
------------------------------------------------------------------------------
6.17 Print formatted data to standard output using variable arguments. <Main>
------------------------------------------------------------------------------
[Name]
vprintf
[Syntax]
#include <stdio.h>
#include <stdarg.h>
int vprintf( const char *format, va_list argptr ) ;
[Arguments]
format Format control string.
argptr Pointer to a list of arguments.
[Return]
Returns number of characters which have been output. (The last null
character is not counted.) If any error, returns negative value.
[Description]
Outputs a series of formatted data to the standard output. Each
arguments are output with conversion according to the format
specification in "format". "argptr" is a pointer of va_list type
defined in stdarg.h. It points a list of arguments to be converted
and output according to format specifications of "format".
Formats of "format" are same as ones of "printf". See "printf" for
details of "format" and "argument".
This function use the library supplied together with the compiler.
For details, see "How to make application program."