Scheme 48 implementation of Scheme

Harald Loeffler | 12 Nov 1993 10:36

(unknown)

Hi,
we have found a new (?) bug in your scheme48 0.17:

     (sqrt 1) causes a DIVISON BY ZERO error.

headers

Harald Loeffler | 25 Nov 1993 09:18

Possible bug ?

Hello guys !

I have a question about how to get a number of the typ "real"
All my procedures give me figures like :  345534654365436/3245324663346

Is this normal ? I don't think so, because in other scheme-implementations
I can fix this problem by multiplikating the number with 1.0.

I hope you can help me.

Thanks

Harald Loeffler

headers

kelsey | 25 Nov 1993 16:05

Possible bug ?

   From: Harald Loeffler <loefflhd <at> trick.informatik.uni-stuttgart.de>
   Date: Thu, 25 Nov 93 09:18:56 +0100

   I have a question about how to get a number of the typ "real"
   All my procedures give me figures like :  345534654365436/3245324663346

   Is this normal ? I don't think so, because in other scheme-implementations
   I can fix this problem by multiplikating the number with 1.0.

The current version of Scheme 48 does not have floating point numbers.
Real numbers are represented as inexact rational numbers:

  > 23/10
  23/10
  > #i23/10
  2.3
  >

You can make numbers look more as you might expect:

  > (define precision 10000000)
  > (define (print-as-float x)
      (display (exact->inexact (/ (quotient (* precision (numerator x))
                                            (denominator x))
                                  precision))))
  > (begin (print-as-float 345534654365436/3245324663346) (newline))
  106.4715214
  >

(Continue reading)


Mon	Tue	Wed	Thu	Fri	Sat	Sun
1	2	3	4	5	6	7
8	9	10	11	12	13	14
15	16	17	18	19	20	21
22	23	24	25	26	27	28
29	30

Mon

Tue

Wed

Thu

Fri

Sat

Sun

8	April 2013
3	March 2013
1	February 2013
7	January 2013
6	December 2012
11	November 2012
10	October 2012
8	August 2012
1	July 2012
11	June 2012
4	May 2012
2	February 2012
30	January 2012
9	December 2011
1	November 2011
9	October 2011
5	September 2011
16	August 2011
3	July 2011
4	June 2011
2	May 2011
12	April 2011
6	March 2011
1	February 2011
19	January 2011
3	December 2010
3	October 2010
3	August 2010
1	July 2010
6	April 2010
4	March 2010
4	February 2010
7	January 2010
28	December 2009
9	November 2009
10	October 2009
9	September 2009
25	August 2009
12	July 2009
9	June 2009
10	May 2009
4	April 2009
28	March 2009
3	February 2009
4	January 2009
7	December 2008
11	November 2008
19	October 2008
6	September 2008
21	August 2008
17	July 2008
12	June 2008
12	May 2008
38	April 2008
18	March 2008
40	February 2008
14	January 2008
10	December 2007
3	November 2007
1	October 2007
16	September 2007
12	August 2007
7	July 2007
12	June 2007
4	May 2007
10	April 2007
11	March 2007
11	February 2007
18	January 2007
6	December 2006
20	November 2006
23	October 2006
13	September 2006
29	August 2006
35	July 2006
34	June 2006
18	May 2006
7	April 2006
16	March 2006
23	February 2006
7	January 2006
7	December 2005
18	November 2005
29	October 2005
17	September 2005
8	August 2005
37	July 2005
35	June 2005
30	May 2005
29	April 2005
31	March 2005
11	February 2005
11	January 2005
23	December 2004
17	November 2004
12	October 2004
8	September 2004
19	August 2004
24	July 2004
4	June 2004
6	April 2004
2	December 2003
6	November 2003
9	October 2003
1	September 2003
1	August 2003
7	July 2003
2	June 2003
2	April 2003
2	January 2003
7	September 2002
1	August 2002
2	July 2002
4	June 2002
6	May 2002
3	April 2002
9	March 2002
3	February 2002
8	January 2002
3	November 2001
8	October 2001
7	September 2001
4	August 2001
3	July 2001
9	June 2001
18	May 2001
2	January 2001
2	October 2000
1	May 2000
1	April 2000
8	March 2000
1	February 2000
4	January 2000
4	December 1999
7	November 1999
6	October 1999
22	September 1999
5	August 1999
3	July 1999
1	June 1999
2	April 1999
2	March 1999
6	February 1999
14	January 1999
4	December 1998
2	October 1998
5	August 1998
7	July 1998
2	June 1998
3	May 1998
21	April 1998
6	March 1998
9	February 1998
6	January 1998
5	December 1997
5	November 1997
22	October 1997
13	September 1997
3	August 1997
5	July 1997
6	June 1997
1	May 1997
12	April 1997
9	March 1997
1	February 1997
1	January 1997
4	December 1996
5	November 1996
4	October 1996
9	September 1996
6	August 1996
25	July 1996
15	June 1996
18	May 1996
1	March 1996
1	February 1996
6	January 1996
2	December 1995
23	November 1995
3	October 1995
8	September 1995
2	August 1995
3	July 1995
8	June 1995
8	May 1995
5	April 1995
13	February 1995
26	January 1995
29	December 1994
26	November 1994
12	October 1994
21	September 1994
34	August 1994
48	July 1994
16	June 1994
21	May 1994
18	April 1994
27	March 1994
26	February 1994
6	January 1994
6	December 1993
3	November 1993
1	October 1993
2	September 1993
8	July 1993
3	June 1993
2	May 1993
6	April 1993
1	March 1993
4	October 1992