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How to print unsigned character

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  • C Offline
    C Offline
    chandradeo
    wrote on 22 Jan 2014, 12:14 last edited by
    #1

    Hi frnds i get a network packet in which hour,min and second values are sent. The type of these values are indicated as UNSIGNED CHAR. When i read the data in a char array and display it in gui like this

    @ udpSocketRxCDP->readDatagram(buffer, sizeof(buffer));
    ui->textEditsec->setText(buffer[2]); // second @

    it displays some different thing means it is not the second value.

    Can anybody tell me with explanation how should i get the correct value. Thank u all in advance

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    • S Offline
      S Offline
      sierdzio
      Moderators
      wrote on 22 Jan 2014, 12:35 last edited by
      #2

      chars, as the name suggests, are treated as characters. So it probably prints a nice letter for you :) Use this instead:
      @
      ui->textEditsec->setText(QString::number(buffer[2]));
      @

      (Z(:^

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      • C Offline
        C Offline
        chandradeo
        wrote on 22 Jan 2014, 13:23 last edited by
        #3

        [quote author="sierdzio" date="1390394128"]chars, as the name suggests, are treated as characters. So it probably prints a nice letter for you :) Use this instead:
        @
        ui->textEditsec->setText(QString::number(buffer[2]));
        @[/quote]

        Hi sierdzio thank u for ur reply. As i the buffer is a character array QString::number() doesnt takes character array as its argument as i have seen here "Your text to link here...":http://qt-project.org/doc/qt-5/qstring.html#number.

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        • S Offline
          S Offline
          SGaist
          Lifetime Qt Champion
          wrote on 22 Jan 2014, 21:24 last edited by
          #4

          Hi,

          You can type cast it as a quint8 before converting

          Hope it helps

          Interested in AI ? www.idiap.ch
          Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

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          • S Offline
            S Offline
            shree_121
            wrote on 21 Nov 2018, 06:16 last edited by
            #5

            @SGaist said in How to print unsigned character:

            type cast it as a quint8

            can you tell me how to type cast unsigned char to quint8?

            A 1 Reply Last reply 21 Nov 2018, 07:19
            0
            • S shree_121
              21 Nov 2018, 06:16

              @SGaist said in How to print unsigned character:

              type cast it as a quint8

              can you tell me how to type cast unsigned char to quint8?

              A Offline
              A Offline
              aha_1980
              Lifetime Qt Champion
              wrote on 21 Nov 2018, 07:19 last edited by aha_1980
              #6

              @shree_121

              unsigned char c = 0x55;
              
              quint8 q = quint8(c);
              

              But that's very basic C++...

              Qt has to stay free or it will die.

              1 Reply Last reply
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