Description

   The vscanf function is the same as the scanf function except that
   instead of being called with a variable number of arguments, it
   is called with an argument list (ap) that has been initialized by
   the va_start macro (and possibly with subsequent va_arg calls).

   For more information about format and conversion specifications
   and their corresponding arguments, see the "Understanding Input
   and Output" chapter of the VSI C RTL Reference Manual.

   See also scanf, vfscanf, and vsscanf.