QTextStream used for console output

Question

Hey, I'm facing this really annoying problem with QTextStream used for console output.

QTextStream cout(stdout, QIODevice::WriteOnly);
cout.setRealNumberPrecision(1);
cout.setPadChar('.');

//  some code generating values of f[i] [...]

for (int i = 10; i >= 0; i--)
{
    if (f[i] < -0.04 || f[i] > 0.04 || 1)
    {
       cout.setRealNumberNotation(QTextStream::FixedNotation);
       cout.setFieldAlignment(QTextStream::AlignRight);
       cout.setFieldWidth(8);
       cout << f[i];
       cout.setFieldAlignment(QTextStream::AlignLeft);
       cout.setFieldWidth(3);
       cout << "*x^";
       cout.setFieldAlignment(QTextStream::AlignLeft);
       cout.setNumberFlags(cout.numberFlags() & ~QTextStream::ForceSign);
       cout << i << endl;
    }
}

The results look like this with: found polynomial is:

.....0.0*x^10.
......-0.0*x^9..
.......0.0*x^8..
......-0.0*x^7..
.......0.0*x^6..
.......1.0*x^5..
.....-36.0*x^4..
.....397.0*x^3..
...-1674.0*x^2..
....2753.0*x^1..
...-1440.0*x^0..
..

I cannot get rid of this strange shift in first line, and I don't know where does .. come from. I think that there might be some problem with alignment flags, but have no idea what exactly may it is.

Thanks for help.

Answer 1

If I were to guess, I'd say the endl is being left aligned and padded to 3 characters, with the extra two characters appearing after the return so that they show up at the beginning of the next line. None on the first line and all alone on the last line. Try setting the field width back to 1 before outputting the endl.