VMS Help CC, Run-time functions, fprintf, Conversion Specifier  *Conan The Librarian (sorry for the slow response - running on an old VAX)

  d, i     Converts an int argument to signed decimal format.

  o        Converts an unsigned int argument to unsigned octal
           format.

  u        Converts an unsigned int argument to unsigned decimal
           format (giving a number in the range 0 to 4,294,967,295).

  x, X     Converts an unsigned int argument to unsigned hexadecimal
           format (with or without a leading 0x).  The letters
           'abcdef' are used for the x conversion; the letters
           'ABCDEF' are used for the X conversion.

  f        Converts a float or double argument to the format
           [-]mmm.nnnnnn.  The number of n's is equal to the
           precision specification.  If no precision is specified,
           the default is 6.

           If the precision is 0 and the # flag is specified, the
           decimal point appears but no n's appear.  If the precision
           is 0 and the # flag is not specified, the decimal point
           also does not appear.  If a decimal point appears, at
           least one digit appears before it.  The value is rounded
           to the appropriate number of digits.

  e, E     Converts a float or double argument to the format
           [-]m.nnnnnnE[+|-]xx.  The number of n's is specified by
           the precision.  If no precision is specified, the default
           is 6.  If the precision is explicitly 0 and the # flag is
           specified, the decimal point appears but no n's appear.
           If the precision is explicitly 0 and the # flag is not
           specified, the decimal point also does not appear.  An 'e'
           is printed for e conversion; an 'E' is printed for E
           conversion.  The exponent always contains at least two
           digits.  If the value is 0, the exponent is 0.

  g, G     Converts a float or double argument to format f or e (or E
           if the G conversion specifier is used), with the precision
           specifying the number of significant digits.  If the
           precision is 0, it is taken as 1.  The format used depends
           on the value of the argument:  format e (or E) is used
           only if the exponent resulting from such a conversion is
           less than -4, or is greater than or equal to the
           precision; otherwise, format f is used.  Trailing zeros
           are suppressed in the fractional portion of the result.  A
           decimal point appears only if it is followed by a digit.

  c        Converts an int argument to an unsigned char, and writes
           the resulting character (null characters are ignored).

  C        Converts a wchar_t argument to an array of bytes
           representing the character, and writes the resulting
           character.  If the field width is specified and the
           resulting character occupies fewer bytes than the field
           width, it will be padded to the given width with space
           characters.  If the precision is specified, the behavior
           is undefined.

  s        Requires an argument that is a pointer to an array of
           characters of type char.  The argument is used to write
           characters until a null character is encountered or until
           the number of characters indicated by the precision
           specification is exhausted.  If the precision
           specification is 0 or omitted, all characters up to a null
           are output.

  S       Converts an array of wide-character codes to multibyte
           characters, and writes the multibyte characters.  Requires
           an argument that is a pointer to an array of wide
           characters of type wchar_t.  Characters are written until
           a null wide character is encountered or until the number
           of bytes indicated by the precision specification is
           exhausted.  If the precision specification is omitted or
           is greater than the size of the array of converted bytes,
           the array of wide characters must be terminated by a null
           wide character.

  p        Requires an argument that is a pointer to void.  The value
           of the pointer is output as a hexadecimal character.

  n        Requires an argument that is a pointer to an integer.  The
           integer is assigned the number of characters written to
           the output stream so far by this call to the formatted
           output function.  No argument is converted.

  %        Writes out the percent symbol.  No conversion is
           performed.  The complete conversion specification would be
           %%.