How to convert decimal to hexadecimal with Qt programming?

[nancyred]

Hello,
How to convert decimal to hexadecimal with Qt programming? Such as 69 switch to 45, 56 switch to 38 and so on... I try like this:

QString str = QString::number(s.at(i).unicode());
bool ok;
qDebug() << str.toUtf8();

QString str = QString::number(s.at(i).unicode());
bool ok;
qDebug() << str.toUtf8();

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but failed. I need to convert this string "E8A5" ASCII switch to hexadecimal number or string.