title: INQUIRE to find files with certain extension in Fortran
body: <p>My problem is that I want to inquire for an unknown filename in Fortran by using the extension of the file. </p>
  
  <p>Example: a folder has a file with an extension "*.cel", the extension is always the same but the filename can be different because is given by the end-users. I want to detect whether any *.cel exists in the folder and get the name of the file.</p>