Output a QVector of doubles to a binary file (without using QDatastream)

[OzQTNoob]

okay so i once (a long time ago) had some code I wrote that let me write binary output files but I have lost it and cant remember how to get it working. After much trawling I am now asking for help.

So if i have a QVector<double> how can I write this to a binary file?

I know I need QFile and QByteArray (and possibly reinterpret_cast) and size_of(double) but I don't know how to put it together properly. Its driving me nuts and I am sure its probably rather simple.

Cheers

[ChrisW67]

If you do not need to worry about byte order then something like:

QVector<double> vec(1000, 0.0);
QFile file("output.bin");
if (file.open(QIODevice::WriteOnly) {
  qint64 bytesWritten = file.write(static_cast<const char*>(vec.constData()), sizeof(double) * vec.size());
}

QVector<double> vec(1000, 0.0);
QFile file("output.bin");
if (file.open(QIODevice::WriteOnly) {
  qint64 bytesWritten = file.write(static_cast<const char*>(vec.constData()), sizeof(double) * vec.size());
}

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