| // Copyright 2014 The Rust Project Developers. See the COPYRIGHT |
| // file at the top-level directory of this distribution and at |
| // http://rust-lang.org/COPYRIGHT. |
| // |
| // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or |
| // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license |
| // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your |
| // option. This file may not be copied, modified, or distributed |
| // except according to those terms. |
| |
| //! Simple numerics. |
| //! |
| //! This crate contains arbitrary-sized integer, rational, and complex types. |
| //! |
| //! ## Example |
| //! |
| //! This example uses the BigRational type and [Newton's method][newt] to |
| //! approximate a square root to arbitrary precision: |
| //! |
| //! ``` |
| //! extern crate num; |
| //! |
| //! use num::bigint::BigInt; |
| //! use num::rational::{Ratio, BigRational}; |
| //! |
| //! fn approx_sqrt(number: u64, iterations: uint) -> BigRational { |
| //! let start: Ratio<BigInt> = Ratio::from_integer(FromPrimitive::from_u64(number).unwrap()); |
| //! let mut approx = start.clone(); |
| //! |
| //! for _ in range(0, iterations) { |
| //! approx = (approx + (start / approx)) / |
| //! Ratio::from_integer(FromPrimitive::from_u64(2).unwrap()); |
| //! } |
| //! |
| //! approx |
| //! } |
| //! |
| //! fn main() { |
| //! println!("{}", approx_sqrt(10, 4)); // prints 4057691201/1283082416 |
| //! } |
| //! ``` |
| //! |
| //! [newt]: https://en.wikipedia.org/wiki/Methods_of_computing_square_roots#Babylonian_method |
| |
| #![feature(macro_rules)] |
| |
| #![crate_id = "num#0.11.0"] |
| #![experimental] |
| #![crate_type = "rlib"] |
| #![crate_type = "dylib"] |
| #![license = "MIT/ASL2"] |
| #![doc(html_logo_url = "http://www.rust-lang.org/logos/rust-logo-128x128-blk-v2.png", |
| html_favicon_url = "http://www.rust-lang.org/favicon.ico", |
| html_root_url = "http://doc.rust-lang.org/0.11.0/", |
| html_playground_url = "http://play.rust-lang.org/")] |
| |
| #![allow(deprecated)] // from_str_radix |
| |
| extern crate rand; |
| |
| pub use bigint::{BigInt, BigUint}; |
| pub use rational::{Rational, BigRational}; |
| pub use complex::Complex; |
| pub use integer::Integer; |
| |
| pub mod bigint; |
| pub mod complex; |
| pub mod integer; |
| pub mod rational; |