Displaying integer value

reshu

HI
I have to take 2 bytes from Qbytearray and display it as signed int in Line edit. is it possible.
for eg: if my byte 0 is 03 and byte1 is FF--> my data =03ff which is 1023.
i want to display in line edit as 1023.
i tried like this
ui-> value-> setText(QByteArray().append(Buffer[2]).append(Buffer[1]).toHex()); the value in line edit is 0a17.
In addition i have to do some calculations on the data 03ff and finally display a signed integer value in line edit. please help.

Bonnie

Hello again!
I assume:

Buffer[1] = 0x03;
Buffer[2] = 0xff;

then you can get the interger like this

#include <QtEndian>

qint16 integer= qFromBigEndian<qint16>(Buffer.constData() + 1);

then you can convert it to text

ui->value->setText(QString::number(integer));

If you want to use toHex() you should use like this

int integer = Buffer.mid(1, 2).toHex().toInt(nullptr, 16);

Buffer.mid(1, 2) means to get a new byte array from index 1, and for length = 2
toInt(nullptr, 16) means convert a string to int using base 16, aka, hex.
But this seems a little unnecessary, it is basiclly convert number to string and then convert back to number again.

reshu

@Bonnie said in Displaying integer value:

@Bonnie
it worked perfectly. thank u for the support