#include?“calculator.h“
#include?“ui_calculator.h“

calculator::calculator（QWidget?*parent）?:
????QWidget（parent）
????ui（new?Ui::calculator）
{
????ui->setupUi（this）;
????this->setMinimumSize（300100）;
????this->setMaximumSize（300100）;
????Qobject::connect（ui->firstSIGNAL（returnPressed（））thisSLOT（on_pushButton_clicked（）））;
????Qobject::connect（ui->secondSIGNAL（returnPressed（））thisSLOT（on_pushButton_clicked（）））;

}

calculator::~calculator（）
{
????delete?ui;
}

void?calculator::on_pushButton_clicked（）
{
????float?first=ui->first->text（）.toFloat（）;
????float?second=ui->second->text（）.toFloat（）;
????float?num;

????if（ui->comboBox->currentIndex（）==0）{
????????num=first+second;
????}
????if（ui->comboBox->currentIndex（）==1）{
????????num=first-second;
????}
????if（ui->comboBox->currentIndex（）==2）{
????????num=first*second;
????}
????if（ui->comboBox->currentIndex（）==3）{
????????if（second==0）{
????????????QMessageBox::warning（this“Error?Message““Second?Can‘t?be?Zero!!“）;
????????????return;
????????}
????????num=first/second;
????}
????ui->result->setText（QString::number（num））;
}

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????目錄???????????0??2017-06-08?22:31??Ultimate1\
?????文件????????1142??2017-05-24?14:14??Ultimate1\calculator.cpp
?????文件?????????404??2017-05-24?13:50??Ultimate1\calculator.h
?????文件????????2598??2017-05-30?23:41??Ultimate1\calculator.ui
?????文件?????????775??2017-05-30?23:49??Ultimate1\clock.cpp
?????文件?????????367??2017-05-31?14:31??Ultimate1\clock.h
?????文件????????1628??2017-05-30?23:49??Ultimate1\clock.ui
?????文件????????2194??2017-05-31?14:01??Ultimate1\draw.cpp
?????文件?????????697??2017-05-31?14:02??Ultimate1\draw.h
?????文件?????????620??2017-05-30?23:42??Ultimate1\draw.ui
?????文件?????????183??2017-05-24?13:00??Ultimate1\main.cpp
?????文件?????????948??2017-05-31?18:43??Ultimate1\mainwindow.cpp
?????文件?????????815??2017-05-31?18:25??Ultimate1\mainwindow.h
?????文件????????2650??2017-05-31?18:27??Ultimate1\mainwindow.ui
?????目錄???????????0??2017-05-31?14:26??Ultimate1\resource\
?????文件?????????403??2017-05-31?18:42??Ultimate1\resource.qrc
?????目錄???????????0??2017-05-31?18:40??Ultimate1\resource\image\
?????文件????????9662??2017-05-30?23:39??Ultimate1\resource\image\caclulator.ico
?????文件????????9462??2017-05-30?23:38??Ultimate1\resource\image\clock.ico
?????文件????????9662??2017-05-30?23:38??Ultimate1\resource\image\draw.ico
?????文件???????13179??2016-03-06?20:42??Ultimate1\resource\image\meihua.jpg
?????文件???????67646??2017-05-24?13:08??Ultimate1\resource\image\pic1.ico
?????文件????????9662??2017-05-30?23:37??Ultimate1\resource\image\screenshot.ico
?????文件????????9662??2017-05-30?23:36??Ultimate1\resource\image\stopwatch.ico
?????文件????????1382??2017-05-31?13:47??Ultimate1\shotscreen.cpp
?????文件?????????653??2017-05-31?13:47??Ultimate1\shotscreen.h
?????文件????????2145??2017-05-30?23:42??Ultimate1\shotscreen.ui
?????文件????????4558??2017-05-30?23:51??Ultimate1\stopwatch.cpp
?????文件????????1053??2017-05-30?23:26??Ultimate1\stopwatch.h
?????文件????????7027??2017-05-30?23:51??Ultimate1\stopwatch.ui
?????文件?????????717??2017-05-31?18:42??Ultimate1\Ultimate1.pro
............此處省略1個文件信息