Question

Qt 4类中定义字段QPen pen； 编译显示字段‘pen’类型不完全，求高手解释！

Answer 1

不完全?
发代码和错误提示.

追问

In file included from ../paint/main.cpp:3:
../paint/paintarea.h:27: 错误：字段‘pen’类型不完全
make: Leaving directory `/opt/mini6410/paint-build-desktop'
make: *** [main.o] 错误 1

private:
Ui::PaintArea *ui;
Shape shape;
QBrush brush;
QPen pen;

追答

添加
#include
#include