/ ************************************************************************
*
* Purpose: To show ... in action. This operator (?) allows us to pass
* a variable number of parameters to a function, 'printf'
* uses ...
* Author: M.J. Leslie
* Date: 09-Jul-94
*
************************************************************************/
#include <stdio.h>
#include <stdarg.h> /* va_list, va_arg, va_end */
int set(char *item, int, num, ...);
/************************************************************************/
main()
{
char *item="pear";
(set (item,4, "apple", "pear", "banana", "grape") )
? printf ("%s found\n", item) : printf("%s not found\n", item);
}
/************************************************************************/
int set(char *item, int num, ...)
{
va_list ap; /* define 'ap' It acts as a pointer
* to the undefined variables. */
int ok=0;
int inc=0;
va_start(ap, num); /* seed 'ap' */
do {
if ( item == va_arg(ap, char *)) ok=1;
} while ( ok==0 && ++inc < num);
va_end(ap); /* tidy up. */
return (ok);
}
.