HELP WANTED: LSRHS version of LOGO (DOSLOGO)

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2 total messages Started by John Savage Tue, 06 Oct 1992 08:16

#225

Author: John Savage
Date: Tue, 06 Oct 1992 08:16

28 lines
1794 bytes

I would like to hear from anyone running the LSRHS LOGO, so I can compare
notes on some mysterious behaviour I have found in the version I downloaded
from cher.media.mit.edu as DOSLOGO.

Specifically, I found that PRINT RANDOM 10000 works reliably, but
PRINT RANDOM 32767 works only about one time out of every five times I
execute it. (32767 is the largest positive integer for 16 bits).  Some
integer arguments are not accepted at all - I can live with that, but I
would like the largest range of random numbers, so why does RANDOM 32767
run only erratically??

Furthur, the ASCII function is strange.
To return the ASCII value of the character "0", one should use
PRINT ASCII "0 , but this returns a number cycling through this set, one
value at a time, every time it is run:
232 232 124 124 90 90 158 1158 28 28 !!!   None of these is correct.
To get the correct answer, I can use PRINT ASCII 0 ; but this cannot
be extended to finding the ASCII value of "D", etc.

Apart from these oddities, I like it.

-----------------------------------
John Savage
School of Maths, Physics, Computing & Electronics,
Macquarie Univerity.
Sydney.  Australia.                email: johns@macadam.mpce.mq.edu.au
-----------------------------------

Re: HELP WANTED: LSRHS version of LOGO (DOSLOGO)

#227

Author: George Mills
Date: Tue, 06 Oct 1992 19:44

49 lines
2429 bytes

johns@macadam.mpce.mq.edu.au (John Savage) writes:


>I would like to hear from anyone running the LSRHS LOGO, so I can compare
>notes on some mysterious behaviour I have found in the version I downloaded
>from cher.media.mit.edu as DOSLOGO.

>Specifically, I found that PRINT RANDOM 10000 works reliably, but
>PRINT RANDOM 32767 works only about one time out of every five times I
>execute it. (32767 is the largest positive integer for 16 bits).  Some
>integer arguments are not accepted at all - I can live with that, but I
>would like the largest range of random numbers, so why does RANDOM 32767
>run only erratically??

I'm not sure what's going on here. I will probably not fix it but I may
give an answer or a work around. My only interest is for MswLogo and it
turns out rnd crashes it (ouch). Thanks for reporting this. Note the source
is availble for DosLogo.


>Furthur, the ASCII function is strange.
>To return the ASCII value of the character "0", one should use
>PRINT ASCII "0 , but this returns a number cycling through this set, one
>value at a time, every time it is run:
>232 232 124 124 90 90 158 1158 28 28 !!!   None of these is correct.
>To get the correct answer, I can use PRINT ASCII 0 ; but this cannot
>be extended to finding the ASCII value of "D", etc.

Try this,

make "letter "a
ascii :letter
make "letter "b
ascii :letter

There does seem to be a problem with using ascii directly, this
should work around it and you can you can probably write a logo
routine yourself (e.g. myascii) to fix it). For some reason it does
works on MswLogo (Same exact code). Interestingly the Ascii command is
not documented anywhere? How did you know it existed?

>Apart from these oddities, I like it.

>-----------------------------------
>John Savage
>School of Maths, Physics, Computing & Electronics,
>Macquarie Univerity.
>Sydney.  Australia.                email: johns@macadam.mpce.mq.edu.au
>-----------------------------------

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