qt - Quickly convert raw data to hex string in c++ -

I am reading data from a file and trying to display raw data as 2 digit hex string .

I am using the QT framework, especially QEASTEdit.

I have applied a bunch of different methods and have almost completed what I want to do, though there are some unexpected errors in it.

1) Read in the data:

  ifstream file (file path, ios :: in | ios :: binary | ios :: eaten); If (file.is_open ()) {size = file.tellg (); Memblock = new four [size + 1]; File.seekg (0, IOS :: bck); File.read (memblock, size); File.close (); }   
 2) Create a single castormon that will be used (because QFextAdit requires a Caststring):  
  Qestring;   
 3) Loop through the array by adding each sorted character of the Qestring S.  
  int count = 0; For (i = 0; i   
 Now it works fine, except that it reaches a character  FF , it seems that  FFFFFFFFFFFFFFFF   
 So my main questions are:  
 
  Why only 'FF' characters appear as'FFFFFFFFFFFF '?  
  There is a way to convert four data to 16 data-based without using the STString :: number    
 I want this implementation to be as fast as possible, so if Springff can work, please tell me, because I think that the questioning may be: The number is sharp.   
 
 
  QString  can not be used for binary data instead  QByteArray  should be used. It can be easily made with a  char *  buffer and it can be easily converted to hex string using  toHex .  
  QByteArray array (memblock, size); TextEdit-> SetText (QString (array.toHex ()));