variable arguments in C

Its very simple. You need to be using the va_ functions

Code:

int my_printf( char *fmt, ... )
{
  va_list  argptr;			/* Argument list pointer	*/
  char str[140];			/* Buffer to build sting into	*/
  int cnt;				/* Result of SPRINTF for return */

  va_start( argptr, format );		/* Initialize va_ functions	*/
  cnt = vsprintf( str, fmt, argptr );	/* prints string to buffer	*/

  va_end( argptr );			/* Close va_ functions		*/
  return( cnt );			/* Return the conversion count	*/

}