[SOLVED] Where I should write flush() function?

[8Observer8]

Hi,

Where I should write flush() function?

Here:
[CODE]
out.flush();
[/CODE]

or here:
[CODE]
mFile.flush();
[/CODE]

[CODE]
#include <QCoreApplication>
#include <QFile>
#include <QDebug>
#include <QTextStream>

void write(QString fileName) {
QFile mFile(fileName);

if (!mFile.open(QFile::WriteOnly | QFile::Text)) {
    qDebug() << "Error: could not open file for writing";
    return;
}

QTextStream out(&mFile);
out << "Hello world";

// Here
out.flush();

// or here
mFile.flush();

mFile.close();

}

void read(QString fileName) {
QFile mFile(fileName);

if (!mFile.open(QFile::ReadOnly | QFile::Text)) {
    qDebug() << "could not open file for reading";
    return;
}

QTextStream in(&mFile);
QString mText = in.readAll();

qDebug() << mText;

mFile.close();

}

int main(int argc, char *argv[])
{
QCoreApplication a(argc, argv);

QString fileName = "C:/Test/text.txt";

write(fileName);
read(fileName);

return a.exec();

}
[/CODE]

Thank you!

[raven-worx]

in your case you can leave it out at all since it is called implicitly anyway by Qt.
On destruction of QFile close() is called which also calls flush().

[IamSumit]

Hello 8Observer8,
You need to understand the difference of these 2s:
void QTextStream::flush ()
Flushes any buffered data waiting to be written to the device.
If QTextStream operates on a string, this function does nothing.

bool QFile::flush ()
Flushes any buffered data to the file. Returns true if successful; otherwise returns false. [From Qt References]

[8Observer8]

Thank you, guys!

[Jeroentjehome]

If solved, place [SOLVED] in the title of your first post!

[8Observer8]

Sorry! Thank you :)