#include?“circle.h“

Circle::Circle（）?{;}
Circle::~Circle（）?{;}

void?Circle::paint（QPainter?&?painter）?const?{
????QPen?pen;
????switch（_color）?{
????case?RED:
????????pen.setColor（Qt::red）;
????????break;
????case?GREEN:
????????pen.setColor（Qt::green）;
????????break;
????case?BLUE:
????????pen.setColor（Qt::blue）;
????????break;
????}
????pen.setWidth（_thick）;
????painter.setPen（pen）;

????const?float?xc?=?（start.x（）?+?end.x（））?/?2?yc?=?（start.y（）?+?end.y（））?/?2;
????const?float?r?=?sqrt（pow（（start.x（）?-?xc）?2）?+?pow（（start.y（）?-?yc）?2））;
????float?p?=?5?/?4?-?r;
????int?x?=?0?y?=?r;
????while?（x?????????painter.drawPoint（x?+?xc?y?+?yc）;
????????painter.drawPoint（x?+?xc?-y?+?yc）;
????????painter.drawPoint（-x?+?xc?y?+?yc）;
????????painter.drawPoint（-x?+?xc?-y?+?yc）;
????????painter.drawPoint（y?+?xc?x?+?yc）;
????????painter.drawPoint（y?+?xc?-x?+?yc）;
????????painter.drawPoint（-y?+?xc?x?+?yc）;
????????painter.drawPoint（-y?+?xc?-x?+?yc）;
????????if?（p?>?0?||?p?==?0）?{
????????????--y;??++x;
????????????p?=?p?+?2?*?x?+?1?-?2?*?y;
????????}
????????else?{
????????????y?=?y;??++x;
????????????p?=?p?+?2?*?x?+?1;
????????}
????}
}

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----

?????文件???????1205??2017-12-16?21:04??test\circle.cpp

?????文件????????202??2017-12-16?13:20??test\circle.h

?????文件???????1782??2017-12-16?21:04??test\ellipse.cpp

?????文件????????208??2017-12-16?18:00??test\ellipse.h

?????文件???????3500??2017-12-16?20:56??test\line.cpp

?????文件????????190??2017-12-16?02:53??test\line.h

?????文件????????271??2017-12-18?19:43??test\main.cpp

?????文件??????11211??2017-12-18?20:19??test\mainwindow.cpp

?????文件???????1343??2017-12-18?20:10??test\mainwindow.h

?????文件????????654??2017-12-18?19:46??test\mainwindow.ui

?????文件???????2073??2017-12-18?20:19??test\paintwidget.cpp

?????文件???????1175??2017-12-18?20:19??test\paintwidget.h

?????文件????????534??2017-12-16?21:04??test\rect.cpp

?????文件????????190??2017-12-16?02:12??test\rect.h

?????文件???????1469??2017-12-16?21:07??test\resource\black.png

?????文件???????1472??2017-12-09?15:34??test\resource\blue.png

?????文件???????6869??2017-12-09?10:25??test\resource\circle.png

?????文件???????5499??2017-12-09?15:19??test\resource\clear.png

?????文件???????2707??2017-12-09?10:41??test\resource\clip.png

?????文件???????5093??2017-12-09?10:25??test\resource\color.png

?????文件???????4572??2017-12-09?10:47??test\resource\curve.png

?????文件???????4602??2017-12-09?10:36??test\resource\edit.png

?????文件???????5320??2017-12-09?10:22??test\resource\ellipse.png

?????文件???????3140??2017-12-09?10:29??test\resource\fill.png

?????文件???????1472??2017-12-09?15:34??test\resource\green.png

?????文件???????1490??2017-12-09?15:39??test\resource\heavy.png

?????文件???????2217??2017-12-09?10:24??test\resource\line.png

?????文件???????1458??2017-12-09?15:39??test\resource\medium.png

?????文件???????3261??2017-12-09?15:09??test\resource\new.png

?????文件???????3312??2017-12-09?15:12??test\resource\open.png

............此處省略15個文件信息