QFile outFile("test.txt");
QTextStream stream(&outFile);

  for (int j=1;j<40;j++)
 {
	sp.sprintf("%i",j);
	stream << sp ;
 }

 QFile data("output.txt");
 if (data.open(QFile::WriteOnly | QFile::Truncate)) {
     QTextStream out(&data);
     out << "Result: " << qSetFieldWidth(10) << left << 3.14 << 2.7 << endl;
     // writes "Result: 3.14      2.7       \n"
 }