#lang planet jaymccarthy/superc
(require scheme/unsafe/ops)

(define loop (get-ffi-obj 'loop this-lib (_fun _int _pointer -> _void)))

(define HOW-MANY (read))
(define the-vector (malloc _float HOW-MANY 'raw))

(for ([i (in-range HOW-MANY)])
  (ptr-set! the-vector _float i (read)))
  
(time
 (loop HOW-MANY the-vector))

(free the-vector)

@---------@
void loop (int how_many, float *input) {
 int i;
 for (i = 0; i < how_many; i++) {
  input[i] = input[i] * input[i];
 }
 return;
}