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(************************************************************************)
(* * The Coq Proof Assistant / The Coq Development Team *)
(* v * Copyright INRIA, CNRS and contributors *)
(* <O___,, * (see version control and CREDITS file for authors & dates) *)
(* \VV/ **************************************************************)
(* // * This file is distributed under the terms of the *)
(* * GNU Lesser General Public License Version 2.1 *)
(* * (see LICENSE file for the text of the license) *)
(************************************************************************)
Require Import Floats ExtrOCamlFloats.
Require Import List. Import ListNotations.
(* from Require Import ExtrOcamlBasic. *)
Extract Inductive list => list [ "[]" "( :: )" ].
Local Open Scope float_scope.
(* Avoid exponents with less than three digits as they are usually
displayed with two digits (1e7 is displayed 1e+07) except on
Windows where three digits are used (1e+007). *)
Definition list_floats :=
[nan; infinity; neg_infinity; zero; one; two;
0.5; 0.01; -0.5; -0.01; 1.7e+308; -1.7e-308].
Recursive Extraction list_floats.
Definition discr a b c := b * b - 4.0 * a * c.
Definition x1 a b c := (- b - sqrt (discr a b c)) / (2.0 * a).
Recursive Extraction x1.
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