First QT App

This is a discussion on First QT App within the A Brief History of Cprogramming.com forums, part of the Community Boards category; Code: #include<qapplication.h> #include<qlabel.h> int main ( int argc, char * argv[] ) { QApplication myapp (argc, argv); QLabel* mylabel = ...

  1. #1
    Banned Troll_King's Avatar
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    First QT App

    Code:
    #include<qapplication.h>
    #include<qlabel.h>
    
    int main ( int argc, char * argv[] )
    {
      QApplication myapp (argc, argv);
    
      QLabel* mylabel = new QLabel ("Hello, World", 0 );
      mylabel->resize (120, 30);
    
      myapp.setMainWidget (mylabel);
      mylabel->show();
      return myapp.exec();
    }
    Code:
    [prompt]$ g++ -I$QTDIR/include -L$QTDIR/lib -lqt -o prog prog.cpp
    [prompt]$ ./prog
    It's a QT GUI textbox. The QT 3.0 enterprise library is free with the free installation of RH 7.3. It compiled and ran with no problems using GNU Linux g++. QT a GUI emulator which is different than an API emulator or API layering. Apparently these are all tactics for cross platform compatibility. Just thought some of you might be interested.

  2. #2
    Just because ygfperson's Avatar
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    i got a seg fault when compiling and running that (redhat 7.2)

  3. #3
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    Type:

    ls -l $QTDIR/lib
    ls -l $QTDIR/include

    To see if you have QT installed properly. You should have files in those directories.

  4. #4
    Just because ygfperson's Avatar
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    i can compile fine. (i did see files in those directories, btw). it's just that running the program leads to a seg fault on my machine.

  5. #5
    Registered /usr
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    I take it then QT doesn't mean QuickTime?

  6. #6
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    It's a cross platform GUI emulator. www.trolltech.com

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