QT学习之路十一（一个简易计算器）

桃扇骨 2022-07-12 13:55 210阅读 0赞

这几天一直在调试上文说到的bug，一直没有什么进展，今天我没有继续调试，而是转去做了一个简易的计算器，让我的脑子换换思路，一直想那个问题，却一直没有思路让我真的很头疼。

好了，话不多说还是直接上代码吧，思路不难，况且我做的也只是一个简易的计算器。

/********************************************************************************
    ** Form generated from reading UI file 'jisuanqi.ui'
    **
    ** Created: Sun Feb 26 21:22:25 2017
    **      by: Qt User Interface Compiler version 4.8.1
    **
    ** WARNING! All changes made in this file will be lost when recompiling UI file!
    ********************************************************************************/
    
    #ifndef UI_JISUANQI_H
    #define UI_JISUANQI_H
    
    #include <QtCore/QVariant>
    #include <QtGui/QAction>
    #include <QtGui/QApplication>
    #include <QtGui/QButtonGroup>
    #include <QtGui/QGridLayout>
    #include <QtGui/QHeaderView>
    #include <QtGui/QLabel>
    #include <QtGui/QMainWindow>
    #include <QtGui/QMenuBar>
    #include <QtGui/QPushButton>
    #include <QtGui/QStatusBar>
    #include <QtGui/QToolBar>
    #include <QtGui/QWidget>
    
    QT_BEGIN_NAMESPACE
    
    class Ui_Jisuanqi
    {
    public:
        QWidget *centralWidget;
        QWidget *gridLayoutWidget;
        QGridLayout *gridLayout;
        QPushButton *num7;
        QPushButton *num8;
        QPushButton *num9;
        QPushButton *num4;
        QPushButton *num5;
        QPushButton *num6;
        QPushButton *num3;
        QPushButton *num1;
        QPushButton *num2;
        QPushButton *num0;
        QPushButton *deng;
        QPushButton *jian;
        QPushButton *chu;
        QPushButton *cheng;
        QPushButton *add;
        QPushButton *AC;
        QLabel *label;
        QMenuBar *menuBar;
        QToolBar *mainToolBar;
        QStatusBar *statusBar;
    
        void setupUi(QMainWindow *Jisuanqi)
        {
            if (Jisuanqi->objectName().isEmpty())
                Jisuanqi->setObjectName(QString::fromUtf8("Jisuanqi"));
            Jisuanqi->resize(300, 400);
            Jisuanqi->setMinimumSize(QSize(300, 400));
            Jisuanqi->setMaximumSize(QSize(300, 400));
            centralWidget = new QWidget(Jisuanqi);
            centralWidget->setObjectName(QString::fromUtf8("centralWidget"));
            gridLayoutWidget = new QWidget(centralWidget);
            gridLayoutWidget->setObjectName(QString::fromUtf8("gridLayoutWidget"));
            gridLayoutWidget->setGeometry(QRect(10, 70, 271, 311));
            gridLayout = new QGridLayout(gridLayoutWidget);
            gridLayout->setSpacing(6);
            gridLayout->setContentsMargins(11, 11, 11, 11);
            gridLayout->setObjectName(QString::fromUtf8("gridLayout"));
            gridLayout->setContentsMargins(0, 0, 0, 0);
            num7 = new QPushButton(gridLayoutWidget);
            num7->setObjectName(QString::fromUtf8("num7"));
            num7->setMinimumSize(QSize(45, 30));
            num7->setMaximumSize(QSize(45, 30));
    
            gridLayout->addWidget(num7, 1, 0, 1, 1);
    
            num8 = new QPushButton(gridLayoutWidget);
            num8->setObjectName(QString::fromUtf8("num8"));
            num8->setMinimumSize(QSize(45, 30));
            num8->setMaximumSize(QSize(45, 30));
    
            gridLayout->addWidget(num8, 1, 1, 1, 1);
    
            num9 = new QPushButton(gridLayoutWidget);
            num9->setObjectName(QString::fromUtf8("num9"));
            num9->setMinimumSize(QSize(45, 30));
            num9->setMaximumSize(QSize(45, 30));
            QFont font;
            font.setBold(false);
            font.setWeight(50);
            num9->setFont(font);
    
            gridLayout->addWidget(num9, 1, 2, 1, 1);
    
            num4 = new QPushButton(gridLayoutWidget);
            num4->setObjectName(QString::fromUtf8("num4"));
            num4->setMinimumSize(QSize(45, 30));
            num4->setMaximumSize(QSize(45, 30));
    
            gridLayout->addWidget(num4, 2, 0, 1, 1);
    
            num5 = new QPushButton(gridLayoutWidget);
            num5->setObjectName(QString::fromUtf8("num5"));
            num5->setMinimumSize(QSize(45, 30));
            num5->setMaximumSize(QSize(45, 30));
    
            gridLayout->addWidget(num5, 2, 1, 1, 1);
    
            num6 = new QPushButton(gridLayoutWidget);
            num6->setObjectName(QString::fromUtf8("num6"));
            num6->setMinimumSize(QSize(45, 30));
            num6->setMaximumSize(QSize(45, 30));
    
            gridLayout->addWidget(num6, 2, 2, 1, 1);
    
            num3 = new QPushButton(gridLayoutWidget);
            num3->setObjectName(QString::fromUtf8("num3"));
            num3->setMinimumSize(QSize(45, 30));
            num3->setMaximumSize(QSize(45, 30));
    
            gridLayout->addWidget(num3, 3, 2, 1, 1);
    
            num1 = new QPushButton(gridLayoutWidget);
            num1->setObjectName(QString::fromUtf8("num1"));
            num1->setMinimumSize(QSize(45, 30));
            num1->setMaximumSize(QSize(45, 30));
    
            gridLayout->addWidget(num1, 3, 0, 1, 1);
    
            num2 = new QPushButton(gridLayoutWidget);
            num2->setObjectName(QString::fromUtf8("num2"));
            num2->setMinimumSize(QSize(45, 30));
            num2->setMaximumSize(QSize(45, 30));
    
            gridLayout->addWidget(num2, 3, 1, 1, 1);
    
            num0 = new QPushButton(gridLayoutWidget);
            num0->setObjectName(QString::fromUtf8("num0"));
            num0->setMinimumSize(QSize(45, 30));
            num0->setMaximumSize(QSize(45, 30));
    
            gridLayout->addWidget(num0, 4, 0, 1, 1);
    
            deng = new QPushButton(gridLayoutWidget);
            deng->setObjectName(QString::fromUtf8("deng"));
            deng->setMinimumSize(QSize(45, 30));
            deng->setMaximumSize(QSize(45, 30));
    
            gridLayout->addWidget(deng, 4, 2, 1, 1);
    
            jian = new QPushButton(gridLayoutWidget);
            jian->setObjectName(QString::fromUtf8("jian"));
            jian->setMinimumSize(QSize(45, 30));
            jian->setMaximumSize(QSize(45, 30));
    
            gridLayout->addWidget(jian, 4, 1, 1, 1);
    
            chu = new QPushButton(gridLayoutWidget);
            chu->setObjectName(QString::fromUtf8("chu"));
            chu->setMinimumSize(QSize(45, 30));
            chu->setMaximumSize(QSize(45, 30));
    
            gridLayout->addWidget(chu, 4, 4, 1, 1);
    
            cheng = new QPushButton(gridLayoutWidget);
            cheng->setObjectName(QString::fromUtf8("cheng"));
            cheng->setMinimumSize(QSize(45, 30));
            cheng->setMaximumSize(QSize(45, 30));
    
            gridLayout->addWidget(cheng, 3, 4, 1, 1);
    
            add = new QPushButton(gridLayoutWidget);
            add->setObjectName(QString::fromUtf8("add"));
            add->setMinimumSize(QSize(45, 30));
            add->setMaximumSize(QSize(45, 30));
    
            gridLayout->addWidget(add, 2, 4, 1, 1);
    
            AC = new QPushButton(gridLayoutWidget);
            AC->setObjectName(QString::fromUtf8("AC"));
            AC->setMinimumSize(QSize(45, 30));
            AC->setMaximumSize(QSize(45, 30));
    
            gridLayout->addWidget(AC, 1, 4, 1, 1);
    
            label = new QLabel(centralWidget);
            label->setObjectName(QString::fromUtf8("label"));
            label->setGeometry(QRect(10, 20, 271, 61));
            QFont font1;
            font1.setPointSize(13);
            label->setFont(font1);
            label->setAlignment(Qt::AlignRight|Qt::AlignTrailing|Qt::AlignVCenter);
            Jisuanqi->setCentralWidget(centralWidget);
            menuBar = new QMenuBar(Jisuanqi);
            menuBar->setObjectName(QString::fromUtf8("menuBar"));
            menuBar->setGeometry(QRect(0, 0, 300, 21));
            Jisuanqi->setMenuBar(menuBar);
            mainToolBar = new QToolBar(Jisuanqi);
            mainToolBar->setObjectName(QString::fromUtf8("mainToolBar"));
            Jisuanqi->addToolBar(Qt::TopToolBarArea, mainToolBar);
            statusBar = new QStatusBar(Jisuanqi);
            statusBar->setObjectName(QString::fromUtf8("statusBar"));
            Jisuanqi->setStatusBar(statusBar);
    
            retranslateUi(Jisuanqi);
    
            QMetaObject::connectSlotsByName(Jisuanqi);
        } // setupUi
    
        void retranslateUi(QMainWindow *Jisuanqi)
        {
            Jisuanqi->setWindowTitle(QApplication::translate("Jisuanqi", "Jisuanqi", 0, QApplication::UnicodeUTF8));
            num7->setText(QApplication::translate("Jisuanqi", "7", 0, QApplication::UnicodeUTF8));
            num8->setText(QApplication::translate("Jisuanqi", "8", 0, QApplication::UnicodeUTF8));
            num9->setText(QApplication::translate("Jisuanqi", "9", 0, QApplication::UnicodeUTF8));
            num4->setText(QApplication::translate("Jisuanqi", "4", 0, QApplication::UnicodeUTF8));
            num5->setText(QApplication::translate("Jisuanqi", "5", 0, QApplication::UnicodeUTF8));
            num6->setText(QApplication::translate("Jisuanqi", "6", 0, QApplication::UnicodeUTF8));
            num3->setText(QApplication::translate("Jisuanqi", "3", 0, QApplication::UnicodeUTF8));
            num1->setText(QApplication::translate("Jisuanqi", "1", 0, QApplication::UnicodeUTF8));
            num2->setText(QApplication::translate("Jisuanqi", "2", 0, QApplication::UnicodeUTF8));
            num0->setText(QApplication::translate("Jisuanqi", "0", 0, QApplication::UnicodeUTF8));
            deng->setText(QApplication::translate("Jisuanqi", "=", 0, QApplication::UnicodeUTF8));
            jian->setText(QApplication::translate("Jisuanqi", "-", 0, QApplication::UnicodeUTF8));
            chu->setText(QApplication::translate("Jisuanqi", "/", 0, QApplication::UnicodeUTF8));
            cheng->setText(QApplication::translate("Jisuanqi", "x", 0, QApplication::UnicodeUTF8));
            add->setText(QApplication::translate("Jisuanqi", "+", 0, QApplication::UnicodeUTF8));
            AC->setText(QApplication::translate("Jisuanqi", "AC", 0, QApplication::UnicodeUTF8));
            label->setText(QString());
        } // retranslateUi
    
    };
    
    namespace Ui {
        class Jisuanqi: public Ui_Jisuanqi {};
    } // namespace Ui
    
    QT_END_NAMESPACE
    
    #endif // UI_JISUANQI_H

#ifndef JISUANQI_H
    #define JISUANQI_H
    
    #include <QMainWindow>
    
    namespace Ui {
    class Jisuanqi;
    }
    
    class Jisuanqi : public QMainWindow
    {
        Q_OBJECT
        
    public:
        explicit Jisuanqi(QWidget *parent = 0);
        ~Jisuanqi();
        
    private slots:
        void on_num0_clicked();
    
        void on_num1_clicked();
    
        void on_num2_clicked();
    
        void on_num3_clicked();
    
        void on_num4_clicked();
    
        void on_num5_clicked();
    
        void on_num6_clicked();
    
        void on_num7_clicked();
    
        void on_num8_clicked();
    
        void on_num9_clicked();
    
        void on_add_clicked();
    
        void on_jian_clicked();
    
        void on_cheng_clicked();
    
        void on_chu_clicked();
    
        void on_deng_clicked();
    
        void on_AC_clicked();
    
    private:
        Ui::Jisuanqi *ui;
    };
    
    #endif // JISUANQI_H

#include "jisuanqi.h"
    #include "ui_jisuanqi.h"
    #include <QDebug>
    #include <QStack>
    
    QString str, str1;
    double result = 0;
    
    Jisuanqi::Jisuanqi(QWidget *parent) :
        QMainWindow(parent),
        ui(new Ui::Jisuanqi)
    {
        ui->setupUi(this);
    }
    
    Jisuanqi::~Jisuanqi()
    {
        delete ui;
    }
    
    void Jisuanqi::on_num0_clicked()
    {
        str = str + '0';
        this->ui->label->setText(str);
    }
    
    void Jisuanqi::on_num1_clicked()
    {
        str = str + '1';
        this->ui->label->setText(str);
    }
    
    void Jisuanqi::on_num2_clicked()
    {
        str = str + '2';
        this->ui->label->setText(str);
    }
    
    void Jisuanqi::on_num3_clicked()
    {
        str = str + '3';
        this->ui->label->setText(str);
    }
    
    void Jisuanqi::on_num4_clicked()
    {
        str = str + '4';
        this->ui->label->setText(str);
    }
    
    void Jisuanqi::on_num5_clicked()
    {
        str = str + '5';
        this->ui->label->setText(str);
    }
    
    void Jisuanqi::on_num6_clicked()
    {
        str = str + '6';
        this->ui->label->setText(str);
    }
    
    void Jisuanqi::on_num7_clicked()
    {
        str = str + '7';
        this->ui->label->setText(str);
    }
    
    void Jisuanqi::on_num8_clicked()
    {
        str = str + '8';
        this->ui->label->setText(str);
    }
    
    void Jisuanqi::on_num9_clicked()
    {
        str = str + '9';
        this->ui->label->setText(str);
    }
    
    void Jisuanqi::on_add_clicked()
    {
        str = str + '+';
        this->ui->label->setText(str);
    }
    
    void Jisuanqi::on_jian_clicked()
    {
        str = str + '-';
        this->ui->label->setText(str);
    }
    
    void Jisuanqi::on_cheng_clicked()
    {
        str = str + 'x';
        this->ui->label->setText(str);
    }
    
    void Jisuanqi::on_chu_clicked()
    {
        str = str + '/';
        this->ui->label->setText(str);
    }
    
    void Jisuanqi::on_deng_clicked()
    {
        QStack<double> num;
        QStack<char> ope;
        QString temp;
        for(int i = 0; i < str.length(); i++)
        {
            if(str[i] >= '0' && str[i] <= '9')
            {
                temp = temp + str[i];
            }
            else
            {
                num.push(temp.toDouble());
                ope.push(str[i].toAscii());
                temp = "";
            }
        }
        num.push_back(temp.toDouble());
    
        double num1,num2;
        char ope1;
    
        num1 = num.pop();
        num2 = num.pop();
        ope1 = ope.pop();
        if(ope.empty())
        {
            switch(ope1)
            {
                case '+':
                {
                    result = num1 + num2;
                    break;
                }
                case '-':
                {
                    result = num2 - num1;
                    break;
                }
                case 'x':
                {
                    result = num1 * num2;
                    break;
                }
                case '/':
                {
                    result = num2 / num1;
                    break;
                }
            }
        }
    
        QString str2 = QString("%1").arg(result);
        this->ui->label->setText(str2);
        str = "";
        result = 0;
    }
    
    void Jisuanqi::on_AC_clicked()
    {
        str = "0";
        result = 0;
        this->ui->label->setText(str);
    }

#include <QtGui/QApplication>
    #include "jisuanqi.h"
    
    int main(int argc, char *argv[])
    {
        QApplication a(argc, argv);
        Jisuanqi w;
        w.show();
        
        return a.exec();
    }