ofstream out of the loop like this :

// ^^ There is the useless stuff
ofstream file;
for (i=0;i<maxs;i++)
{
    system("cls");
    secondsLeft=maxs-i;
    hours=secondsLeft/3600;
    secondsLeft=secondsLeft-hours*3600;
    minutes=secondsLeft/60;
    secondsLeft=secondsLeft-minutes*60;
    seconds=secondsLeft;
    cout << hours<< " : " << minutes<< " : " << seconds << " ";
    file.open ("countdown.txt", ios::trunc);
    file << hours << " : "  << minutes<< " : " << seconds;
    file.close();
    Sleep(1000);
}