Qdebug display hex value

Question

I am trying to display a number using QDebug in the Hex format. Below is the code which I have written. It is working but the output has string contents enclosed in double quot

Answer 1

qDebug() << QByteArray::number(myNumber).toHex()

Answer 2

Another way of doing this would be:

int value = 0xFFFF;
qDebug() << QString::number(value, 16);

Hope this helps.

Edit: To remove the quotes you can cast the number as a pointer, as qt will format that without using quotes. For instance:

int value = 0xFFFF;
qDebug() << (void *) value;  

Slightly hackish, but it works.

Answer 3

You could format string first:

int myValue = 0x1234;
QString valueInHex= QString("%1").arg(myValue , 0, 16);
qDebug() << "value = " << valueInHex;

Answer 4

qDebug is a debug interface. It's not meant for custom-formatted output, it's simply a way of quickly getting data in readable form. It's meant for a developer, and the quotes are there to remind you that you've output a string. qDebug() presumes that the const char* data is a message and shows it without quotes, other string types like QString are "just data" and are shown with quotes.

If you want custom formatting, don't use qDebug(), use QTextStream:

#include <QTextStream>
#include <cstdio>

QTextStream out(stdout);

void f() {
   out << "Heart-Beat : Msg ID = " << MessageID << "  Msg DLC = " << DataSize << endl;
}

Answer 5

The solution is simple:

#include <QDebug>

int value = 0x12345;
qDebug() << "Value : " << hex << value;

Answer 6

If one is not tied to use streaming operators, can go with the plain old %x and use qDebug with formatting string:

int hexnum = 0x56;
qDebug("My hex number is: %x", hexnum);

which will yield "My hex number is: 56", without quotes.