a super simple eval

[jack]

do have a link to your string math routines?

[bplus]

I think it's here: https://www.qb64.org/forum/index.php?topic=1093.0

Warning it's not simple.

[jack]

I tried to compile BNC from http://www.rain.org/~mkummel/tbvault.html
but there are too many duplicated symbols and a ton of string concatenations using & which QB64 doesn't like, so I gave up

[Pete]

https://www.tapatalk.com/groups/qbasic/viewtopic.php?p=212679#p212679

The second one of the two on that page is the most updated one I have. It matches the last build in my QB64 database.

It would need a lot more additions to use as a calculator, log functions, exponents, square roots, etc. This was something it looks like I did a year ago, for fun. Since I have no practical use for it, I moved on to other things, as just what was mentioned above would have nearly doubled the program size.

Computers suck at math, which is just so ironic, but obviously programmers found ways around this base two challenge to produce working calculator apps.

Since I just decided to manipulate numbers as strings, I never explored any other possible non-string converting methods, although I did work a bit with large data types like _INTEGER64 and _FLOAT, but eventually they break, too.

Pete

[jack]

thanks Pete
BTW, I changed the float type to _float, so now your example 5 - 5.1 = .1 :)
it was a fun distraction building and debugging this evaluator

[bplus]

thanks Pete
BTW, I changed the float type to _float, so now your example 5 - 5.1 = .1 :)
it was a fun distraction building and debugging this evaluator

new math?

[Pete]

thanks Pete
BTW, I changed the float type to _float, so now your example 5 - 5.1 = .1 :)
it was a fun distraction building and debugging this evaluator

Yep, now all you have to do is calculate the limitations, if you want to make it into a working calculator. I remember the old TI ones, from the early 1980's. They just throw a E on the screen for error, at some point. 16 digit display for the better ones, 8 digit display for the less expensive ones.

Pete

[jack]

new math?

in my haste I forgot the - sign in the post.

[Unseen Machine]

Quick and dirty trig functions you say!?

SUB GDK_MathX
  DECLARE LIBRARY
    FUNCTION atan2# (BYVAL y#, BYVAL x#)
    FUNCTION acos# (BYVAL x#)
    FUNCTION asin# (BYVAL x#)
    FUNCTION cosh# (BYVAL x#)
    FUNCTION sinh# (BYVAL x#)
    FUNCTION tanh# (BYVAL x#)
    FUNCTION pow# (BYVAL base#, BYVAL exponent#)
  END DECLARE
END SUB

Hope it helps

Unseen