How to convert QString to unsigned char in Qt

Praveen.Illa

Hi Team,
I am new to Qt and am trying to understand Qt conversions (like QString to unsigned char, QString to unisgned short, etc..)

I have a C code like below

unsigned short us = -1;
printf("us = %d\n", us);

The output is 65535 which is as expected (the data type range roll over happens here).

Same thing, I have tried with Qt i.e., converting QString to unsigned char or unsigned short like below

QString str = "-1";
qDebug() << "value = " << str.toUShort();

The output is 0.

How can I get the output as 65535 in Qt ?

Diracsbracket

@Praveen-Illa said in How to convert QString to unsigned char in Qt:

QString str = "-1";

toUshort() fails with negative number strings (if you use the ok argument, it will indeed return false), so you need to convert to a signed int as an intermediate step first and cast it afterwards:

    QString str = "-1";
    bool OK;
    ushort val = str.toInt(&OK);
    qDebug() << val << OK;