2-D variable array

MacGeek117

How do you make one with a BS2?
bugg

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But I canna change the laws of physics, Captain!

Jon Williams

PBASIC does not support two-dimensional arrays.·

You can use a 1-dimensional array and some crafty coding.· Let's say you want a 2x3 array of bytes.

myArray········ VAR···· Byte(6········· ' 2 x 3 bytes
row············ VAR···· Nib
col············ VAR···· Nib
idx············ VAR···· Nib
Main:
· row = 0
· col = 2
· idx = row * 3 + col
· myArray(idx) = 10
·


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Jon Williams
Applications Engineer, Parallax
Dallas, TX· USA

Post Edited (Jon Williams) : 3/9/2005 6:50:16 PM GMT

Jim McCorison

Bugg,

Here is a slightly more expanded version of that which I posted a couple months ago. The problem is that you can quickly run out of space as 26 bytes of variable will dissapear pretty quickly. This sample defines a 2x4 table of a two byte variable.

Jim

Edit: Actually, in looking at the code again, there is a glaring bug in how I set and retrieve the contents of the variable. I'm setting and retrieving a single byte, when the variable is supposed to be two bytes. But that doesn't change the basic concept of how the pointer works to get to the location in the array.

Post Edited (Jim McCorison) : 3/10/2005 1:19:52 AM GMT

MacGeek117

If there is a next version of PBASIC could you please have 2D arrrays?
Thanks Jon nd Jim!
bugg

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But I canna change the laws of physics, Captain!

Pinoy NYC

it would be good if we can also have:

1.) string type variable
2.) signed byte, word/integer, doubleword/long integer
3.) double/floating type variable