| author | wenzelm |
| Fri, 03 Nov 2000 21:27:06 +0100 | |
| changeset 10379 | 93630e0c5ae9 |
| parent 10147 | 178deaacb244 |
| child 11049 | 7eef34adb852 |
| permissions | -rw-r--r-- |
| 9944 | 1 |
(* Title: ex/Fib |
2 |
ID: $Id$ |
|
3 |
Author: Lawrence C Paulson, Cambridge University Computer Laboratory |
|
4 |
Copyright 1997 University of Cambridge |
|
5 |
||
6 |
The Fibonacci function. Demonstrates the use of recdef. |
|
7 |
*) |
|
8 |
||
| 10147 | 9 |
Fib = Primes + |
| 9944 | 10 |
|
11 |
consts fib :: "nat => nat" |
|
12 |
recdef fib "less_than" |
|
13 |
zero "fib 0 = 0" |
|
14 |
one "fib 1 = 1" |
|
15 |
Suc_Suc "fib (Suc (Suc x)) = fib x + fib (Suc x)" |
|
16 |
||
17 |
end |