Trouble with CRC-32 function

[ChrisW67]

Here is a couple of ways (there are probably many of varying efficiency):

quint32 crc = 0x00123456;
QByteArray result = QByteArray::number(crc, 16);
result.prepend("00000000");
result = result.right(8);
qDebug() << result;
 
result = QByteArray::number(crc, 16);
result = result.rightJustified(8, '0', false);
qDebug() << result;
 
// condense the previous to
result = QByteArray::number(crc, 16).rightJustified(8, '0', false);
qDebug() << result;

quint32 crc = 0x00123456;
QByteArray result = QByteArray::number(crc, 16);
result.prepend("00000000");
result = result.right(8);
qDebug() << result;

result = QByteArray::number(crc, 16);
result = result.rightJustified(8, '0', false);
qDebug() << result;

// condense the previous to
result = QByteArray::number(crc, 16).rightJustified(8, '0', false);
qDebug() << result;

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or you could use QString::arg() and an appropriate set of parameters and have a QString return.