====== vsscanf ======
<code c>
int vsscanf(const char *restrict s, const char *restrict format, va_list arg);
</code>

==== description of vsscanf ====
The vscanf(), vfscanf(), and vsscanf() functions shall be equivalent to the scanf(), fscanf(), and sscanf() functions, respectively, except that instead of being called with a variable number of arguments, they are called with an argument list as defined in the <stdarg.h> header. These functions shall not invoke the va_end macro. As these functions invoke the va_arg macro, the value of ap after the return is unspecified.

<code c>
#include <stdio.h>
#include <stdarg.h>

char buffer[80] = "6 7.0 hoopy";

int my_vfscanf(char *fmt, ...)
{
   va_list  argptr;
   int cnt;

   fflush(stdin);

   va_start(argptr, fmt);
   cnt = vsscanf(buffer, fmt, argptr);
   va_end(argptr);

   return(cnt);
}


int main(void)
{
   int inumber;
   float fnumber;
   char string[80];

   my_vfscanf("%d %f %s", &inumber, &fnumber, string);
   printf("%d * %f = %s\n", inumber, fnumber, string);
   return 0;
}
</code>

===== output of vsscanf c example =====
    6 * 7.000000 = hoopy