c++ - qbytearray.at() to unsigned int -

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OK, I have a two-part question about changing an element image for an unsigned integer ( Should a four be correct?).

Here's my code: 

  QByteArray data_read_buffer; Unsigned int data_recieved_size = 0; / * The code below is an external function that populates QbyteArray. Must not be important only to show that I am bytererere Specify a value for / * readFromComPortSafe (data_read_buffer); Data_recieved_size = static_cast & lt; Unsigned int & gt; ((Data_read_buffer.at (2))); OK, so as a result, I'm returning to data_recieved_size "wrong every time in a while" I go to debugger and when I observe the value of data_read_buffer I get this  
 \ 000 \ 003 \ 203 \ 00 <205 .... (ect ect we with umlaut some character)  
 When I observe the value of data_recieved_size I get 4294967171  
 So my first question is  
 Am I doing something wrong with conversion on an unsigned int?  
 My second question is:  
 What does \ 203 represent in qbyteArray? I think I can not understand what I am seeing. It is my understanding that there are four types of Unicode characters ???? I was hoping to be the second element in QByteArray 0x83 or 131. How does it translate \ 203?  
 If someone provides some information on this, I would appreciate it.  
 Thanks   
 
 
  characters  s on your platform basis May be signed or signed, in your case they are signed.  
 When you call  data_read_buffer.at  and the return value is  -125 :  
     
  •   -125  as  char  is  0x83   
  •  this value then inside  static_cast ,  < 0xffffff83   
  •   static_cast  now this value is  unsigned int , which simply copies the bits (well at least Less on two complementary machines).  
  •   0xffffff83  as a  unsigned int  as 4,294,967,171   
     if you enter  unsigned int  And av, except for the sign extension, you should  
      static_cast and lt; Unsigned int & gt; (Static_cast & lt; unsigned char & gt; (data_read_buffer.at (2));

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