Loading custom character sets

Legacy · Post by **Legacy** » Mon Jan 12, 2009 8:04 pm

Jeff , if My Dear Aunt Sally applied here then it would still be incorrect. According to the order of operations, Multiplication takes precedence over Subtraction which is second and Addition is last in this case ,
My Dear Sally Aunt? . That's what it looks like to me, but then again, if multiplication was done first, then the correct answer would come out 7215 either way, only 1 is being subtracted, I think it goes x / + - , so maybe you were right after all but the way carlsson shows it is :

7168+6*8-1 = 7168+48-1 = 7168+47 = 7215 <- correct evaluation
Multiplication Subtraction Addition

which makes it look like subtraction comes before addition! oopsy doodles

Legacy · Post by **Legacy** » Mon Jan 12, 2009 8:28 pm

And now for the grand finale, thanks for the tips Carlsson, helped me finish up my screen pokes efficently whithout doin poke #, poke # , poke #, shout out to Kweepa an Carlsson!!
(ps. for unexpanded vic)

1 poke52,28:poke56,28: clr
2 for i=7168 to 7679:poke i,peek(i+25600):next
3 poke 36869,255
10 for l=7168 to 7168 + 6*8 - 1:read a:pokel,a:next
20 data 48,48,96,96,192,192,254,254
21 data 254,254,192,204,108,96,60,60
22 data 240,240,192,239,239,118,62,30
23 data 62,62,102,102,214,214,6,6
24 data 24,56,112,96,192,192,254,254
25 data 198,230,118,62,30,6,30,30
30 poke 36879,8
35 print"{clr}{white}{right 6, down7} @.a.b.c.d.e."
40 for s = 1 to 1000
45 for i = 1 to 7
50 p=38560
52 for v=1to6: poke p,i:p=p+2:next v
55 for t=1to25:next t:next i:next s

Leeeeee · Post by **Leeeeee** » Mon Jan 12, 2009 8:51 pm

Multiplication and division have the same priority and are executed in order left to right. The same is true for addition and subtraction.

Lee.

carlsson · Post by **carlsson** » Tue Jan 13, 2009 12:58 am

Legacy wrote:50 p=38560
52 for v=1to6: poke p,i:p=p+2:next v

Those two lines could possibly be rewritten as:

50 p=38560
52 for v=0 to 5:poke p+v*2,i:next v

or even:
50 for p=38560 to 38570 step 2:poke p,i:next p

It depends on whether you actually want variable p to be increased or not. The FOR statement will run up to and including 38570.

Post by **Jeff-20** » Tue Jan 13, 2009 1:57 am

Leeeeee wrote:Multiplication and division have the same priority and are executed in order left to right. The same is true for addition and subtraction.

What he said. :p

I'm shocked I even know that. I'm awful at math. Oddly enough, I didn't learn this in school. I learned it by trial and error on my VIC when I was 9 or something. Oh what a mystery that was. Pre-internet there were few places to get questioned answered so you just had to form and test your own theories.

carlsson · Post by **carlsson** » Tue Jan 13, 2009 2:25 am

The University of VIC-20.

DELETED · Post by **DELETED** » Wed Jan 14, 2009 11:03 am

DELETED

Pedro Lambrini · Post by **Pedro Lambrini** » Wed Jan 14, 2009 1:36 pm

Brackets, ORDER, Division, Multiplication, Addition, Subtraction. Order basically means 'to the power of'.

I remember that from school too!

Ian Colquhoun · Post by **Ian Colquhoun** » Wed Jan 14, 2009 1:40 pm

Pedro Lambrini wrote:Brackets, ORDER, Division, Multiplication, Addition, Subtraction. Order basically means 'to the power of'.

I remember that from school too!

Or even BEDMAS.

Brackets, exponents, division, multiplication, addition, subtraction.

What is "ORDER"? Isn't that what this whole discussion is about?

Pedro Lambrini · Post by **Pedro Lambrini** » Wed Jan 14, 2009 3:45 pm

I had a look around and found that on the BBC Childrens site they have changed the 'O' from the word Order to the word Other even though they explain Other to be the same as Order! Here's a quote:

"...All of these terms are fairly obvious except for 'Other', which are really just powers (e.g. 23 or 42 etc.)"

Hope that makes more sense.

Leeeeee · Post by **Leeeeee** » Wed Jan 14, 2009 5:35 pm

Also don't forget AND and OR with AND being lower prioroty than add or subtract and OR being the lowest priority of all.

Lee.

Post by **Jeff-20** » Wed Jan 14, 2009 5:51 pm

I have always been confused by the priority the VIC gives logical connectives. Every time I use it I have to experiment until I get the desired results. And I always forget the next time I need it.

What is the definitive rule for AND, OR, NOT? I think the VIC may not follow the normal rules here.

Leeeeee · Post by **Leeeeee** » Wed Jan 14, 2009 6:44 pm

Priorities in descending order are ..

()
^
preceding -, e.g. A=-7*3 does (-7)*3
* /
+ -
NOT
AND
OR

This is pretty much standard for all Microsoft BASICs.

Lee.

carlsson · Post by **carlsson** » Thu Jan 15, 2009 6:15 am

BEDMAS sounds like a holiday you spend asleep.

MacbthPSW · Post by **MacbthPSW** » Thu Jan 15, 2009 9:08 am

I learned it as BEDMAS too. Must be an Ontario thing?