#include?“dialog.h“
#include?“ui_dialog.h“
const?static?double?PI=3.1416;
Dialog::Dialog（QWidget?*parent）?:
????QDialog（parent）
????ui（new?Ui::Dialog）
{
????ui->setupUi（this）;
}

Dialog::~Dialog（）
{
????delete?ui;
}

void?Dialog::on_countBtn_clicked（）
{
????bool?ok;
????QString?tempStr;
????QString?valueStr=ui->radiusLineEdit->text（）;
????int?valueInt=valueStr.toInt（&ok）;
????double?area=valueInt*valueInt*PI;//計算圓面積
????ui->areaLabel_2->setText（tempStr.setNum（area））;
}

void?Dialog::on_radiusLineEdit_textChanged（const?QString?&arg1）
{
????bool?ok;
????QString?tempStr;
????QString?valueStr=ui->radiusLineEdit->text（）;
????int?valueInt=valueStr.toInt（&ok）;
????double?area=valueInt*valueInt*PI;//計算圓面積
????ui->areaLabel_2->setText（tempStr.setNum（area））;
}

?屬性????????????大小?????日期????時間???名稱
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?????目錄???????????0??2021-12-24?14:26??QT5寮€鍙戝強瀹炰緥\
?????文件?????????176??2021-12-24?14:26??__MACOSX\._QT5寮€鍙戝強瀹炰緥
?????目錄???????????0??2021-12-24?14:24??QT5寮€鍙戝強瀹炰緥\CH9\
?????文件?????????176??2021-12-24?14:24??__MACOSX\QT5寮€鍙戝強瀹炰緥\._CH9
?????目錄???????????0??2021-12-24?14:24??QT5寮€鍙戝強瀹炰緥\CH7\
?????文件?????????176??2021-12-24?14:24??__MACOSX\QT5寮€鍙戝強瀹炰緥\._CH7
?????目錄???????????0??2021-12-24?14:24??QT5寮€鍙戝強瀹炰緥\CH1\
?????文件?????????176??2021-12-24?14:24??__MACOSX\QT5寮€鍙戝強瀹炰緥\._CH1
?????目錄???????????0??2021-12-24?14:24??QT5寮€鍙戝強瀹炰緥\CH6\
?????文件?????????176??2021-12-24?14:24??__MACOSX\QT5寮€鍙戝強瀹炰緥\._CH6
?????目錄???????????0??2021-12-24?14:24??QT5寮€鍙戝強瀹炰緥\CH8\
?????文件?????????176??2021-12-24?14:24??__MACOSX\QT5寮€鍙戝強瀹炰緥\._CH8
?????目錄???????????0??2021-12-24?14:24??QT5寮€鍙戝強瀹炰緥\CHflB\
?????文件?????????176??2021-12-24?14:24??__MACOSX\QT5寮€鍙戝強瀹炰緥\._CHflB
?????目錄???????????0??2021-12-24?14:24??QT5寮€鍙戝強瀹炰緥\CH12\
?????文件?????????176??2021-12-24?14:24??__MACOSX\QT5寮€鍙戝強瀹炰緥\._CH12
?????目錄???????????0??2021-12-24?14:24??QT5寮€鍙戝強瀹炰緥\CH15\
?????文件?????????176??2021-12-24?14:24??__MACOSX\QT5寮€鍙戝強瀹炰緥\._CH15
?????目錄???????????0??2021-12-24?14:24??QT5寮€鍙戝強瀹炰緥\CH14\
?????文件?????????176??2021-12-24?14:24??__MACOSX\QT5寮€鍙戝強瀹炰緥\._CH14
?????目錄???????????0??2021-12-24?14:24??QT5寮€鍙戝強瀹炰緥\CH13\
?????文件?????????176??2021-12-24?14:24??__MACOSX\QT5寮€鍙戝強瀹炰緥\._CH13
?????目錄???????????0??2021-12-24?14:24??QT5寮€鍙戝強瀹炰緥\CH3\
?????文件?????????176??2021-12-24?14:24??__MACOSX\QT5寮€鍙戝強瀹炰緥\._CH3
?????目錄???????????0??2021-12-24?14:24??QT5寮€鍙戝強瀹炰緥\CH4\
?????文件?????????176??2021-12-24?14:24??__MACOSX\QT5寮€鍙戝強瀹炰緥\._CH4
?????目錄???????????0??2021-12-24?14:24??QT5寮€鍙戝強瀹炰緥\CH5\
?????文件?????????176??2021-12-24?14:24??__MACOSX\QT5寮€鍙戝強瀹炰緥\._CH5
?????目錄???????????0??2021-12-24?14:24??QT5寮€鍙戝強瀹炰緥\CH2\
?????文件?????????176??2021-12-24?14:24??__MACOSX\QT5寮€鍙戝強瀹炰緥\._CH2
?????目錄???????????0??2021-12-24?14:24??QT5寮€鍙戝強瀹炰緥\CH18\
............此處省略1079個文件信息