text: #include <stdarg.h>
  
  void setv(int num, ...) {
      va_list l;
      int *x;
  
      (void) num;
  
      /* in this test we have only one var arg */
      va_start(l, num);
      x = va_arg(l, int *);
      *x = 13;
      va_end(l);
  }
  
  int main(void) {
      int a;
      setv(1, &a);
      test_assert(a == 13);
      return 0;
  }
  