Language Ccpp Cref Examples Var_func.c

/ ************************************************************************
 *
 * Purpose: Program to demonstrate functions that have a variable
 *	 number of parameters.
 * Author: M J Leslie.
 * Date: 28-Mar-94
 *
 ************************************************************************/
#include <stdio.h>
#include <stdarg.h>			/* va_list, va_arg, va_end	*/
int set(char *item, int num, ...);	/* Declare the function. */
/************************************************************************/
main()
{
 char *item="pear";
 int Ret;
 
 Ret = set (item,4, "apple", "pear", "banana", "grape");
 
 if (Ret)
 {
 printf ("%s found\n", item);
 }
 else
 {
 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 Ret=0;
 int Inc=0; /* Assume the worst. */
 va_start(ap, num);			/* seed 'ap'			*/
 do
 {
 if ( item == va_arg(ap, char *))
 {
 Ret = 1;
 }
 } while ( Ret==0 && ++Inc < num);
 va_end(ap);				/* tidy up.			*/
 return (Ret);
}

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