QT 用UI设计界面编写电脑同款计算机标准模式

成果如下 ：

应学校老师要求，已经实现基础的计算，显示历史记录，语言播放数字的功能。

mainwindow.h文件

#ifndef MAINWINDOW_H
#define MAINWINDOW_H
#include <QVector>
#include <QMainWindow>
#include <QString>
#include <QFile>
#include "fileshow.h"
#include "ui_fileshow.h"
#include <QKeyEvent>
#include "sound.h"
#define FILEPATH "historyCaculateRecords.txt"


namespace Ui {
class MainWindow;
}

class MainWindow : public QMainWindow
{
    Q_OBJECT

public:
    explicit MainWindow(QWidget *parent = 0);
    ~MainWindow();

    //按钮链接槽函数
    void allbtnconnect();

    //输入数字的信号
    void inputNum(char num);

    //输入符号的信号
    void inputOperator(char sign);


    //对但输入数据进行处理的符号 1/x x^2 sqrt(x) +/-
    void processData(char sign);

    //输入等号的处理
    void equalCalculation();

    //数 符号 数 即+ — * / 的处理
    void ordinaryCalculation(char sign);

    //等号或者 输入两符号后的运算处理
    QString Calculate();



    //取倒数1/x
    void reciprocalCalculation();
    //平方
    void squareCalculation();
    //开根
    void openRootCalculation();
    //取反
    void reverseCalculations();
    //%百分号处理
    void percentageCalculation();



    //修改数据的三个操作
    void modifyNumbers(char sign);

    //C操作
    void clearAction();
    //CE 操作
    void clearEntryAction();
    //Del操作
    void deletAction();



    //报错 0/0：结果未定义    x/0：除数不能为0   开根负数：无效输入
    void reportError(QString error);


    //小屏显示    num:1 为过程显示    num:0   为结果显示
    void smallScreenDisplay(int num);

    //大屏幕显示   //1:输入数字1 2：输入数字2
    void largeScreenDisplay(int num);




    //写历史记录
    void writeRecords();

    //读取历史记录
    void readRecords();

    //清除历史记录
    void clearRecords();

    //播放声音
    void playSound(char sd);

    //当其他按键按下时打断结果的朗读
    void interruptTheResulreading();



private:
    Ui::MainWindow *ui;

protected:
    //键盘按下事件
    virtual void keyPressEvent(QKeyEvent *evet);

public:
    //存放输入的数
    QVector <QString> vInputStr;
    //数字1
    QString num1;
    int num1Size;
    int isSetNum1;   //是否将num1放到v容器中
    //运算符
    QString operator1;
    int isSetOpreator1;
    //数字2
    QString num2;
    int num2Size;
    int num2Lock;
    QString frontResult;

    QString sShowNum1;
    QString sShowNum2;

    QString errorsShowNum1;
    QString errorsShowNum2;
    //现在处理的数据是否经过开根 平方 或者取倒数处理
    int isProcessNum1;
    int isProcessNum2;

    QString tmpNum2;
    QString tmpOPerator1;

    //显示历史结果的界面
    FileShow *fs;

    int isSecondEqual;


};

#endif // MAINWINDOW_H

mainwindow.cpp

#include "mainwindow.h"
#include "ui_mainwindow.h"
#include <QDebug>
#include <QString>
#include <QLatin1String>
#include <QTextStream>
#include <QDir>
#include "fileshow.h"
#include "ui_fileshow.h"
#include <QSound>
#include <QChar>
#include <QMediaPlayer>
#include <QColor>
#include <QColorDialog>
extern QMediaPlayer *myPlayer;
extern QList<QString> m_lstMediaFile;


MainWindow::MainWindow(QWidget *parent) :
    QMainWindow(parent),
    ui(new Ui::MainWindow)
{
    ui->setupUi(this);
    num1="";
    num2="";
    operator1="";
    num1Size=0;
    num2Size=0;
    isSetOpreator1=0;
    isSetNum1=0;
    num2Lock=0;
    isSecondEqual=0;
//    vInputStr.push_back(num1);
//    vInputStr.push_back(operator1);
//    vInputStr.push_back(num2);
    largeScreenDisplay(1);
    isProcessNum1=0;
    isProcessNum2=0;
    fs=new FileShow();

    //结果播放
    myPlayer= new QMediaPlayer;
    myPlayer->setVolume(100);
    //将多媒体播放器状态改变的信号和 状态需要改变让下一声音播放的槽函数链接起来
//     QObject::connect(myPlayer,&QMediaPlayer::stateChanged,sltStateChanged);
    QObject::connect(myPlayer,&QMediaPlayer::stateChanged,[=](QMediaPlayer::State state){
        if (state == 0)
        {
            playMedia();
        }

    });



    //设置倍速
    myPlayer->setPlaybackRate(1.5);

    clearRecords();
    //欢迎语句
    m_lstMediaFile.append("./sound/welcome.wav");
    playMedia();
    //按钮链接
    allbtnconnect();

    QPixmap bkg("./sound/p3.jpg");
    QPalette pal;
    pal.setBrush(QPalette::Background,bkg);
    this->setPalette(pal);

    ui->label_2->setStyleSheet("QLabel{background-color:rgb(255,255,255);}");




}



MainWindow::~MainWindow()
{
    fs->close();
    delete ui;
}




 //输入数字的信号
 void MainWindow::inputNum(char num)
 {

     qDebug()<<num;
     if(isSetOpreator1==0)
     {

         //结果已经出来不可改变  只能清空num1
         if(isSetNum1==1 )
         {
             operator1="";
             num2="";
             num1="";
             num1Size=0;
             isSetNum1=0;
             sShowNum1=num1;
             sShowNum2="";
             largeScreenDisplay(1);
         }

         if(num1Size<16)
         {
             if((num1Size==1 && num1[0]=='0' && num=='0')|| (num1Size==2 && num1[0]=='-' && num1[1]=='0'&&num==0) ||(num1.indexOf(".")!=-1 && num=='.' ))
             {

             }
             else if(num1Size==1 && num1[0]=='0'&& num!='.')  //09
             {
                 num1="";
                 num1.append(num);
                 num1Size=1;
                 sShowNum1=num1;
                 largeScreenDisplay(1);
             }
             else if(num1Size==2 && num1[0]=='-' && num1[1]=='0'&&num!='.')  //-09
             {
                 num1="-";
                 num1.append(num);
                 num1Size=2;
                 sShowNum1=num1;
                 largeScreenDisplay(1);
             }
             else if(num1Size==0 && num=='.')
             {
                 num1Size+=2;
                 num1.append('0');
                 num1.append(num);
                 sShowNum1=num1;
                 largeScreenDisplay(1);
             }
             else if(num1Size==0 && num=='0')
             {

             }
             else
             {

                 num1Size+=1;
                 num1.append(num);
                 qDebug()<<num1 ;
                 sShowNum1=num1;
                 largeScreenDisplay(1);
             }

         }


     }
     else
     {
         if(num2Size<16 && num2Lock==0)
         {
             if((num2Size==1 && num2[0]=='0' && num=='0')|| (num2Size==2 && num2[0]=='-' && num2[1]=='0'&&num==0)||(num2.indexOf(".")!=-1 && num=='.' ))
             {

             }
             else if(num2Size==1 && num2[0]=='0'&& num!='.')  //09
             {
                 num2="";
                 num2.append(num);
                 num2Size=1;
//                 sShowNum2=num1;
                 largeScreenDisplay(2);
             }
             else if(num2Size==2 && num2[0]=='-' && num2[1]=='0'&&num!='.')  //-09
             {
                 num2="-";
                 num2.append(num);
                 num2Size=2;
//                 sShowNum2=num2;
                 largeScreenDisplay(2);
             }
             else if(num2Size==0 && num=='.')
             {
                 num2Size+=2;
                 num2.append('0');
                 num2.append(num);


                 if(num2Size!=0 && num2[0]=='-'){ if(num2.indexOf(".")==-1 &&num2.mid(1,1)=="0"){num2=num2.remove(1,1);}sShowNum2=num2; sShowNum2.insert(0,"("); sShowNum2.append(")");} else {if(num2.indexOf(".")==-1 && num2.mid(0,1)=="0"){num2=num2.remove(1,1);}sShowNum2=num2;}
                 largeScreenDisplay(2);
             }
             else if(num2Size==0 && num=='0')
             {

             }
             else
             {
                 num2Size+=1;
                 num2.append(num);
                 qDebug()<<num2 ;
                 if(num2Size!=0 && num2[0]=='-'){ if(num2.indexOf(".")==-1 &&num2.mid(1,1)=="0"){num2=num2.remove(1,1);}sShowNum2=num2; sShowNum2.insert(0,"("); sShowNum2.append(")");} else {if(num2.indexOf(".")==-1 && num2.mid(0,1)=="0"){num2=num2.remove(1,1);}sShowNum2=num2;}
                 largeScreenDisplay(2);
             }

         }


     }


 }

 //输入符号的信号
 void MainWindow::inputOperator(char sign)
 {
//        qDebug()<<sign;
     //num1默认为0；
        if(num1Size==0 )
        {
           num1Size=1;
            num1="0";
            sShowNum1=num1;
        }

        //对但输入数据进行处理的符号 1/x x^2 sqrt(x) +/-  %
        if(sign=='R' || sign=='2' || sign=='S' || sign=='N' || sign=='%')
        {
            processData(sign);
            qDebug()<<sign;

        }

        else if(sign=='+' || sign=='-' || sign=='*' || sign=='/')
        {
            isProcessNum1=0;
             num2Lock=0;
            ordinaryCalculation(sign);
            qDebug()<<sign;
        }

        else if(sign=='=')
        {
            num2Lock=0;
            equalCalculation();
            qDebug()<<sign;

        }
        else if(sign=='C' ||sign=='E' || sign=='D')
        {
            modifyNumbers(sign);
            qDebug()<<sign;
        }


 }





//                         R   2    S     N
 //对但输入数据进行处理的符号 1/x x^2 sqrt(x) +/-
 void MainWindow::processData(char sign)
 {

    if(sign=='R')
    {
       reciprocalCalculation();
    }
    else if(sign=='2')
    {
        squareCalculation();
    }
    else if(sign=='S')
    {
        openRootCalculation();
    }
    else if(sign=='N')
    {
        reverseCalculations();
    }
    else if(sign=='%')
    {
        percentageCalculation();
    }

    //清空tmpoperator 和tmpNum2
    tmpNum2="";
    tmpOPerator1="";
 }

 //输入等号的处理 =
 void MainWindow::equalCalculation()
 {
    qDebug()<<"issen1:"<<isSetNum1<<"num1"<<num1<<"op1"<<"n1size"<<num1Size<<operator1<<"isseo"<<isSetOpreator1<<"num2"<<num2<<"n2size"<<num2Size<<"sshown1"<<sShowNum1<<"sshN2"<<sShowNum2<<"tmpOPerator1"<<tmpOPerator1<<"tmpn2:"<<tmpNum2;

    num2Lock=0;
    if(num1Size==0)   //未输入num1
    {
        frontResult="0";
        num1="0";
//        vInputStr[0]=num1;
        num1Size=1;
        isSetNum1=1;

    }
    else if(isSetNum1==0 && num1Size!=0)  //输入了num1 但未设置
    {
        frontResult=num1;
//        vInputStr[0]=num1;
        isSetNum1=1;


    }
    //按两下等号的操作
    else if(isSetNum1==1 && isSetOpreator1==0)
    {

        if(isProcessNum1==0 && tmpOPerator1!="")
        {
            operator1=tmpOPerator1;
            isSetOpreator1=1;
            if(tmpNum2!="")
            {
                num2=tmpNum2;
                num2Size=num2.size();
                num2Lock=1;
                sShowNum2=num2;


            }
            else
            {
                operator1=tmpOPerator1;
                isSetOpreator1=1;
                num2="";
                num2Size=0;
                num2Lock=1;

            }


        }
        else if(isProcessNum1==1)
        {
            qDebug()<<"llal";
            isSetNum1=0;
            num1Size=num1.size();
        }
        else
        {
             isSetNum1=0;
        }

//        sShowNum1=num1;
//        sShowNum2=num2;
        isSecondEqual=1;
        equalCalculation();



    }
    else if(isSetNum1==1 && isSetOpreator1==1)  //设置了num1 也设置了符号 未设置num2 则使num2=num1
    {

        if(num2Size==0)
        {
            num2=num1;
            num2Size=num2.size();

        }
//        vInputStr[2]=num2;
        num1=Calculate();
//        vInputStr[0]=num1;
        isSetNum1=1;


        qDebug()<<"num2error"<<num2.size();
        qDebug()<<"num2error"<<num2;
        qDebug()<<"num2error"<<sShowNum2;
        num1Size=num1.size();
        tmpNum2=num2;

        tmpOPerator1=operator1;
        isSetOpreator1=0;
        if(isProcessNum2!=1)
        {
             if(num2Size!=0 && num2[0]=='-'){ if(num2.indexOf(".")==-1 &&num2.mid(1,1)=="0"){num2=num2.remove(1,1);}sShowNum2=num2; sShowNum2.insert(0,"("); sShowNum2.append(")");} else {if(num2.indexOf(".")==-1 && num2.mid(0,1)=="0"){num2=num2.remove(1,1);}sShowNum2=num2;}
        }
        num2="";
        num2Size=0;

    }
    if(frontResult=="error")
    {
        num1="";
//        vInputStr[0]=num1;
        isSetNum1=1;
        num1Size=num1.size();
        isSetOpreator1=0;
        num2="";
        num2Size=0;
    }
    else
    {
        qDebug()<<"isSecondEqual:::::"<<isSecondEqual<<"issen1:"<<isSetNum1<<"num1"<<num1<<"op1"<<"n1size"<<num1Size<<operator1<<"isseo"<<isSetOpreator1<<"num2"<<num2<<"n2size"<<num2Size<<"sshown1"<<sShowNum1<<"sshN2"<<sShowNum2<<"tmpOPerator1"<<tmpOPerator1<<"tmpn2:"<<tmpNum2;
        if(isSecondEqual!=1)
        {
            qDebug()<<"hh";
            writeRecords();

            smallScreenDisplay(0);
            largeScreenDisplay(0);
            sShowNum1=num1;
            sShowNum2="";
            operator1="";

            playTheWholeNumber(frontResult);
        }
        else if((isSecondEqual==1))
        {
            isSecondEqual=0;


        }

    }


    qDebug()<< frontResult;
    isProcessNum2=0;
    isProcessNum1=0;
 }

 //数 符号 数 即+ — * / 的处理
 void MainWindow::ordinaryCalculation(char sign)
 {

     //两个数和运算符都已经输入 则在输入运算符要更行num1的值和运算符
     if(isSetOpreator1==1 && num2Size!=0)
     {


                  isProcessNum2=0;
//                  vInputStr[2]=num2;
                  num1=Calculate();
                  if(frontResult!="error")
                  {
                      //smallScreenDisplay(1);
                      largeScreenDisplay(1);
                      writeRecords();
//                      vInputStr[0]=num1;
                      num1Size=num1.size();
                      operator1[0]=sign;
//                      vInputStr[1]=operator1;
                      isSetOpreator1=1;
                      num2="";
                      num2Size=0;

                      sShowNum1=num1;
                      if(num2Size!=0 && num2[0]=='-'){ if(num2.indexOf(".")==-1 &&num2.mid(1,1)=="0"){num2=num2.remove(1,1);}sShowNum2=num2; sShowNum2.insert(0,"("); sShowNum2.append(")");} else {if(num2.indexOf(".")==-1 && num2.mid(0,1)=="0"){num2=num2.remove(1,1);}sShowNum2=num2;}
                      smallScreenDisplay(1);
                  }
                  else
                  {
                      QString displayStr;
                      QString showopt;
                      if(operator1=="/")
                      {
                          showopt ="÷";
                      }
                      else if(operator1=="*")
                      {
                          showopt="×";
                      }
                      else
                      {
                          showopt=operator1;
                      }
                      QString showopt2;
                      if(sign=='/')
                      {
                          showopt2 ="÷";
                      }
                      else if(sign=='*')
                      {
                          showopt2="×";
                      }
                      else
                      {
                          showopt2+=sign;
                      }

                      displayStr=sShowNum1+showopt+sShowNum2+showopt2;
                      qDebug()<<"wwwwwwww";
                      ui->label->setText(displayStr);

                      num1="";
                      num2="";
                      operator1="";
                      num1Size=0;
                      num2Size=0;
                      isSetOpreator1=0;
                      isSetNum1=0;
                      num2Lock=0;

//                      vInputStr[0]=num1;
//                      vInputStr[1]=operator1;
//                      vInputStr[2]=num2;
                      frontResult="";
                  }





     }
     //运算符已输入 第二个数为输入则更新运算符
     else if(isSetOpreator1==1 && num2Size==0)
     {
         operator1[0]=sign;
//         vInputStr[1]=operator1;
          smallScreenDisplay(1);
     }

     //运算符还没设置则设置运算符
     else if(isSetOpreator1==0)
     {
         if(num1Size==0)
         {
             num1="0";
         }
//         vInputStr[0]=num1;
         isSetNum1=1;
         operator1[0]=sign;
//         vInputStr[1]=operator1;
         isSetOpreator1=1;
         smallScreenDisplay(1);
     }


 }

 //修改数据的三个操作 C CE del
 void MainWindow::modifyNumbers(char sign)
 {
    if(sign=='C')
    {
        clearAction();
    }
    else if(sign=='E')
    {
        clearEntryAction();
    }
    else if(sign=='D')
    {
         deletAction();
    }
 }






 //等号或者 输入两符号后的运算处理 + - * /运算
QString MainWindow::Calculate()
 {
    qDebug()<<"cacula";
    double num1d;
    num1d=num1.toDouble();
    double num2d;
    double result;
    num2d=num2.toDouble();
    qDebug()<<"aaaaa"<<"num1:"<<num1<<"num2:"<<num2d;
    qDebug()<<"aaaaa"<<"num1s:"<<num1Size<<"is1"<<isSetNum1<<"isop"<<isSetOpreator1;
    if(operator1=="+")
    {
        result=num1d+num2d;
    }
    else if(operator1=="-")
    {
         result=num1d-num2d;
    }
    else if(operator1=="*")
    {
         result=num1d*num2d;
    }
    else if(operator1=="/")
    {
        if(num2d==0)
        {
            if(num1d==0)
            {
                reportError("结果未定义");
                playError(2);
            }
            else
            {
              reportError("除数不能为0");
              playError(3);
            }
            frontResult="error";
            return "";
        }
         else
        {
            result=num1d/num2d;
        }
    }

    QString strResult;
    strResult=QString::number(result);

    qDebug()<<"num1d:"<<num1d<<"num2d:"<<num2d;
    qDebug()<<"aaaaa"<<"num1:"<<num1<<"num2:"<<num2d;
    qDebug()<<strResult;
    //qDebug()<<strResult.size();
    frontResult=strResult;
    return strResult;

 }








//取倒数1/x
void MainWindow::reciprocalCalculation()
{
    if(isSetOpreator1==0 && isSetNum1==1)
    {
        isProcessNum1=0;
    }
//    if( (num1Size!=0 && isSetNum1==0  &&isSetOpreator1==0))
    if( (isSetOpreator1==0))
    {
        double num1d;
        num1d=num1.toDouble();
        if(num1d==0)
        {
            reportError("除数不能为0");
            sShowNum1.insert(0,"1/(");
            sShowNum1.append(")");
            smallScreenDisplay(1);
            playError(3);
            num1="";
            num2="";
            operator1="";
            num1Size=0;
            num2Size=0;
            isSetOpreator1=0;
            isSetNum1=0;
            num2Lock=0;
            isProcessNum1=0;
            isProcessNum2=0;
            tmpNum2="";
            tmpOPerator1="";
        //    vInputStr[0]=num1;
        //    vInputStr[1]=operator1;
        //    vInputStr[2]=num2;
            sShowNum1=num1;
            sShowNum2=num2;

        }
        else
        {
            num1d=1/num1d;
            num1=QString::number(num1d);
            num1Size=num1.size();
            qDebug()<<"num1:"<<num1;
            isProcessNum1=1;
            sShowNum1.insert(0,"1/(");
            sShowNum1.append(")");
            smallScreenDisplay(1);
            largeScreenDisplay(1);

        }

    }
    else if(isSetOpreator1==1 )
    {

        if(num2Size==0)
        {
            num2=num1;
            if(num2Size!=0 && num2[0]=='-'){ if(num2.indexOf(".")==-1 &&num2.mid(1,1)=="0"){num2=num2.remove(1,1);}sShowNum2=num2; sShowNum2.insert(0,"("); sShowNum2.append(")");} else {if(num2.indexOf(".")==-1 && num2.mid(0,1)=="0"){num2=num2.remove(1,1);}sShowNum2=num2;}
        }
        double num2d;
        num2d=num2.toDouble();
        if(num2d==0)
        {
            reportError("除数不能为0");
            sShowNum2.insert(0,"1/(");
            sShowNum2.append(")");
            smallScreenDisplay(2);
            playError(3);
            num1="";
            num2="";
            operator1="";
            num1Size=0;
            num2Size=0;
            isSetOpreator1=0;
            isSetNum1=0;
            num2Lock=0;
            isProcessNum1=0;
            isProcessNum2=0;
            tmpNum2="";
            tmpOPerator1="";
        //    vInputStr[0]=num1;
        //    vInputStr[1]=operator1;
        //    vInputStr[2]=num2;
            sShowNum1=num1;
            sShowNum2=num2;
        }
        else
        {
            num2d=1/num2d;
            num2=QString::number(num2d);
            num2Size=num2.size();
            num2Lock=1;  //第二个数做了倒数处理要锁定不能改变值
            qDebug()<<"num2:"<<num2;
            isProcessNum2=1;
            sShowNum2.insert(0,"1/(");
            sShowNum2.append(")");
            smallScreenDisplay(2);
            largeScreenDisplay(2);
        }

    }





}

//平方
void MainWindow::squareCalculation()
{
    if(isSetOpreator1==0 && isSetNum1==1)
    {
        isProcessNum1=0;
    }
    //if( num1Size!=0 && isSetNum1==0  &&isSetOpreator1==0)
    if( (isSetOpreator1==0))
    {

        double num1d;
        num1d=num1.toDouble();
        num1d=num1d*num1d;

        num1=QString::number(num1d);
        num1Size=num1.size();
        qDebug()<<"num1:"<<num1;

        isProcessNum1=1;
        qDebug()<<"sShowNum1:"<<sShowNum1;
        sShowNum1.insert(0,"sqr(");

        sShowNum1.append(")");
        qDebug()<<"sShowNum1:"<<sShowNum1;
        smallScreenDisplay(1);
        largeScreenDisplay(1);



    }
    else if(isSetOpreator1==1 )
    {
        if(num2Size==0)
        {
            num2=num1;
            if(num2Size!=0 && num2[0]=='-'){ if(num2.indexOf(".")==-1 &&num2.mid(1,1)=="0"){num2=num2.remove(1,1);}sShowNum2=num2; sShowNum2.insert(0,"("); sShowNum2.append(")");} else {if(num2.indexOf(".")==-1 && num2.mid(0,1)=="0"){num2=num2.remove(1,1);}sShowNum2=num2;}
        }
        double num2d;
        num2d=num2.toDouble();
        num2d=num2d*num2d;
        num2=QString::number(num2d);
        num2Size=num2.size();
        num2Lock=1;  //第二个数做了倒数处理要锁定不能改变值
        qDebug()<<"num2:"<<num2;

        isProcessNum2=1;
        sShowNum2.insert(0,"sqr(");
        sShowNum2.append(")");
        smallScreenDisplay(2);
        largeScreenDisplay(2);

    }

}

//开根
void MainWindow::openRootCalculation()
{
    if(isSetOpreator1==0 && isSetNum1==1)
    {
        isProcessNum1=0;
    }
    if( (isSetOpreator1==0))
    {

        if(num1Size==0)
        {
             num1="0";
        }
        double num1d;
        num1d=num1.toDouble();
        if(num1d<0)
        {
              reportError("无效输入");
              sShowNum1.insert(0,"√(");
              sShowNum1.append(")");
               smallScreenDisplay(1);
              playError(1);
              num1="";
              num2="";
              operator1="";
              num1Size=0;
              num2Size=0;
              isSetOpreator1=0;
              isSetNum1=0;
              num2Lock=0;
              isProcessNum1=0;
              isProcessNum2=0;
              tmpNum2="";
              tmpOPerator1="";
          //    vInputStr[0]=num1;
          //    vInputStr[1]=operator1;
          //    vInputStr[2]=num2;
              sShowNum1=num1;
              sShowNum2=num2;
        }
        else
        {

            num1d=num1.toDouble();
            num1d=sqrt(num1d);
            num1=QString::number(num1d);
            num1Size=num1.size();
            qDebug()<<"num1:"<<num1;

            isProcessNum1=1;
            sShowNum1.insert(0,"√(");
            sShowNum1.append(")");
            smallScreenDisplay(1);
            largeScreenDisplay(1);

        }

    }
    else if(isSetOpreator1==1 )
    {

        if(num2Size==0)
        {
            num2=num1;
            if(num2Size!=0 && num2[0]=='-'){ if(num2.indexOf(".")==-1 &&num2.mid(1,1)=="0"){num2=num2.remove(1,1);}sShowNum2=num2; sShowNum2.insert(0,"("); sShowNum2.append(")");} else {if(num2.indexOf(".")==-1 && num2.mid(0,1)=="0"){num2=num2.remove(1,1);}sShowNum2=num2;}
        }
        double num2d;
        num2d=num2.toDouble();
        if(num2d<0)
        {
              reportError("无效输入");
              sShowNum2.insert(0,"√(");
              sShowNum2.append(")");
              smallScreenDisplay(2);
              playError(1);

              num1="";
              num2="";
              operator1="";
              num1Size=0;
              num2Size=0;
              isSetOpreator1=0;
              isSetNum1=0;
              num2Lock=0;
              isProcessNum1=0;
              isProcessNum2=0;
              tmpNum2="";
              tmpOPerator1="";
          //    vInputStr[0]=num1;
          //    vInputStr[1]=operator1;
          //    vInputStr[2]=num2;
              sShowNum1=num1;
              sShowNum2=num2;
              
        }
        else
        {
            num2d=sqrt(num2d);
            num2=QString::number(num2d);
            num2Size=num2.size();
            num2Lock=1;  //第二个数做了倒数处理要锁定不能改变值
            qDebug()<<"num2:"<<num2;

            isProcessNum2=1;
            sShowNum2.insert(0,"√(");
            sShowNum2.append(")");
            smallScreenDisplay(2);
            largeScreenDisplay(2);
        }

    }

}

//取反
void MainWindow::reverseCalculations()
{


   if( (isSetOpreator1==0))
    {
        if(num1[0]!='-' && num1!="0")
        {
               num1=num1.insert(0,'-');
               num1Size+=1;
               largeScreenDisplay(1);
        }
        else
        {
             num1=num1.remove(0,1);
             num1Size-=1;
             largeScreenDisplay(1);
        }
        qDebug()<<"num1:"<<num1;


        if(isProcessNum1==1)
        {

            sShowNum1.insert(0,"negate(");
            sShowNum1.append(")");
            smallScreenDisplay(1);
            largeScreenDisplay(1);
        }
        else
        {
            qDebug()<<"llll"<<num1;
            qDebug()<<"1112"<<num2;
            sShowNum1=num1;
        }


    }
    else if(isSetOpreator1==1)
    {
        if(num2Size==0)
        {
            num2=num1;
            if(num2Size!=0 && num2[0]=='-'){ if(num2.indexOf(".")==-1 &&num2.mid(1,1)=="0"){num2=num2.remove(1,1);}sShowNum2=num2; sShowNum2.insert(0,"("); sShowNum2.append(")");} else {if(num2.indexOf(".")==-1 && num2.mid(0,1)=="0"){num2=num2.remove(1,1);}sShowNum2=num2;}
        }
        if(num2[0]!='-')
        {
               num2.insert(0,'-');
               num2Size+=1;
               if(num2Size!=0 && num2[0]=='-'){ if(num2.indexOf(".")==-1 &&num2.mid(1,1)=="0"){num2=num2.remove(1,1);}sShowNum2=num2; sShowNum2.insert(0,"("); sShowNum2.append(")");} else {if(num2.indexOf(".")==-1 && num2.mid(0,1)=="0"){num2=num2.remove(1,1);}sShowNum2=num2;}

        }
        else
        {
             num2.remove(0,1);
             num2Size-=1;
        }
        qDebug()<<"num2:"<<num2;
        largeScreenDisplay(2);
        if(isProcessNum2==1)
        {
            sShowNum2.insert(0,"negate(");
            sShowNum2.append(")");
            smallScreenDisplay(2);
            largeScreenDisplay(2);
        }
        else
        {

        }
    }

}

//%百分号处理
void MainWindow::percentageCalculation()
{

    if(isSetOpreator1==1 )
    {
        if(num2Size==0)
        {
            num2=num1;
            if(num2Size!=0 && num2[0]=='-'){ if(num2.indexOf(".")==-1 &&num2.mid(1,1)=="0"){num2=num2.remove(1,1);}sShowNum2=num2; sShowNum2.insert(0,"("); sShowNum2.append(")");} else {if(num2.indexOf(".")==-1 && num2.mid(0,1)=="0"){num2=num2.remove(1,1);}sShowNum2=num2;}
        }
        double num2d;
        num2d=num2.toDouble();
        num2d=num2d/100.0;
        num2=QString::number(num2d);
        num2Size=num2.size();
        num2Lock=1;  //第二个数做了倒数处理要锁定不能改变值
        qDebug()<<"num2:"<<num2;
        if(num2Size!=0 && num2[0]=='-'){ if(num2.indexOf(".")==-1 &&num2.mid(1,1)=="0"){num2=num2.remove(1,1);}sShowNum2=num2; sShowNum2.insert(0,"("); sShowNum2.append(")");} else {if(num2.indexOf(".")==-1 && num2.mid(0,1)=="0"){num2=num2.remove(1,1);}sShowNum2=num2;}
        smallScreenDisplay(2);
        largeScreenDisplay(2);

    }
}




//C操作
void MainWindow::clearAction()
{
    num1="";
    num2="";
    operator1="";
    num1Size=0;
    num2Size=0;
    isSetOpreator1=0;
    isSetNum1=0;
    num2Lock=0;
    isProcessNum1=0;
    isProcessNum2=0;
    tmpNum2="";
    tmpOPerator1="";
//    vInputStr[0]=num1;
//    vInputStr[1]=operator1;
//    vInputStr[2]=num2;
    sShowNum1=num1;
    sShowNum2=num2;
    smallScreenDisplay(1);
    largeScreenDisplay(1);
    frontResult="";


}

//CE 操作
void MainWindow::clearEntryAction()
{

    if( isSetOpreator1==0)
    {
        num1="";
        num1Size=0;
        largeScreenDisplay(1);
    }
    else if(isSetOpreator1==1)
    {
        num2="";
        num2Size=0;
        num2Lock=0;
        largeScreenDisplay(2);
    }
}

//Del操作
void MainWindow::deletAction()
{
    if(isSetNum1==0 && isSetOpreator1==0 && num1Size!=0)
    {
        num1.remove(num1Size-1,1);
        num1Size-=1;
        largeScreenDisplay(1);
        qDebug()<<"num1:"<<num1;
    }
    else if(isSetOpreator1==1 && num2Size!=0)
    {
        num2.remove(num2Size-1,1);
        num2Size-=1;
        largeScreenDisplay(2);
        qDebug()<<"num2:"<<num2;
    }
}

//小屏显示    num:1 为过程显示  num:2 第二数字进行过处理    num:0   为结果显示
void MainWindow::smallScreenDisplay(int num)
{
    QString showopt;
    if(operator1=="/")
    {
        showopt ="÷";
    }
    else if(operator1=="*")
    {
        showopt="×";
    }
    else
    {
        showopt=operator1;
    }

    if(sShowNum2.mid(sShowNum2.size()-1,1)==".")
    {
        sShowNum2=sShowNum2.mid(0,sShowNum2.size()-1);
    }
    if(sShowNum1.size()>=1 && sShowNum1[sShowNum1.size()-1]=='.')
    {
        sShowNum1.remove(sShowNum1.size()-1,1);
    }
    if(sShowNum2.size()>=1 && sShowNum2[sShowNum2.size()-1]=='.')
    {
        sShowNum2.remove(sShowNum2.size()-1,1);
    }

    QString displayStr;
    if(num==1)
    {
        displayStr=sShowNum1+showopt;
        qDebug()<<"small"<<sShowNum1<<showopt;
    }
    else if(num==2)
    {
        displayStr=sShowNum1+showopt+sShowNum2;
        qDebug()<<"small"<<sShowNum1<<showopt<<sShowNum2;
    }
    else if(num==0)
    {
        displayStr=sShowNum1+showopt+sShowNum2+"=";
        qDebug()<<"small"<<sShowNum1<<showopt<<sShowNum2<<"=";
    }
     ui->label->setText(displayStr);
}

//大屏幕显示
void MainWindow::largeScreenDisplay(int num)
{  
    QString displayStr;
    if(num==1)
    {
        if(num1Size==0)
        {
            displayStr="0";
            qDebug()<<"big:"<<"0";
        }
        else
        {
            displayStr=num1;
             qDebug()<<"big:"<<num1;
        }

    }
    else if(num==2)
    {
        if(num2Size==0)
        {
            displayStr="0";
            qDebug()<<"big:"<<"0";
        }
        else
        {
            displayStr=num2;
             qDebug()<<"big:"<<num2;
        }
    }
    else if(num==0)
    {
        displayStr=frontResult;
        qDebug()<<"big:"<<frontResult;
    }
     ui->label_2->setText(displayStr);
}

//大屏幕报错 0/0：

//x/0：除数不能为0   开根负数：无效输入
void MainWindow::reportError(QString error)
{

    qDebug()<<"big:"<<error;
     ui->label_2->setText(error);
}


//写历史记录
void MainWindow::writeRecords()
{
    QFile *file = new QFile(FILEPATH);
    //QFile file(FILEPATH);
    if(sShowNum2.mid(sShowNum2.size()-1,1)==".")
    {
        sShowNum2=sShowNum2.mid(0,sShowNum2.size()-1);
    }
    if(!file->open(QIODevice::WriteOnly |QIODevice::Append))
    {
        qDebug()<<"File opening failed";

    }
    else
    {
        QString recordStr;
        QByteArray br;
        QString showopt;
        if(operator1=="/")
        {
            showopt ="÷";
        }
        else if(operator1=="*")
        {
            showopt="×";
        }
        else
        {
            showopt=operator1;
        }
        recordStr=sShowNum1+showopt+sShowNum2+"="+frontResult;
        recordStr=recordStr.toUtf8();
        QTextStream txtOutput(file);
        txtOutput.setCodec("UTF-8");
        txtOutput<<recordStr<<endl;

        qDebug()<<recordStr;
        qDebug()<<"write ok";
    }



    file->close();

}

//读取显示历史记录
void MainWindow::readRecords()
{

    //阻塞窗口
    fs->setWindowModality(Qt::ApplicationModal);
    fs->showHistory();
    fs->show();


}

//清除历史记录
void MainWindow::clearRecords()
{
    QFile *file=new QFile(FILEPATH);
    file->open(QIODevice::WriteOnly | QIODevice::Truncate);
    file->close();

}



 //按钮链接槽函数
 void MainWindow::allbtnconnect()
 {

     //将按键0~9和小数点信号和槽函数链接
     connect(ui->btn0,&QPushButton::clicked,[=](){
         interruptTheResulreading();
         playSound('0');
         inputNum('0');

     });
     connect(ui->btn1,&QPushButton::clicked,[=](){
         interruptTheResulreading();
         inputNum('1');
         playSound('1');


     });
     connect(ui->btn2,&QPushButton::clicked,[=](){

         interruptTheResulreading();
         inputNum('2');
         playSound('2');

     });
     connect(ui->btn3,&QPushButton::clicked,[=](){

          interruptTheResulreading();
          inputNum('3');
         playSound('3');

     });
     connect(ui->btn4,&QPushButton::clicked,[=](){
       interruptTheResulreading();
       playSound('4');
         inputNum('4');

     });
     connect(ui->btn5,&QPushButton::clicked,[=](){
        playSound('5');
         inputNum('5');
         interruptTheResulreading();
     });
     connect(ui->btn6,&QPushButton::clicked,[=](){
       interruptTheResulreading();
       playSound('6');
         inputNum('6');

     });
     connect(ui->btn7,&QPushButton::clicked,[=](){
        interruptTheResulreading();
        playSound('7');
         inputNum('7');
         ;
     });

     connect(ui->btn8,&QPushButton::clicked,[=](){
        interruptTheResulreading();
        playSound('8');
         inputNum('8');

     });
     connect(ui->btn9,&QPushButton::clicked,[=](){
        interruptTheResulreading();
        playSound('9');
         inputNum('9');

     });
     connect(ui->btnPoint,&QPushButton::clicked,[=](){
        interruptTheResulreading();
        playSound('.');
         //小数点为.
         inputNum('.');


     });


     //将运算符点击信号和槽函数输入运算符相连
     connect(ui->btnAdd,&QPushButton::clicked,[=](){
        interruptTheResulreading();
        playSound('+');
         inputOperator('+');


     });
     connect(ui->btnSub,&QPushButton::clicked,[=](){
        interruptTheResulreading();
        playSound('-');
         inputOperator('-');


     });
     connect(ui->btnC,&QPushButton::clicked,[=](){
        interruptTheResulreading();
        playSound('C');
         inputOperator('C');


     });
     connect(ui->btnCE,&QPushButton::clicked,[=](){
        interruptTheResulreading();
        playSound('E');
         inputOperator('E');


     });
     connect(ui->btnDel,&QPushButton::clicked,[=](){
        interruptTheResulreading();
        playSound('D');
         inputOperator('D');


     });
     connect(ui->btnMul,&QPushButton::clicked,[=](){
        interruptTheResulreading();
        playSound('*');
         inputOperator('*');


     });
     connect(ui->btnDiv,&QPushButton::clicked,[=](){
        interruptTheResulreading();
        playSound('/');
         inputOperator('/');


     });
     connect(ui->btnEqual,&QPushButton::clicked,[=](){
        interruptTheResulreading();
        //playSound('=');
         inputOperator('=');
         //playTheWholeNumber("-1.9e-5");
         //

     });
     connect(ui->btnNegate,&QPushButton::clicked,[=](){

         //取反
         interruptTheResulreading();
         inputOperator('N');
         playSound('N');


     });
     connect(ui->btnRec,&QPushButton::clicked,[=](){

         //1/x倒数
         interruptTheResulreading();
         playSound('R');
         inputOperator('R');



     });
     connect(ui->btnSqrt,&QPushButton::clicked,[=](){
        interruptTheResulreading();
         playSound('S');
         //开根

         inputOperator('S');

     });
     connect(ui->btnSquare,&QPushButton::clicked,[=](){
        interruptTheResulreading();
         playSound('q');
         //平方
         inputOperator('2');


     });
     connect(ui->btnPercent,&QPushButton::clicked,[=](){
        interruptTheResulreading();
         playSound('%');
         //百分号   1*50%=
         inputOperator('%');



     });

     connect(ui->btnHistory,&QPushButton::clicked,[=](){

        readRecords();

     });

     connect(ui->btn_color,&QPushButton::clicked,[=](){


        //设置背景颜色 颜色对话框
        QPalette pal;
        QColor color =QColorDialog::getColor(QColor(255,0,0));
        pal.setColor(QPalette::Background,color);
        this->setPalette(pal);
        this->fs->setPalette(pal);
        qDebug()<<"r="<<color.red()<<"g="<<color.green()<<color.blue();

     });



 }



 //键盘按下事件
void MainWindow::keyPressEvent(QKeyEvent *event)
 {
    if(event->key()==Qt::Key_0)
    {
        if(event->isAutoRepeat())
        {
            return ;
        }
        emit ui->btn0->clicked();
        return;
    }
    if(event->key()==Qt::Key_1)
    {
        if(event->isAutoRepeat())
        {
            return ;
        }
        emit ui->btn1->clicked();
        return;
    }
    if(event->key()==Qt::Key_2)
    {
        if(event->isAutoRepeat())
        {
            return ;
        }
        emit ui->btn2->clicked();
        return;
    }
    if(event->key()==Qt::Key_3)
    {
        if(event->isAutoRepeat())
        {
            return ;
        }
        emit ui->btn3->clicked();
        return;
    }
    if(event->key()==Qt::Key_4)
    {
        if(event->isAutoRepeat())
        {
            return ;
        }
        emit ui->btn4->clicked();
        return;
    }
    if(event->key()==Qt::Key_5)
    {
        if(event->isAutoRepeat())
        {
            return ;
        }
        emit ui->btn5->clicked();
        return;
    }
    if(event->key()==Qt::Key_6)
    {
        if(event->isAutoRepeat())
        {
            return ;
        }
        emit ui->btn6->clicked();
        return;
    }
    if(event->key()==Qt::Key_7)
    {
        if(event->isAutoRepeat())
        {
            return ;
        }
        emit ui->btn7->clicked();
        return;
    }
    if(event->key()==Qt::Key_8)
    {
        if(event->isAutoRepeat())
        {
            return ;
        }
        emit ui->btn8->clicked();
        return;
    }
    if(event->key()==Qt::Key_9)
    {
        if(event->isAutoRepeat())
        {
            return ;
        }
        emit ui->btn9->clicked();
        return;
    }

    //小数点
    if(event->key()==Qt::Key_Period)
    {
        if(event->isAutoRepeat())
        {
            return ;
        }
        emit ui->btnPoint->clicked();
        return;
    }
    if(event->key()==Qt::Key_Backspace)
    {
        if(event->isAutoRepeat())
        {
            return ;
        }
        emit ui->btnDel->clicked();
        return;
    }
    if(event->key()==Qt::Key_Enter || event->key()==Qt::Key_Return)
    {
        if(event->isAutoRepeat())
        {
            return ;
        }
        emit ui->btnEqual->clicked();
        return;
    }

    if(event->key()==Qt::Key_Plus)
    {
        if(event->isAutoRepeat())
        {
            return ;
        }
        emit ui->btnAdd->clicked();
        return;
    }
    if(event->key()==Qt::Key_Minus)
    {
        if(event->isAutoRepeat())
        {
            return ;
        }
        emit ui->btnSub->clicked();
        return;
    }
    if(event->key()==Qt::Key_Asterisk)
    {
        if(event->isAutoRepeat())
        {
            return ;
        }
        emit ui->btnMul->clicked();
        return;
    }
    if(event->key()==Qt::Key_Minus)
    {
        if(event->isAutoRepeat())
        {
            return ;
        }
        emit ui->btnSub->clicked();
        return;
    }
    if(event->key()==Qt::Key_Slash)
    {
        if(event->isAutoRepeat())
        {
            return ;
        }
        emit ui->btnDiv->clicked();
        return;
    }
    if(event->key()==Qt::Key_H)
    {
        if(event->isAutoRepeat())
        {
            return ;
        }
        emit ui->btnHistory->clicked();
        return;
    }




 }


//播放声音
void MainWindow::playSound(char sd)
{
    QString soundPath=getSoundPath(sd);
    QSound::play(soundPath);
}


//当其他按键按下时打断结果的朗读
void MainWindow::interruptTheResulreading()
{
    m_lstMediaFile.clear();
    myPlayer->stop();
}

 fileshow.h

#ifndef FILESHOW_H
#define FILESHOW_H
#include <QWidget>


//历史记录页面
namespace Ui {
class FileShow;
}

class FileShow : public QWidget
{
    Q_OBJECT

public:
    //更新历史记录显示
    void showHistory();

    explicit FileShow(QWidget *parent = 0);
    Ui::FileShow *ui;
    ~FileShow();


private:

};

#endif // FILESHOW_H

fileshow.cpp

#ifndef FILESHOW_H
#define FILESHOW_H
#include <QWidget>


//历史记录页面
namespace Ui {
class FileShow;
}

class FileShow : public QWidget
{
    Q_OBJECT

public:
    //更新历史记录显示
    void showHistory();

    explicit FileShow(QWidget *parent = 0);
    Ui::FileShow *ui;
    ~FileShow();


private:

};

#endif // FILESHOW_H

sound.h

#ifndef SOUND_H
#define SOUND_H
#include<QString>
#include <QCoreApplication>
#include <QFileInfo>
#include <QMediaPlayer>
QString getSoundPath(char sd);


//获取声音地址
QString getSoundPath(char sd);
//状态改变后的动作槽函数
void sltStateChanged(QMediaPlayer::State state);

//播放列表声音
void playMedia();



//播放完整数字（结果播报） 最大读到千亿  0000|0000|0000.
void playTheWholeNumber(QString num);

//传入一个小于1万的数，播放声音添加万以内的读法  3 2 1
void addReadingWithinTenThousand(QString strnum,QList<QString> &m_lstMediaFile);

//播放错误信息
//num1 无效输入  2 结果未定义 3除数不能为0
void playError(int num);

//科学计数转化为普通计数     0.003e+02  ->   0.3
void scientificCountingToOrdinaryCount(QString &num);

#endif // SOUND_H

sound.cpp

#ifndef SOUND_CPP
#define SOUND_CPP
#include "sound.h"
#include <QSound>
#include <QDebug>
#include <QThread>
#include <QTime>
#include <QEventLoop>
#include <QMediaPlaylist>
#include <QString>
#include <QCoreApplication>
#include <QFileInfo>
#include <QMediaPlayer>
#include <QCharRef>
#include <typeinfo>
QMediaPlayer *myPlayer;
QList<QString> m_lstMediaFile;


//获取声音地址
QString getSoundPath(char sd)
{
    QString soundPath;

    switch (sd){
    case '0':
        soundPath="./sound/0.wav";
        break;
    case '1':
        soundPath="./sound/1.wav";
        break;
    case '2':
        soundPath="./sound/2.wav";
        break;
    case '3':
        soundPath="./sound/3.wav";
        break;
    case '4':
        soundPath="./sound/4.wav";
        break;
    case '5':
        soundPath="./sound/5.wav";
        break;
    case '6':
        soundPath="./sound/6.wav";
        break;
    case '7':
        soundPath="./sound/7.wav";
        break;
    case '8':
        soundPath="./sound/8.wav";
        break;
    case '9':
        soundPath="./sound/9.wav";
        break;
    case '.':
        soundPath="./sound/point.wav";
        break;
    case '+':
        soundPath="./sound/add.wav";
        break;
    case '*':
        soundPath="./sound/mul.wav";
        break;
    case '/':
        soundPath="./sound/div.wav";
        break;
    case 'S':
        soundPath="./sound/sqrt.wav";
        break;
    case 'q':
        soundPath="./sound/square.wav";
        break;
    case '%':
        soundPath="./sound/percent.wav";
        break;
    case 'N':
        soundPath="./sound/Negate.wav";
        break;
    case 'R':
        soundPath="./sound/Rec.wav";
        break;
    case 'C':
        soundPath="./sound/clear.wav";
        break;
    case 'E':
        soundPath="./sound/ce.wav";
        break;
    case 'D':
        soundPath="./sound/del.wav";
        break;
    case '=':
        soundPath="./sound/equal.wav";
        break;
    case '-':
        soundPath="./sound/sub.wav";
        break;
    case 'Q':  //千
        soundPath="./sound/qian.wav";
        break;
    case 'B': //百
        soundPath="./sound/bai.wav";
        break;
    case 'W': //万
        soundPath="./sound/wan.wav";
        break;
    case 's': //十
        soundPath="./sound/shi.wav";
        break;
    case 'Y': //亿
        soundPath="./sound/yi.wav";
        break;
    case 'F': //负
        soundPath="./sound/fu.wav";
        break;
    case 'c':  //数字超过可读范围
        soundPath="./sound/C.wav";
        break;

    }

    //QSound::play(soundPath);
    return soundPath;

}





void playMedia()
{
    if(m_lstMediaFile.size()>0)
    {
        myPlayer->setMedia(QUrl::fromLocalFile( m_lstMediaFile.at(0)));
        myPlayer->play();
        m_lstMediaFile.removeAt(0);
    }
}
void sltStateChanged(QMediaPlayer::State state)
{

    if (state == 0)
    {
        playMedia();
    }
}

//播放完整数字（结果播报） 最大读到千亿  0000|0000|0000.
void playTheWholeNumber(QString num)
{

    m_lstMediaFile.append("./sound/equal.wav");
    //小数点的位置
    int point_pos;
    //小数点前数字的字符串
    QString beforePointNum="";
    QString backPointNum="";
    //不包含符号的小数点之前数的长度
    int noSignBeforeNumSize;

    //strNum3 |strNum2 |strNum1
    //0000|0000|0000
    QString strNum1;
    QString strNum2;
    QString strNum3;
    //整数有及部分 1~3
    int partCount=0;


    //讲科学计数华为标准形式
    scientificCountingToOrdinaryCount(num);
    //读取小数点位置
    point_pos=num.indexOf(".");
    //有小数部分
    if(point_pos!=-1)
    {
        beforePointNum=num.mid(0,point_pos);
        qDebug()<<"beforePointNum"<<beforePointNum;
        backPointNum=num.mid(point_pos+1,num.size()-point_pos-1);
        qDebug()<<"backPointNum"<<backPointNum;
    }
    else
    {
        beforePointNum=num;
        qDebug()<<"beforePointNum"<<beforePointNum;
    }


    //数字读取
    //读个负号
    if(beforePointNum[0]=='-')
    {
        m_lstMediaFile.append(getSoundPath('F'));
        beforePointNum.remove(0,1);
    }


    //整数分为三部分
    //strNum3 |strNum2 |strNum1
    //0000|0000|0000
    noSignBeforeNumSize=beforePointNum.size();
    if(noSignBeforeNumSize>12)
    {

        QSound::play(getSoundPath('c'));
        return;
    }
    else if(noSignBeforeNumSize<=12&& noSignBeforeNumSize>8)
    {
        partCount=3;
        qDebug()<<"before"<<beforePointNum;
        strNum1=beforePointNum.mid(noSignBeforeNumSize-4,4);
        beforePointNum=beforePointNum.remove(noSignBeforeNumSize-4,4);
        strNum2=beforePointNum.mid(noSignBeforeNumSize-4-4,4);
        beforePointNum=beforePointNum.remove(noSignBeforeNumSize-4-4,4);
        strNum3=beforePointNum;
        qDebug()<<strNum3<<"  "<<strNum2<<"   "<<strNum1;
    }
    else if(noSignBeforeNumSize<=8 && noSignBeforeNumSize>4)
    {
        partCount=2;
        strNum1=beforePointNum.mid(noSignBeforeNumSize-4,4);
        beforePointNum=beforePointNum.remove(noSignBeforeNumSize-4,4);
        strNum2=beforePointNum;
    }
    else if(noSignBeforeNumSize<=4)
    {
        partCount=1;
        strNum1=beforePointNum;
    }
    qDebug()<<strNum3<<"  "<<strNum2<<"   "<<strNum1;




    //整数只有0要读出来
    if(partCount==1 && strNum1=="0")
    {
        m_lstMediaFile.append(getSoundPath('0'));
    }

    else if(partCount>=1)
    {
        for(int i=partCount;i>0;i--)
        {
               switch  (i)
               {
               case 3:
                   addReadingWithinTenThousand(strNum3,m_lstMediaFile);
                   m_lstMediaFile.append(getSoundPath('Y'));
                   break;
               case 2:
                   addReadingWithinTenThousand(strNum2,m_lstMediaFile);
                   m_lstMediaFile.append(getSoundPath('W'));
                   break;
               case 1:
                   addReadingWithinTenThousand(strNum1,m_lstMediaFile);
                   break;
               }
        }
    }

    char nc;
    QString soundPath;
    //读取小数部分
    if(backPointNum!="")
    {
        m_lstMediaFile.append(getSoundPath('.'));
    }
    for(int i=0;i<backPointNum.size();i++)
    {
        nc=backPointNum.at(i).toLatin1();
        soundPath=getSoundPath(nc);
        m_lstMediaFile.append(soundPath);
    }







        m_lstMediaFile.append("./sound/el.wav");

//        for(int i=0;i<m_lstMediaFile.size();i++)
//        {
//            qDebug()<<m_lstMediaFile[i];
//        }

        playMedia();














}


//添加万以内的读法  3 2 1
void addReadingWithinTenThousand(QString strnum,QList<QString> &m_lstMediaFile)
{
    QString soundPath;
    QString str_0="0000";
    if(strnum.size()!=4)
    {
        strnum=strnum.insert(0,str_0.mid(0,4-strnum.size()));
    }

    char num[4];
    for(int i=0;i<4;i++)
    {
        num[i]=strnum.at(i).toLatin1();
    }

    for(int i=0;i<4;i++)
    {
        if(num[i]!='0')
        {

            soundPath=getSoundPath(num[i]);
            m_lstMediaFile.append(soundPath);
            switch (i)
            {
            case 0:
                //千
                m_lstMediaFile.append(getSoundPath('Q'));
                break;
             case 1:
                m_lstMediaFile.append(getSoundPath('B'));
                break;

            case 2:
               m_lstMediaFile.append(getSoundPath('s'));
               break;
            }
            //
            if((i==0 && num[1]=='0' &&(num[2]!='0' || num[3]!='0') ) ||(i==1 && num[2]=='0' && num[3]!='0') )
            {
                m_lstMediaFile.append(getSoundPath('0'));
            }
        }
    }



}

//num1 无效输入  2 结果未定义 3除数不能为0
void playError(int num)
{
    switch(num)
    {
    case 1:

        //按钮链接
        m_lstMediaFile.append("./sound/e1.wav");
        break;
    case 2:
        m_lstMediaFile.append("./sound/e2.wav");
        break;
    case 3:
        m_lstMediaFile.append("./sound/e3.wav");
        break;
        
    }

    //打印播放声音列表
//    for(int i=0;i<m_lstMediaFile.size();i++)
//    {
//        qDebug()<<m_lstMediaFile[i];
//    }

    playMedia();
    
}



//科学计数转化为普通计数     0.003e+02  ->   0.3
void scientificCountingToOrdinaryCount(QString &num)
{

    //e的位置
    int e_pos;
    int movePointSize=0;  //需要移动小数点的位数
    int pointBackCharSize=0;  //小数点后非0数字的个数
    QString str_0="0000000000000000";  //用来补0
    e_pos=num.indexOf("e");


    //若是科学计数法要处理,不是科学计数法则不需要处理
    if(e_pos!=-1)
    {
        //读取移动位数
        movePointSize=(num.mid(e_pos+2,2)).toInt();

        //判断e后面的符号 小数点右移   决定是*10^n  还是*10^(-n)
        if(num[e_pos+1]=='+')
        {
                 //去除科学计数法e后的数字
                 num=num.mid(0,e_pos);


                //移除小数点
                if(num[0]=='-')
                {
                    //小数点后有效数字的信息
                    pointBackCharSize=num.size()-3;
                    num=num.remove(2,1);
                    //小数点多余
                    if(movePointSize>pointBackCharSize)
                    {
                        num=num.insert(num.size(),str_0.mid(0,movePointSize-pointBackCharSize));

                    }
                    //如果需要小数点
                    if(movePointSize<pointBackCharSize)
                    {
                        num=num.insert(2+movePointSize,".");
                    }
                    while(num[1]=='0')
                    {
                        num.remove(1,1);
                    }
                    if(num[1]=='.')
                    {
                        num.insert(1,"0");
                    }
                }
                else
                {
                    //小数点后有效数字的信息
                    pointBackCharSize=num.size()-2;
                    num=num.remove(1,1);
                    //小数点多余
                    if(movePointSize>pointBackCharSize)
                    {
                        num=num.insert(num.size(),str_0.mid(0,movePointSize-pointBackCharSize));
                    }
                    //如果需要小数点
                    if(movePointSize<pointBackCharSize)
                    {
                        num=num.insert(1+movePointSize,".");
                    }
                    //去0操作
                    while(num[0]=='0')
                    {
                        num.remove(0,1);
                    }
                    if(num[0]=='.')
                    {
                        num.insert(0,"0");
                    }

                }
        }


        //小数点左移情况   1.333333e-05
        else if(num[e_pos+1]=='-')
        {

            //去除科学计数法e后的数字
            num=num.mid(0,e_pos);
            //移除小数点
            if(num[0]=='-')
            {
                num=num.remove(2,1);
                //前面补0操作
                num.insert(1,str_0.mid(0,movePointSize));
                //写入小数点
                num.insert(2,".");
            }
            else
            {
                num=num.remove(1,1);
                //前面补0操作
                num.insert(0,str_0.mid(0,movePointSize));
                //写入小数点
                num.insert(1,".");

            }
        }
        qDebug()<<"num"<<num;
    }


}


#endif // SOUND_CPP

main.c

#include "mainwindow.h"
#include <QApplication>

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    MainWindow w;
    w.show();

    return a.exec();
}

showfile.ui

mainwindow.ui