File Handling!!!

[mebingj]

I cannot write to the file and read from it
here is my code..

write:

QFile file("dd.txt");
file.open(QIODevice::WriteOnly);
QTextStream out(&file);
out<<d;
file.close();

QFile file("dd.txt");
file.open(QIODevice::WriteOnly);
QTextStream out(&file);
out<<d;
file.close();

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read:

QFile f("dd.txt");
f.open(QIODevice::ReadOnly | QIODevice::Text);
QTextStream stream(&f);
l=stream.readLine();
f.close();

QFile f("dd.txt");
f.open(QIODevice::ReadOnly | QIODevice::Text);
QTextStream stream(&f);
l=stream.readLine();
f.close();

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