manual/examples/add.c

   1 #include <stdarg.h>
   2 #include <stdio.h>
   3
   4 int
   5 add_em_up (int count,...)
   6 {
   7   va_list ap;
   8   int i, sum;
   9
  10   va_start (ap, count);         /* Initialize the argument list. */
  11
  12   sum = 0;
  13   for (i = 0; i < count; i++)
  14     sum += va_arg (ap, int);    /* Get the next argument value. */
  15
  16   va_end (ap);                  /* Clean up. */
  17   return sum;
  18 }
  19
  20 int
  21 main (void)
  22 {
  23   /* This call prints 16. */
  24   printf ("%d\n", add_em_up (3, 5, 5, 6));
  25
  26   /* This call prints 55. */
  27   printf ("%d\n", add_em_up (10, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10));
  28
  29   return 0;
  30 }