How to use Arithmetic Operators with HexaDecimal Value in c++?

[Ramkumar Mohan]

I am writing C++ code in QT and on how to use arithmetic operators with hexadecimal values.
For example,

1. 4D + 1 = 4E
   

2. 4E - 1 = 4D
   

[J.Hilk]

@Ramkumar-Mohan the question is, where are these "HexaDecimal" values ? in your SourceCode ? than:

0x4D + 1

in strings you have stored ? convert them to ints and add them than:

myString.toInt(nullptr, 16) + 1

Anywhere else ? Then you should rethink your case, because there are no HexaDecimal values that a program works with.

[Ramkumar Mohan]

@J-Hilk @JonB

        ba[0]=0x4D;
        qDebug()<<hex<<ba[0]+1;

where, 4D is the hexadecimal value.

I have put the Hexadecimal value in QString .

code :
QString element1=list_str2.at(0).toLocal8Bit().constData();

element1 has "4D" value .

How to use string value in it. ba[0]=0x" ";

[JonB]

@Ramkumar-Mohan said in How to use Arithmetic Operators with HexaDecimal Value in c++?:

How to use string value in it. ba[0]=0x" ";

What does this mean? If you want ba to hold strings it needs to be a QVector<QString> or QStringList or a C++ array of QStrings. But then it won't hold numbers....

[Ramkumar Mohan]

@JonB

How to use string value in it. ba[0]=0x" ";

That means ,

QByteArray ba(1);

ba[0]= 0x 4D ;

4d is the hexadecimal value.

[Christian Ehrlicher]

@Ramkumar-Mohan said in How to use Arithmetic Operators with HexaDecimal Value in c++?:

4d is the hexadecimal value.

So what's wrong with

ba[0] = 0x4d

then?

and what has this to do with Qt rather than basic c stuff?

[Ramkumar Mohan]

@Christian-Ehrlicher

i already convert hexadecimal value from string

String val = MB

HexaDecimal val = 4D 42

and , we want arithmetic opertors with Hexadecimal value ,

Example ,

QByteArray ba[2];
ba[0]= 0x4D;
ba[1]= 0x42;

qDebug()<<Hex<<ba[0]+ 1<<ba[1]+2;

output:-

4E 44

It comes if you type the 4D value manually and use it. I have put that 4D hex value in string list how to use 4D data (0x4D) in string list here.
i have no idea .

[Christian Ehrlicher]

@Ramkumar-Mohan said in How to use Arithmetic Operators with HexaDecimal Value in c++?:

It comes if you type the 4D value manually and use it. I have put that 4D hex value in string list how to use 4D data (0x4D) in string list here.
i have no idea .

And I've not a single idea what you want to do and where your problem is.

Please properly describe what you want to do (and with what) and where your problem is.