Using a constant pointer like Str1 instead of a variable pointer like A is an optimization technique. Both methods will produce the same end results. But if you use a constant, your code will be smaller and faster.

A static variable is the same as a number to Axe, so 0→{L6}^r is exactly the same as 0→{37696}^r to Axe.

Variables are really shortcuts for {POINTER}^r, so 0→A is exactly the same as 0→{°A}^r is exactly the same as 0→{34852}^r.

So if you were to do 0→{A}^r, what you're really doing is  0→{{34852}^r}^r. That's why it's less optimized.

EDIT: Ninja'd.

I suppose you could use bit arithmetic with a pointer to a Pt-Get('ed sprite. I'm not too clear on how that would work though.

I suppose you could use bit arithmetic with a pointer to a Pt-Get('ed sprite. I'm not too clear on how that would work though.

If it's byte-aligned, he could even work with the bytes directly, instead of using Pt-Get(. With that said, the fastest way to find the number of set bits in a byte (which is a necessary part of this) is almost certainly a look-up table. Yes, it's 256 bytes, but it's far faster than any bit arithmetic you can do.

If exactly one number will be zero and the numbers aren't sorted in any way, I'm pretty sure the best way is to go through them with a variable containing the minimum value, while ignoring zeroes.
Here, for example, is some code that will give the minimum non-zero value in the first 100 bytes of L₁ in M (And -1 if they're all 0):
-1->M
L1->X
For(100
If ({X}->V<M)?V=/=0
V->M
End
X++
EndThere's probably a more optimized way to write that, but it should work.
If there could be more than one zero, the essence of what you have to do is have a flag that records whether you've already encountered one zero.
Edit: Runer112 wins by far. The method I've proposed would work better across lots of values (perhaps at least 10) than across 4.

How do I achieve this? (program image and text)

To quote the documentation:

The next thing you absolutely need is an Axe Header. You must start the first line with a
period, which is a comment in Axe, followed by the name you want for the compiled
program. If you want a program description, you can type a space and then the
description on that same line, but this is optional. In the above example your program
might look like this:

Code: [Select]

PROGRAM:MARIOSRC
:.MARIO A fun platformer
:

And to quote the commands list:

#Icon(HEX) _{Key: identity()}   Tells the parser to replace the default icon with the new icon. The icon must be 64 hex characters long.