test/10-varargs.c


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/* EXPECT:
1 + 2 + 3 + 4 + 5 + 6 + 7 + 8 = 36
*/


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

int sum(int x, ...) {
   va_list ap;
   va_start(ap, x);
   printf("%d", x);
   for (int y; (y = va_arg(ap, int));) {
      printf(" + %d",y);
      x += y;
   }
   va_end(ap);
   return x;
}

int main() {
   printf(" = %d\n", sum(1,2,3,4,5,6,7,8,0,0));
}