21.QT二进制文件

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

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);

    QFile file("1.bin");
    file.open(QIODevice::WriteOnly|QIODevice::Truncate);
    QDataStream out(&file);
    QString str1 = "hello";
    QChar ch1 = 'A';
    out << str1<<1234<<ch1;
    file.close();

    file.setFileName("1.bin");
    if(file.open(QFile::ReadOnly))
    {
        QDataStream in(&file);
        QString str;
        int data;
        QChar ch;
        in>>str>>data>>ch;
        qDebug() << str << data << ch;
    }

    MainWindow w;
    w.show();

    return a.exec();
}