qtextstream & qstring

[mickey]

text ="left\n";
text =text +"right\n";
QFile f(file);
f.open(IO_WriteOnly);
QTextStream xstrm(&f);
xstrm << text;
f.close();

text ="left\n";
text =text +"right\n";
QFile f(file);
f.open(IO_WriteOnly);
QTextStream xstrm(&f);
xstrm << text;
f.close();

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I thought that this code produce a file so:

left
right

left
right

To copy to clipboard, switch view to plain text mode 

Instead:

leftright

leftright

To copy to clipboard, switch view to plain text mode 

how can I do? thanks.