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Newcomers DBPro Corner / adding to numbers to get 1

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Rahil45
16
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Joined: 31st Jul 2008
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Posted: 14th Dec 2008 11:43
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Hi, im trying to make a program that calculates color bands on a resistor. All i need is someone to help we will this part, I need to put two seperate numbers to get one.
ex. 4 and 6 to get 46
ex. 2 and 7 to get 27
NOT 2+7 because that will get 8

any ideas anyone?
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IanM
Retired Moderator
22
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Posted: 14th Dec 2008 12:18
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Use STR$ or maths:


The first method will give you a string result, the second will give you a numeric result.

Utility plug-ins collection (updated 27/11/08) and
http://www.matrix1.demon.co.uk
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BlobVanDam
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Posted: 14th Dec 2008 12:25
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wait.... 2+7 = 8? Wow, I probably need to brush up on my maths before I continue programming
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Rahil45
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Posted: 14th Dec 2008 20:40
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heh, I mean 1+7=8, I just got stiches in my eye from sledding and it was 2 in the morning so I was a bit off. Thanks IanM.
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Rahil45
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Posted: 14th Dec 2008 22:45
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also, i have ran into another problem,


one=3
two=4
muly=100000



full=one*10+two
answer#=full*muly
if answer#=>1000 :pant=1
if answer#<1000000 then extra$="k" :answer#=answer#/1000
endif
if answer#=>1000000 then extra$="m" :answer#=answer#/1000000



for some reason when the one=anynumber>0 and two is anynumber>0 and the multiplier is 100 000, it always answers

ex. 3.400000000000091

i want just want 2 digits, but indead it gives me alot more
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Rahil45
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Posted: 14th Dec 2008 23:06
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sorry for the triple post, but heres a better example

do
a#=1.2
b#=1.3
c#=a#*b#
text 50,50,str$(c#)
if upkey()=1 then end
sync
loop
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spooky
22
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Location: United Kingdom
Posted: 14th Dec 2008 23:41
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Because of the way floats are stored not all numbers can be stored accurately. Other languages get around it by rounding the output and hiding the innacuracy from the user.

You best bet is to use the second parameter in str$ to set the number of dp you want, so if only 2dp is needed;



Boo!
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Rahil45
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Posted: 15th Dec 2008 00:36
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that just comes up with an error message for me, is there any other options? like a simple rounding sign or something??
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Phantom 2590
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Posted: 15th Dec 2008 01:12
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@Rahil45
I tried running the code spooky gave and it worked fine for me. Maybe it's something else that's giving you the problem. Try running just the code he gave by itself and see if that gives you an error and what the error is.

I was therefore I can be.
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Benjamin
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Posted: 15th Dec 2008 01:20
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Older versions of DBP don't have the rounding parameter in str, and that may be why you're getting the error. Try upgrading.

Multisync - TCP Server/Client Multiplayer Plugin (DBP/DBCe)
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Rahil45
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Posted: 15th Dec 2008 01:35
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The upgrading worked, as well as the code, thanks
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Phantom 2590
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Posted: 15th Dec 2008 01:38
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Good to hear that!

I was therefore I can be.
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Guyra
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Posted: 16th Dec 2008 23:54
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It wouldn't be bad to know that you can change the string back to a value using the VAL() command, either.



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