[Qt5] small software with 5 people randomly selected from the bid evaluation expert base

1. Software screenshot

It is also applicable to other places where something needs to be randomly selected , For example, choose students randomly 、 Lucky draw or something .

After the release of exe File and source code download address ： Bid evaluation experts select small software .zip- E-government document resources -CSDN download

among myexe Folders can be copied to arbitrarily PC On , Double click on SelectName.exe You can use the software , The entered personnel name will be saved to the current folder people.txt in .

2. Design and implementation

development environment ：Windows 10, Qt 5.14.2.

Programming to realize ： There is no difficulty , Namely QList Random elements inside are a little difficult , I refer to This article Code for .

2.1 Screenshot of project structure

2.2 Main code

mainwindow.cpp

#include "mainwindow.h"
#include "ui_mainwindow.h"

MainWindow::MainWindow(QWidget *parent)
    : QMainWindow(parent)
    , ui(new Ui::MainWindow)
{
    ui->setupUi(this);
    this->txtName = "people.txt";

    // Create a file to save people's names 
    QFile file(this->txtName);
    if(!file.exists())
    {
        file.open(QIODevice::WriteOnly);
        file.close();
    }
}

MainWindow::~MainWindow()
{
    delete ui;
}

// Out of order arrangement of array elements 
QList<QString> MainWindow::LuanXu(QList<QString> list)
{
    int length = list.size();

    for(int i=0;i<length;i++)
    {
        QTime t = QTime::currentTime();
        qsrand(t.msec()+t.second()*1000);
        int r = i+qrand()%(length-i);
        QString temp=list[i];
        list[i]=list[r];
        list[r]=temp;
    }
    return list;
}

// Click on   label 
void MainWindow::on_tabWidget_tabBarClicked(int index)
{


    QFile file(this->txtName);

    // Show all people 
    if(index == 1){

        file.open(QIODevice::ReadOnly | QIODevice::Text);

        QTextStream in(&file);
        ui->textBrowser->setText(in.readAll());
         file.close();
    }
}

// Entry personnel   Save button 
void MainWindow::on_pushButton_2_clicked()
{
    QString pname = ui->nameInput->text();

    QFile file(this->txtName);
    // Read people.txt, If not, create 
    if(!file.exists())
    {
        file.open(QIODevice::WriteOnly);
        file.close();
    }else{
        // File exists 
        file.open(QIODevice::WriteOnly | QIODevice::Append | QIODevice::Text);
        QTextStream stream(&file);
        stream<<pname<<"\n";
        file.close();

        QMessageBox::information(NULL, " Tips ", " Saved successfully ");
        ui->nameInput->clear();
        this->on_tabWidget_tabBarClicked(1);     // Refresh the display of all personnel 
    }
}

// Random selection of personnel 
void MainWindow::on_pushButton_clicked()
{
    // Read the file 
    QFile file(this->txtName);
    file.open(QIODevice::ReadOnly | QIODevice::Text);

    QList<QString> oraList;

    QTextStream in(&file);
    QString line = in.readLine();
    while (!line.isNull())
     {
        oraList.append(line);
        line = in.readLine();
     }
     file.close();

     if(oraList.size()<9){
        QMessageBox::information(NULL, " Tips ", " understaffed 9 name , Please enter the person first ");
     }else{
         // Random selection 
         QList<QString> list = LuanXu(oraList);
         QString rstName = list[0]+"  "+list[1]+"  "+list[2]+"  "+list[3]+"  "+list[4];
         QString secName = list[5]+"  "+list[6]+"  "+list[7]+"  "+list[8];

         ui->lineEdit->setText(rstName);
         ui->lineEdit_2->setText(secName);
     }
}

mainwindows.h

#ifndef MAINWINDOW_H
#define MAINWINDOW_H

#include <QMainWindow>
#include <QDebug>
#include <QMessageBox>
#include <QFile>
#include <QList>
#include <QTime>

QT_BEGIN_NAMESPACE
namespace Ui { class MainWindow; }
QT_END_NAMESPACE

class MainWindow : public QMainWindow
{
    Q_OBJECT

public:
    MainWindow(QWidget *parent = nullptr);
    QList<QString> LuanXu(QList<QString> list);
    ~MainWindow();

private slots:
    void on_tabWidget_tabBarClicked(int index);

    void on_pushButton_2_clicked();

    void on_pushButton_clicked();

private:
    Ui::MainWindow *ui;
    QString txtName;
};
#endif // MAINWINDOW_H