Compiling Qt 4 program in Fedora 9

[seeplusplus]

Hello Friends,

I'm learning Qt 4 and I tried to compile a simple 'Hello Qt' program but the compiler gives error even though the source code is correct.
Please help me out of this.

My program source code is:
hello.cpp

#include <QApplication>

#include <QLabel>

int main(int argc, char *argv[])

{

    QApplication app(argc, argv);

    QLabel *label = new QLabel("Hello Qt!");

    label->show();

    return app.exec();

}

and after qmake -project and qmake hello.pro, the make gives the following warning:

hello.cpp:1:24: error: QApplication: No such file or directory
hello.cpp:2:18: error: QLabel: No such file or directory
hello.cpp: In function ‘int main(int, char**)’:
hello.cpp:5: error: ‘QApplication’ was not declared in this scope
hello.cpp:5: error: expected `;' before ‘app’
hello.cpp:6: error: ‘QLabel’ was not declared in this scope
hello.cpp:6: error: ‘label’ was not declared in this scope
hello.cpp:6: error: expected type-specifier before ‘QLabel’
hello.cpp:6: error: expected `;' before ‘QLabel’
hello.cpp:8: error: ‘app’ was not declared in this scope
hello.cpp: At global scope:
hello.cpp:3: warning: unused parameter ‘argc’
hello.cpp:3: warning: unused parameter ‘argv’
make: *** [hello.o] Error 1

What should I do?

[khafa]

hi,


you are including the wrong files.

instead of

#include <QApplication>
#include <QLabel>

do

#include <qapplication.h>
#include <qlabel.h>

[seeplusplus]

I want to use Qt 4. The solution you suggested is for Qt 3 users...


Please help me compile with Qt 4.

[khafa]

sorry i havent used qt4.

but try to use

/usr/bin/qmake-qt4 -project
/usr/bin/qmake-qt4
make