find all files with a certain extention + folder control

[tommy]

Hi,

I have 2 questions:

1) I need to find all files in the current folder that have a *.txt extention. Then I want to sequentially open these files and use them.
What is the easiest files to get all filenames with a certain extention?
I would like to obtain these files sequentially - find one, do something, find another, do something etc.

2) How do you detect the presence or absence of folders and how do you create new folders with Qt?

Thanks a lot!

[arturo182]

Here's an example of how to list files in a directory from Qt Documentation (link):

#include <QDir>
 #include <iostream>
 
 int main(int argc, char *argv[])
 {
     QCoreApplication app(argc, argv);
     QDir dir;
     dir.setFilter(QDir::Files | QDir::Hidden | QDir::NoSymLinks);
     dir.setSorting(QDir::Size | QDir::Reversed);
 
     QFileInfoList list = dir.entryInfoList();
     std::cout << "     Bytes Filename" << std::endl;
     for (int i = 0; i < list.size(); ++i) {
         QFileInfo fileInfo = list.at(i);
         std::cout << qPrintable(QString("%1 %2").arg(fileInfo.size(), 10)
                                                 .arg(fileInfo.fileName()));
         std::cout << std::endl;
     }
     return 0;
 }

#include <QDir>
 #include <iostream>

 int main(int argc, char *argv[])
 {
     QCoreApplication app(argc, argv);
     QDir dir;
     dir.setFilter(QDir::Files | QDir::Hidden | QDir::NoSymLinks);
     dir.setSorting(QDir::Size | QDir::Reversed);

     QFileInfoList list = dir.entryInfoList();
     std::cout << "     Bytes Filename" << std::endl;
     for (int i = 0; i < list.size(); ++i) {
         QFileInfo fileInfo = list.at(i);
         std::cout << qPrintable(QString("%1 %2").arg(fileInfo.size(), 10)
                                                 .arg(fileInfo.fileName()));
         std::cout << std::endl;
     }
     return 0;
 }

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Directories can be created with mkdir and to check if they exist use exists.