A fixed point basic calculator for DASH. Post: 303026296

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Operating Systems OS X (Apple) A fixed point basic calculator for DASH. Post 303026296 by wisecracker on Friday 23rd of November 2018 05:06:21 PM

11-23-2018

Registered User

Apologies for the delay, I am a carer or babysitter presently for my mother or grandchild and dogs.
However @ Corona688...

Well tested your 'BASH' version with just one edge case and there will be quite a few...
Note with your original, 2.0 - 3.14159 = -1.141, not what is shown.
Then I just did one edge case, I changed '2.0' to '0.073' and...
NOTE: Not related to either your or my versions; I have manually found many edgecases. Python was a godsend for this task.

Code:

Last login: Fri Nov 23 21:29:04 on ttys000
AMIGA:amiga~> cd Desktop/Code/Shell
AMIGA:amiga~/Desktop/Code/Shell> ./FPMATH_C688.sh
3.14159 * 2.0 = 6.282
3.14159 / 2.0 = 1.570
2.0 - 3.14159 = 1.141		# WRONG! -1.141
3.14159 - 2.0 = 1.141
3.14159 + 2.0 = 5.141
AMIGA:amiga~/Desktop/Code/Shell> # Just one edge case, change BB to 0.073.
AMIGA:amiga~/Desktop/Code/Shell> ./FPMATH_C688.sh
3.14159 * 0.073 = 0.185
3.14159 / 0.073 = 53.237
0.073 - 3.14159 = 3.082
3.14159 - 0.073 = 3.082
3.14159 + 0.073 = 3.200
AMIGA:amiga~/Desktop/Code/Shell> # Oops, they are all wrong.
AMIGA:amiga~/Desktop/Code/Shell> _

Code:

Google calculator:
3.14159 * 0.073 = 0.229
3.14159 / 0.073 = 43.035
0.073 - 3.14159 = -3.068
3.14159 - 0.073 = 3.068
3.14159 + 0.073 = 3.214

As I said I have learnt a lot about 'dash' and POSIX. Your 'heredoc' code is wonderful.
As above I have found many edge cases.
Also the strange effects closing the gaps to the + or - limits I have set.
I will be back ASAP but family comes first.

Last edited by wisecracker; 11-24-2018 at 05:37 AM.. Reason: Correct grammar.

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fixed

fixed(3alleg4)							  Allegro manual						    fixed(3alleg4)

NAME

       fixed - Fixed point integer to replace floats. Allegro game programming library.

SYNOPSIS

       #include <allegro.h>

       typedef long fixed

DESCRIPTION

       This  is  a  fixed  point  integer  which can replace float with similar results and is faster than float on low end machines. Read chapter
       "Fixed point math routines" for the full explanation.

SEE ALSO

       ,  ex12bit(3alleg4),   ex3buf(3alleg4),	 ex3d(3alleg4),   excustom(3alleg4),   exfixed(3alleg4),   exrotscl(3alleg4),	exspline(3alleg4),
       exsprite(3alleg4), exstars(3alleg4), exupdate(3alleg4)

Allegro 							   version 4.4.2						    fixed(3alleg4)