Arguments

 

format_spec

   Pointer to a string containing the format specification. The
   format specification consists of characters to be taken literally
   from the input or converted and placed in memory at the specified
   input sources.
 

 . . .

   Optional expressions that are pointers to objects whose resultant
   types correspond to conversion specifications given in the format
   specification.

   If no conversion specifications are given, you can omit these
   input pointers. Otherwise, the function call must have at least
   as many input pointers as there are conversion specifications,
   and the conversion specifications must match the types of the
   input pointers.

   Conversion specifications are matched to input sources in left-
   to-right order. Excess input pointers, if any, are ignored.