Strange initial empty space writing data into a file in c++ -

I am facing a strange problem with my application, and although I have tried many solutions, someone I have not even solved my problem.

My C ++ application generates a set of files with custom data. So far, the code works fine, and the file is generated correctly, the first one Except for the expected format of the files is:

  @header @ line1e1, line1e2, line1e3 line2e1, line2e2, line1e3  

However, I have seen a strange spaces (and only the first one) on the first line of the first generated file:

  @headers @ line1e 1 , Line 1A2, Line 1E3 Line2E1, Line2A2, Line1E3  

Since the code is the same for all the files, I am thinking that this Wrong, but so far I am unable to locate the root cause of my problem.

The following is a simplified version of my code:

  / * variable * / std :: ofstream fil; Std :: stringstream ss; s. Precision (10); Ss.width (10); Ss.setf (iOS :: Fixed); {Sprintf (FilNam, "% i-ExportFile.txt", Inx) for (Inte Inks = 0; Inks & lt; MaxInx; Inx ++); Fil.open (std :: string (FilNam). C_str (), std :: ofstream :: out); SavSta = Fil.is_open (); If (surveyor) {SS & lt; & Lt; "@Hedder" & lt; & Lt; "\ N"; SS & lt; & Lt; "@MetricsName:" & lt; & Lt; MTCAnames & lt; & Lt; "\ N"; SS & lt; & Lt; / * Matrix data goes here * / & lt; & Lt; "\ N"; File & lt; & Lt; Ss.rdbuf (); Ss.str (std :: string ()); Ss.clear (); } Fil.close (); }  

Coming from:

  Ss .width (10); 
 
 
 
 
 
 
 
 If the standard width of the representation is less than the breadth of the field, then the presentation is padded with fill letters 
  
 Just remove it and you'll be fine.