Qt生成随机数并保存为txt

    //保存为txt头文件
    #include <QFile>
    #include <QFileDialog>
    #include <QMessageBox>
    #include <QTextStream>
    //随机数头文件
    #include <QtGlobal>
    #include "QTime"
    
    
    //保存随机数
    void MainWindow::on_actionSave_triggered()
    {
    QFileDialog filedlg;
    QString filename = filedlg.getSaveFileName(this,QStringLiteral("打开文件"),"/home",tr("Text file(*.txt)"));
    
    if(filename == "")
        return;
    QFile file(filename);
    if(!file.open((QIODevice::WriteOnly|QIODevice::Text)))
    {
        QMessageBox::warning(this,QStringLiteral("错误"),QStringLiter