QTextStream write to QString ignore endl

semicloud

My program is simple

#include <QTextStream>
#include <QDebug>
#include <QString>

int main(int argc, char *argv[])
{
    QString msg;
    QTextStream stream(&msg, QIODevice::Text | QIODevice::WriteOnly);
    stream << "1" << endl;
    stream << "2" << endl;
    stream << "3";
    qDebug() << msg;   // Output "1\n2\n3"
    return 0;
}

What I want is as follows :

1
2
3

But it is seems that QTextStream totally ignore the endl manipulator. The program output is :

1\n2\n3

Besides endl, I have already tried '\n', '\r\n', but not work too.

My platform is Windows 11, the Qt version is 5.12.11(MSVC2017 64bit), and the compiler is MSVC.

Any one can help?

JKSH

Hi, and welcome!

@semicloud said in QTextStream write to QString ignore endl:

1\n2\n3

That is correct. \n is the string value of endl. This is the same debug output as qDebug() << QString("1\n2\n3");.

What I want is as follows :
1
2
3

You can do one of the following:

Write msg to a text file and open it with a text editor.
Put msg in a QLabel or QTextEdit.
Convert msg from a QString to a const char*: qDebug() << msg.toUtf8().constData();