(function "square" (x: float)
   ( *f x x))

(function "integr" (f: addr low: float high: float n: int)
  (let (h (/f (-f high low) (floatofint n))
        x low
        s 0.0
        i n)
    (while (> i 0)
      (assign s (+f s (app f x float)))
      (assign x (+f x h))
      (assign i (- i 1)))
    ( *f s h)))

(function "test" (n: int)
  (app "integr" ["square" 0.0 1.0 n] float))