嵌入式QT實(shí)驗(yàn)報(bào)告簡單計(jì)算器的設(shè)計(jì)文檔

電子科技大學(xué)學(xué)生實(shí)驗(yàn)報(bào)告書課程名稱實(shí)用嵌入式應(yīng)用系統(tǒng)設(shè)計(jì)與實(shí)現(xiàn)任課老師實(shí)驗(yàn)名稱簡單功能計(jì)算器的設(shè)計(jì)學(xué)生姓名學(xué)生學(xué)號學(xué)生學(xué)院2015—2016學(xué)年第1學(xué)期實(shí)驗(yàn)項(xiàng)目名稱簡單功能計(jì)算器的設(shè)計(jì)實(shí)驗(yàn)日期

一、實(shí)驗(yàn)內(nèi)容1、設(shè)計(jì)一個(gè)簡單計(jì)算器并能完成簡單的四則運(yùn)算，實(shí)時(shí)更新運(yùn)算結(jié)果；2、帶界面計(jì)算器自帶數(shù)字及功能按鈕，能實(shí)現(xiàn)更多以及更靈活的的計(jì)算功能。一、實(shí)驗(yàn)步驟設(shè)計(jì)（包括實(shí)驗(yàn)方案設(shè)計(jì)、實(shí)驗(yàn)步驟或算法描述等）實(shí)驗(yàn)設(shè)計(jì)方案如下：圖1簡單計(jì)算器的設(shè)計(jì)方案流程方案流程圖2帶顯示界面計(jì)算器的設(shè)計(jì)實(shí)驗(yàn)步驟：一、簡單計(jì)算器的設(shè)計(jì)：1、創(chuàng)建一個(gè)QtGUI應(yīng)用項(xiàng)目，項(xiàng)目名稱為dialog_designer,基類選擇Qwidget。項(xiàng)目建好后會(huì)自動(dòng)生成一系列文件，雙擊界面文件widget.ui進(jìn)入QtDesigner進(jìn)行界面設(shè)計(jì)。2、界面設(shè)計(jì)完成后修改控件的各屬性，并修改Tab順序，點(diǎn)擊工具欄上的的“編輯Tab順序”按鈕，依次按順序點(diǎn)擊即可，完成后再按工具欄上的編輯控件按鈕返回。3、在頭文件widget.h的Widget類添加共有槽函數(shù);在源文件widget.cpp中添加新代碼。

4、用模擬器調(diào)試運(yùn)行。二、帶界面的計(jì)算器的設(shè)計(jì)：與簡單計(jì)算器的設(shè)計(jì)步驟基本相同。但是需要在項(xiàng)目文件（后綴為.pro）添加一段代碼，使得程序中能使用Qt腳本，在原有代碼的基礎(chǔ)上添加。在頭文件widget.h的Widget類添加共有槽函數(shù)和全局變量，以及包含頭文件QtScript，以使用QtScriptAPI。在源文件widget.cpp中添加新代碼，之后即可運(yùn)行調(diào)試。三、實(shí)驗(yàn)結(jié)果分析及代碼（包括結(jié)果描述、綜合分析及實(shí)現(xiàn)關(guān)鍵代碼）實(shí)驗(yàn)結(jié)果如下：1、簡單計(jì)算器：代碼：（1）在widget.h文件中#ifndefWIDGET_H#defineWIDGET_H#include<QWidget>namespaceUi{classWidget;

}classWidget:publicQWidget{Q_OBJECTpublic:explicitWidget(QWidget*parent=0);Widget~();privateslots:voidon_doubleSpinBox_1_valueChanged();voidon_doubleSpinBox_2_valueChanged();voidon_doubleSpinBox_3_valueChanged();voidon_doubleSpinBox_4_valueChanged();voidon_doubleSpinBox_5_valueChanged();voidon_doubleSpinBox_6_valueChanged();voidon_doubleSpinBox_7_valueChanged();

voidon_doubleSpinBox_8_valueChanged();private:Ui::Widget*ui;};#endif//WIDGET_H（2）在widget.cpp源文件中#include#includeWidget::Widget(QWidget*parent):QWidget(parent),ui(newUi::Widget){ui->setupUi(this);}voidWidget::on_doubleSpinBox_1_valueChanged()

{ui->outout_plus->setText(QString::number(ui->doubleSpinBox_1->value()+ui->doubleSpinBox_2->value()));}voidWidget::on_doubleSpinBox_2_valueChanged(){ui->outout_plus->setText(QString::number(ui->doubleSpinBox_1->value()+ui->doubleSpinBox_2->value()));}voidWidget::on_doubleSpinBox_3_valueChanged(){ui->outout_minus->setText(QString::number(ui->doubleSpinBox_3->value()-ui->doubleSpinBox_4->value()));}voidWidget::on_doubleSpinBox_4_valueChanged(){ui->outout_minus->setText(QString::number(ui->doubleSpinBox_3->value(

)-ui->doubleSpinBox_4->value()));}voidWidget::on_doubleSpinBox_5_valueChanged(){ui->outout_multi->setText(QString::number(ui->doubleSpinBox_5->value()*ui->doubleSpinBox_6->value()));}voidWidget::on_doubleSpinBox_6_valueChanged(){ui->outout_multi->setText(QString::number(ui->doubleSpinBox_5->value()*ui->doubleSpinBox_6->value()));}voidWidget::on_doubleSpinBox_7_valueChanged(){ui->outout_div->setText(QString::number(ui->doubleSpinBox_7->value()/ui->doubleSpinBox_8->value()));

}voidWidget::on_doubleSpinBox_8_valueChanged(){ui->outout_div->setText(QString::number(ui->doubleSpinBox_7->value()/ui->doubleSpinBox_8->value()));}Widget::~Widget(){deleteui;}2、帶顯示界面的計(jì)算器：代碼：（1）在shiyanB.pro項(xiàng)目文件中QT+=coreguiQT+=scriptgreaterThan(QT_MAJOR_VERSION,4):QT+=widgets

TARGET=shiyanBTEMPLATE=appSOURCES+=widget.cppHEADERS+=widget.hFORMS+=widget.ui（2）在頭文件widget.h中#ifndefWIDGET_H#defineWIDGET_H#include<QtScript>#includenamespaceUi{classWidget;}classWidget:publicQWidget

{Q_OBJECTpublic:QStringsum;//全局變量。explicitWidget(QWidget*parent=0);~Widget();publicslots:voidclickNum1();//按鈕1的槽函數(shù)。voidclickNum2();//按鈕2的槽函數(shù)。voidclickNum3();//按鈕3的槽函數(shù)。voidclickNum4();//按鈕4的槽函數(shù)。voidclickNum5();//按鈕5的槽函數(shù)。voidclickNum6();//按鈕6的槽函數(shù)。voidclickNum7();//按鈕7的槽函數(shù)。voidclickNum8();//按鈕8的槽函數(shù)。

voidclickNum9();//按鈕9的槽函數(shù)。voidclickNum0();//按鈕0的槽函數(shù)。voidclickPoint();//按鈕.的槽函數(shù)。voidclickLbracket();//按鈕(的槽函數(shù)。voidclickRbracket();//按鈕)的槽函數(shù)。voidclickClean();//按鈕clean的槽函數(shù)。voidclickDelete();//按鈕delete的槽函數(shù)。voidclickPlus();//按鈕+的槽函數(shù)。voidclickMinus();//按鈕-的槽函數(shù)。voidclickMulti();//按鈕*的槽函數(shù)。voidclickDiv();//按鈕/的槽函數(shù)。voidclickEqul();//按鈕=的槽函數(shù)。private:Ui::Widget*ui;};

#endif//WIDGET_H（3）在源文件widget.cpp中#include#includeWidget::Widget(QWidget*parent):QWidget(parent),ui(newUi::Widget){ui->setupUi(this);sum=;connect(ui->pushButton_1,SIGNAL(clicked()),this,SLOT(clickNum1()));connect(ui->pushButton_2,SIGNAL(clicked()),this,SLOT(clickNum2()));connect(ui->pushButton_3,SIGNAL(clicked()),this,SLOT(clickNum3()));connect(ui->pushButton_4,SIGNAL(clicked()),this,SLOT(clickNum4()));connect(ui->pushButton_5,SIGNAL(clicked()),this,SLOT(clickNum5()));connect(ui->pushButton_6,SIGNAL(clicked()),this,SLOT(clickNum6()));connect(ui->pushButton_7,SIGNAL(clicked()),this,SLOT(clickNum7()));connect(ui->pushButton_8,SIGNAL(clicked()),this,SLOT(clickNum8()));connect(ui->pushButton_9,SIGNAL(clicked()),this,SLOT(clickNum9()));

connect(ui->pushButton_0,SIGNAL(clicked()),this,SLOT(clickNum0()));connect(ui->pushButton_point,SIGNAL(clicked()),this,SLOT(clickPoint()));connect(ui->pushButton_lbracket,SIGNAL(clicked()),this,SLOT(clickLbracket()));connect(ui->pushButton_rbracket,SIGNAL(clicked()),this,SLOT(clickRbracket()));connect(ui->pushButton_clean,SIGNAL(clicked()),this,SLOT(clickClean()));connect(ui->pushButton_delete,SIGNAL(clicked()),this,SLOT(clickDelete()));connect(ui->pushButton_plus,SIGNAL(clicked()),this,SLOT(clickPlus()));connect(ui->pushButton_minus,SIGNAL(clicked()),this,SLOT(clickMinus()));connect(ui->pushButton_multi,SIGNAL(clicked()),this,SLOT(clickMulti()));connect(ui->pushButton_div,SIGNAL(clicked()),this,SLOT(clickDiv()));connect(ui->pushButton_equl,SIGNAL(clicked()),this,SLOT(clickEqul()));

}voidWidget::clickNum1()//按鈕1的槽函數(shù)。{QStringnum1=;QStringstr=ui->lineEdit->text();str=str+num1;if(ui->lineEdit->text()==){ui->lineEdit->setText(num1);}else{ui->lineEdit->setText(str);}}

voidWidget::clickNum2()//按鈕2的槽函數(shù)。{QStringnum1=;QStringstr=ui->lineEdit->text();str=str+num1;if(ui->lineEdit->text()==){ui->lineEdit->setText(num1);}else{ui->lineEdit->setText(str);}}voidWidget::clickNum3()//按鈕3的槽函數(shù)。

{QStringnum1=;QStringstr=ui->lineEdit->text();str=str+num1;if(ui->lineEdit->text()==){ui->lineEdit->setText(num1);}else{ui->lineEdit->setText(str);}}voidWidget::clickNum4()//按鈕4的槽函數(shù)。{

QStringnum1=;QStringstr=ui->lineEdit->text();str=str+num1;if(ui->lineEdit->text()==){ui->lineEdit->setText(num1);}else{ui->lineEdit->setText(str);}}voidWidget::clickNum5()//按鈕5的槽函數(shù)。{QStringnum1=;

QStringstr=ui->lineEdit->text();str=str+num1;if(ui->lineEdit->text()==){ui->lineEdit->setText(num1);}else{ui->lineEdit->setText(str);}}voidWidget::clickNum6()//按鈕6的槽函數(shù)。{QStringnum1=;QStringstr=ui->lineEdit->text();

str=str+num1;if(ui->lineEdit->text()==){ui->lineEdit->setText(num1);}else{ui->lineEdit->setText(str);}}voidWidget::clickNum7()//按鈕7的槽函數(shù)。{QStringnum1=;QStringstr=ui->lineEdit->text();str=str+num1;

if(ui->lineEdit->text()==){ui->lineEdit->setText(num1);}else{ui->lineEdit->setText(str);}}voidWidget::clickNum8()//按鈕8的槽函數(shù)。{QStringnum1=;QStringstr=ui->lineEdit->text();str=str+num1;if(ui->lineEdit->text()==)

{ui->lineEdit->setText(num1);}else{ui->lineEdit->setText(str);}}voidWidget::clickNum9()//按鈕9的槽函數(shù)。{QStringnum1=;QStringstr=ui->lineEdit->text();str=str+num1;if(ui->lineEdit->text()==){

ui->lineEdit->setText(num1);}else{ui->lineEdit->setText(str);}}voidWidget::clickNum0()//按鈕0的槽函數(shù)。{QStringnum1=;QStringstr=ui->lineEdit->text();str=str+num1;if(ui->lineEdit->text()==){ui->lineEdit->setText(num1);

}else{ui->lineEdit->setText(str);}}voidWidget::clickPoint()//按鈕point的槽函數(shù)。{QStringnum1=;QStringnum2=;QStringstr=ui->lineEdit->text();str=str+num1;if(ui->lineEdit->text()==){ui->lineEdit->setText(num2);

}else{ui->lineEdit->setText(str);}}voidWidget::clickLbracket()//按鈕lbracket的槽函數(shù)。{QStringnum1=;QStringstr=ui->lineEdit->text();str=str+num1;if(ui->lineEdit->text()==){ui->lineEdit->setText(num1);}

else{ui->lineEdit->setText(str);}}voidWidget::clickRbracket()//按鈕rbracket的槽函數(shù)。{QStringnum1=;QStringstr=ui->lineEdit->text();str=str+num1;if(ui->lineEdit->text()==){ui->lineEdit->setText(num1);}else

{ui->lineEdit->setText(str);}}voidWidget::clickClean()//按鈕clean的槽函數(shù)。{QStringnum1=;ui->lineEdit->setText(num1);}voidWidget::clickDelete()//按鈕delete的槽函數(shù)。{QStringa=;QStringstr=ui->lineEdit->text();if(str.length()==1){

ui->lineEdit->setText(a);}elseif(str.length()>1){str=str.left(str.length()-1);//從左邊取長度減去1的字符串。ui->lineEdit->setText(str);}}voidWidget::clic