BANG! And follow my blog.

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BANG! And follow my blog.

CalcGuy 02 Mar 2013 20:26

Hi guys, I thought I would introduce myself with a bang (just because). I've been programming TI-Basic for years throughout high school, am a senior this year and going into database administration in college. I'm currently learning the Z80 assembly language, so, its been pretty intense.

So I'm currently refining a lot of my old projects and programs and preparing to publish them, since I never got around to it before. I just started a blogging about it, its gonna be great fun, and I could always use some tips or help. So be sure to follow my blog at the link below!

calcprogrammer_com

Re: BANG! And follow my blog.

Xeda Elnara 03 Mar 2013 12:40

Your formula manager program has some pretty impressive features o.o Definitely if you have questions, feel free to ask. There is a section for Assembly stuff, too, and I can help out there. For your formulas, I typically do something like this:

• Make L1 and L2 the size of the number of variables possible. For example, solving a triangle, you might offer 6 variables to modify (angles and side lengths).
• Each element of L1 corresponds to a variable
• Each element of L2 should be set to 0.
• Let the user select a variable to edit.
• When the user enters a value for a variable, set the corresponding element in L2 to 1. 1 means the variable was input, 2 means it wasn't.
• To delete a variable, set the element in L2 to 0 and erase the value for L1.

Now when you are filling in the rest of the variables, you know which ones are known (L2 will have a 1) and which are unknown (0). I unfortunately never finished this (I wanted to add many more systems like a kinematics solver):

That might be useful for you. Because I am assuming you are storing all of the formulas and info about them such as tags in a string, you can probably make a field that tells which variables are used by the function so that they can be replaced accordingly.

I am just babbling at this point. Enjoy your stay here!

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Z80 Assembly>English>TI-BASIC>Python>French>C>0

Last edited on 04 Mar 2013 12:17 by Xeda Elnara Show more

Re: BANG! And follow my blog.

CalcGuy 04 Mar 2013 03:47

Thanks Xeda- that's a really great idea. I've been looking for some better interface ideas, and that definitely looks like a great way to spruce up the program's appearance. Yup, they are all stored in a string right now (when I used this on on a physics test last semester, I discovered the limit for length on strings is somewhere around 6000 characters when I tried to add one more formula to it, it totally crashed my calculator and cleared my RAM and I died on the test lolol woops).

But I really like the list idea- I think I'm going to put it to use. That's great!

Re: BANG! And follow my blog.

Xeda Elnara 04 Mar 2013 11:50

Wow, it is not likely to have string crash your calculator (but there are known ways). I can't wait to see how this turns out!

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Z80 Assembly>English>TI-BASIC>Python>French>C>0

Re: BANG! And follow my blog.

(account deleted) 08 Mar 2013 01:10

Welcome to the Site!

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Coffee + Radiohead = ^^