To open and read every file in a directory using the Qt C++ QDir class, you can use the following steps:

    - Create a QDir object for the directory you want to read:

```

QDir directory("/path/to/directory");

```

    - Use the setSorting method to sort the files in alphabetical order, starting from upper letters:

```

directory.setSorting(QDir::Name | QDir::Reversed);

```

    - Use the entryInfoList method to get a list of all the files in the directory:

```

QFileInfoList files = directory.entryInfoList(QDir::Files);


```

    - Loop through the list of files and use the isSymLink method to check if each file is a symbolic link. If it is, skip to the next file:

```

for (const QFileInfo &file : files) {
    if (file.isSymLink()) {
        continue;
    }
    // Open and read the file
}

```

    - To open and read the file, you can use the QFile class. For example:

```

QFile data(file.absoluteFilePath());
if (data.open(QFile::ReadOnly | QFile::Text)) {
    QTextStream stream(&data);
    // Read the contents of the file into a string
    QString contents = stream.readAll();
    // Do something with the contents
}

```

This code should give you a basic idea of how to open and read every file in a directory using the Qt C++ QDir class, while skipping symbolic links and sorting the files in alphabetical order, starting from upper letters.
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