Install QT5.1 in ubuntukylin 13.04

[qazaq408]

my OS is ubuntuylin 13.04,I download QT 5.1 int http://qt-project.org,

then I use- cmd "chmod 755 ./QT......run"
"./QT.....run"

try to install QT5.1 and finish it work. and I going to make a first QT project.

I edit simple code by VIM, and move the file to a new file directory.(path = /home/jxf/gui)

I use cmd " cd /home/jxf/gui"
"qmake -project"

and system tell me " qmake: could not find a Qt installation of ' ' ".....

~try again
now I use the IDE(QT creator)

the question is "can't find file or directory"(it's chinese error ,I try to translate,my english is poor.........)

code :
#include<QApplication> // <==this line ,IDE tell me "can't find file or directory"

#include<QLabel>

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

{

 QApplication app(argc,argv);

 QLabel label = new QLabel("hello QT!");

 label->show();

return app.exec();

}

what should I do ......

[qazaq408]

@#include<QApplication> // <==this line ,IDE tell me “can’t find file or directory”
#include<QLabel>
int main(int argc, char* argv[])
{
QApplication app(argc,argv);
QLabel label = new QLabel(“hello QT!”);
label->show();
return app.exec();
}
@

[SGaist]

Hi and welcome to devnet,

Since you are using Qt 5 you are missing:

@QT += widgets@

in your pro file

[qazaq408]

excuse me..
I'm a noob and thanks your E-mail,

first,I building a new file that include these code.
@
#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();
}
@

the name of file is qt.cpp.(path = /home/jxf/gui)

the second ,cmd "cd /home/jxf/gui"
so far,everything go well,

for build a .pro, I use cmd "qmake -project", if all go well, I'll get a .pro(file).
but systen tell me " qmake: could not find a Qt installation of '' "

what happen....

[SGaist]

Are you sure you are using the qmake from Qt 5.1 ?

[guru]

use this in your terminal mode:

@sudo apt-get install build-essential@