Complex math within an alias

Posted by Aralia Faal on Wed 10 Oct 2012 04:45 AM — 10 posts, 37,388 views.

Aralia Faal Wed 10 Oct 2012 04:45 AM #0

Alright so I want to make an alias that takes two variables, @strength and @constitution, and adds them together then divides that by 10 then divides that by 2. Once the math is done it would SendImmediate (train %1 ##). Where ## is the outcome of the math.

I tried doing this on my own, starting with:

bc.digits (20)
n = bc.number (((@strength + @constitution) / 10) / 2)
print(n)

Witch worked so I changed print(n) to SendImeediate(n) which also worked. But the moment I tried adding anything before the n within the ( ) it failed.

Could I please get some help?

Nick Gammon Australia Forum Administrator Wed 10 Oct 2012 05:49 AM #1

Please show the whole thing:

For advice on how to copy aliases, timers or triggers from within MUSHclient, and paste them into a forum message, please see Copying XML.

Aralia Faal Wed 10 Oct 2012 06:12 AM #2

The capture trigger:


<aliases>
  <alias
   match="train *"
   enabled="y"
   expand_variables="y"
   send_to="12"
   sequence="100"
  >
  <send>bc.digits (20)
n = bc.number (((@strength + @constitution) / 10) / 2)
SendImmediate(n)</send>
  </alias>
</aliases>

The Variable:


<variables>
  <variable name="Constitution">578</variable>
</variables>

<variables>
  <variable name="Strength">496</variable>
</variables>

Nick Gammon Australia Forum Administrator Wed 10 Oct 2012 08:24 AM #3

Why are you using bc? That is for, like, hundreds of digits of precision.

Fiendish USA Global Moderator Wed 10 Oct 2012 12:55 PM #4

Quote:
the moment I tried adding anything before the n within the ( ) it failed.

Please show what you tried doing that failed.

Aralia Faal Wed 10 Oct 2012 02:01 PM #5

Nick Gammon said:

Why are you using bc? That is for, like, hundreds of digits of precision.

Because I'm not all that good with the functions and it was the first thing I found that began to work for what I wanted.

Fiendish said:

Quote:
the moment I tried adding anything before the n within the ( ) it failed.

Please show what you tried doing that failed.

I first started with what I wanted it to be:


<aliases>
  <alias
   match="train *"
   enabled="y"
   expand_variables="y"
   send_to="12"
   sequence="100"
  >
  <send>bc.digits (20)
n = bc.number (((@strength + @constitution) / 10) / 2)
SendImmediate(train %1 (n))</send>
  </alias>
</aliases>

I got the error:

Error number: 0
Event: Compile error
Description: [string "Alias: "]:3: ')' expected near 'str'
Called by: Immediate execution

I removed the %1 for now, using str, to see if I could get the "n" to work. But it just sends "train str (n)" exactly as it is.

Nick Gammon Australia Forum Administrator Wed 10 Oct 2012 08:50 PM #6

It would be more like:


Send ("train %1 " .. n)

One is a literal, one is a variable.


bc.digits (20)
n = bc.number (((@strength + @constitution) / 10) / 2)

can be just:


n = ((@strength + @constitution) / 10) / 2)

Aralia Faal Wed 10 Oct 2012 10:13 PM #7

Awsome! Can always count on you.

Is there a way to make it round up to the next whole number?

Nick Gammon Australia Forum Administrator Thu 11 Oct 2012 02:58 AM #8

http://www.gammon.com.au/modules

Inside commas.lua is a round function.

eg.


require "commas"

n = round (n)

Aralia Faal Thu 11 Oct 2012 03:05 AM #9

Thanks. You are a big help, as always.