Compile a simple QTdesigner instance

Compile a simple QTdesigner instance-general Linux technology-Linux technology and application information. The following is a detailed description. I followed the practices of a small QT designer instance on the Internet, but a problem occurred during compilation.
Shown:
[Root @ localhost cfconv] # qmake-o Makefile cfconv. pro
[Root @ localhost cfconv] # make
/Usr/lib/qt-3.1/bin/uic cfconvmainform. ui-o. ui/cfconvmainform. h
G ++-c-pipe-Wall-W-O2-march = i386-mcpu = i686-g-DGLX_GLXEXT_LEGACY-fno-use-cxa-atexit-fno-exceptions tions-DQT_NO_DEBUG- i/usr/lib/qt-3.1/mkspecs/default-I. -I/usr/lib/qt-3.1/include-I. ui/-I. moc/-o. obj/main. o main. cpp
/Usr/lib/qt-3.1/bin/uic cfconvmainform. ui-I cfconvmainform. h-o. ui/cfconvmainform. cpp
G ++-c-pipe-Wall-W-O2-march = i386-mcpu = i686-g-DGLX_GLXEXT_LEGACY-fno-use-cxa-atexit-fno-exceptions tions-DQT_NO_DEBUG- i/usr/lib/qt-3.1/mkspecs/default-I. -I/usr/lib/qt-3.1/include-I. ui/-I. moc/-o. obj/cfconvmainform. o. ui/cfconvmainform. cpp
In file already ded from. ui/cfconvmainform. cpp: 22:
Cfconvmainform. ui. h: In member function 'virtual void
CfconvMainForm: convert ()':
Cfconvmainform. ui. h: 18: parse error before numeric constant
Make: *** [. obj/cfconvmainform. o] Error 1
The default program of cfconvmainform. ui. h is:
Void cfconvMainForm: convert ()
{
/* Declare some variables */
Double celsius_input, result = 0;
/* Retrieve Celsius input */
Celsius_input = celsiusLineEdit-> text (). toDouble ();
/* Convert to Fahrenheit */
Result = (celsius_input * (9.0/5.0) 32.0;
/* Enter result and clear Celsius input box */
FahrenheitLineEdit-> setText (QString: number (result, 'F', 1 ));
CelsiusLineEdit-> clear ();
}
I don't know what went wrong. Please solve it !!! : 0w5ty (1