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From: Phred Phungus on 8 Feb 2010 20:07
Pascal J. Bourguignon wrote:

> Here is the copy-and-paste of a real interaction with the Common Lisp
> environment:
>
>
> C/USER[1]> (expt 2 100)
> 1267650600228229401496703205376
> C/USER[2]> (defun factorial (x) (if (< x 1) 1 (* x (factorial (- x 1)))))
> FACTORIAL
> C/USER[3]> (factorial 40)
> 815915283247897734345611269596115894272000000000
> C/USER[4]> (/ 2 3)
> 2/3
>
>
> Notice also that 2/3 is not 0, but 2/3.
>
> Also, notice that lisp is technology FIFTY years old, nothing from the
> other world. Where have you been in the last 50 years?

I had my first real interaction with lisp but with less-pretty results:

[1]> (expt 2 100)
1267650600228229401496703205376
[2]> (defun factorial (x) (if (< x 1) 1 (* x (factorial (- x 1)))))
FACTORIAL
[3]> (factorial 40)
815915283247897734345611269596115894272000000000
[4]> (/ 2 3)
2/3
[5]> (* 1 3)
3
[6]> 1267650600228229401496703205376
*815915283247897734345611269596115894272000000000
1267650600228229401496703205376
[7]>
*** - EVAL: variable *815915283247897734345611269596115894272000000000
has no
value
The following restarts are available:
USE-VALUE :R1 You may input a value to be used instead of
*815915283247897734345611269596115894272000000000.
STORE-VALUE :R2 You may input a new value for
*815915283247897734345611269596115894272000000000.
ABORT :R3 Abort main loop
Break 1 [8]> ( 1267650600228229401496703205376 *
815915283247897734345611269596115894272000000000)

*** - EVAL: 1267650600228229401496703205376 is not a function name; try
using
a symbol instead
The following restarts are available:
USE-VALUE :R1 You may input a value to be used instead.
ABORT :R2 Abort debug loop
ABORT :R3 Abort main loop
Break 2 [9]> h

*** - EVAL: variable H has no value
The following restarts are available:
USE-VALUE :R1 You may input a value to be used instead of H.
STORE-VALUE :R2 You may input a new value for H.
ABORT :R3 Abort debug loop
ABORT :R4 Abort debug loop
ABORT :R5 Abort main loop
Break 3 [10]>

Am I correct to think that this example had nothing to do with your
upthread calculation?
--
fred
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