qt - 无法让 QT "hello world"工作!

Question

#include <QtCore/QCoreApplication>
#include <QtGui/QLabel>
int main(int argc, char *argv[])
{
    QCoreApplication a(argc, argv);
    QLabel label("Hello world");
    label.show();
    return a.exec();
}

我正在使用 QTCreator，我在 Windows 上安装了 QT 4.7。
现在每次编译时都会出现此错误:

:: error: collect2: ld returned 1 exit status
With mingw32 giving me the following
tmp/obj/debug_shared/main.o: In function `main': 
E:\Qt\2010.04\qt\QTHello-build-desktop/../QTHello/main.cpp:6: undefined reference to `_imp___ZN6QLabelC1ERK7QStringP7QWidget6QFlagsIN2Qt10WindowTypeEE' 
E:\Qt\2010.04\qt\QTHello-build-desktop/../QTHello/main.cpp:8: undefined reference to `_imp___ZN6QLabelD1Ev' 
E:\Qt\2010.04\qt\QTHello-build-desktop/../QTHello/main.cpp:8: undefined reference to `_imp___ZN6QLabelD1Ev' 
collect2: ld returned 1 exit status 
mingw32-make[1]: *** [debug\QTHello.exe] Error 1 
mingw32-make: *** [debug-all] Error 2 
The process "E:/Qt/2010.04/mingw/bin/mingw32-make.exe" exited with code %2.
Error while building project QTHello (target: Desktop)
When executing build step 'Make'

有什么问题？？

Answer 1

创建一个 Qt GUI 项目 然后奥尔尼写下你写的东西。