Meaning of Width and Precision

  // meaning of width (n)
  // n <= 0: no effect
  // n >  0: on output, sets minimum number of characters output 
  //           (filled with fill char)
  //         on input, sets length of buffer for string extractions
  // Note: reset to 0 after each insertion and extraction
  // Called by manipulator setw (n)

  // meaning of precision (n)
  // n <= 0: default
  // n >  0: if ios::fixed bit is set, determines number of places
  //            displayed after decimal point (forced if ios::showpoint
  //            is also set)
  //         if ios::fixed is not set, determines number of significant
  //            digits displayed
  // Called by manipulator setprecision (n)