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

int sumup(int, ...);

int main(void)
{
   int i = 295, j = 3, k = 450, res;
   res = sumup(3, i, j, k);

   printf("Sum: %d\n", res);

   return 0;
}

int sumup(int num, ...) 
{
   int sum;
   va_list ap;
 
   va_start(ap, num);
   sum = 0;
   for (int i = 0; i < num; i++)
      sum += va_arg(ap, int);
   va_end(ap);
   return sum;

}