备份目录到指定目录，qt代码实现

以下是备份目录到指定目录的Qt代码实现：

#include <QCoreApplication>
#include <QDir>
#include <QDebug>

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

    QString srcDir = "/path/to/source/directory/";
    QString destDir = "/path/to/destination/directory/";

    QDir dir;
    if (!dir.exists(destDir)) {
        if (!dir.mkpath(destDir)) {
            qDebug() << "Failed to create destination directory!";
            return 1;
        }
    }

    QStringList fileList = dir.entryList(QDir::Files | QDir::NoDotAndDotDot);
    foreach (QString file, fileList) {
        QString srcFilePath = srcDir + file;
        QString destFilePath = destDir + file;
        if (!QFile::copy(srcFilePath, destFilePath)) {
            qDebug() << "Failed to copy file " << srcFilePath << " to " << destFilePath;
            return 1;
        }
    }

    qDebug() << "Backup completed successfully!";
    return 0;
}

请注意，这段代码只是一个示例，需要根据具体情况进行修改和完善。