Re: TIB: Real number to string

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Re: TIB: Real number to string


Why not use modular arithmetic to separate out the particular digit you
care about? To isolate the "tenths" digit, multiply your number by 10,
truncate it, and then mod it by ten. Then I assume that the result can be
sent to the routine below. Place value was a HUGE advancement in the
development of mathematics. Please note that the routine proposed above and
left as an exercise from the reader can be put in a loop to extract N
digits from the original number efficiently (and without a lot of extra code).

The question is: if pi base ten is 3.14159...etcetc..., what is ten base pi?

At 21:02 16-09-2000 EDT, you wrote:
>
>At any rate, it is MUCH faster and smaller than using If Then groups.
>But think of it this way, you'd be in trouble if you wanted to do this with 
>decimal places and IF Then as well.  You'd need a seperate IF Then for every 
>tenth, going from 0.0 to 9.9 (100 If Then groups)! But I do see what you are 
>getting at.  The only solution is to optimise optimise optimise...
>
>
>>From: Eric Tollefson <CmdrERT01@yahoo.com>
>>Reply-To: ti-basic@lists.ticalc.org
>>To: ti-basic@lists.ticalc.org
>>Subject: Re: TIB: Real number to string
>>Date: Sat, 16 Sep 2000 00:38:06 -0400
>>
>>
>>Okay, I'll admit you've got me there.  But, you're still in trouble if you 
>>want
>>anything besides a whole number.  I suppose you could add in more of those 
>>and
>>use some fPart commands to add decimal places, but it would be large and 
>>awkward
>>to code for anything beyond maybe 1 or 2 decimal places.  My point was that
>>there is no built-in command to perform this task.  Although it would make 
>>life
>>peachy if there was.
>>
>>Eric Tollefson
>>CmdrERT01@yahoo.com
>>
>>"C.J. Wallace" wrote:
>>
>> > >I'll assume that that's for the 89, since I know of no such command on 
>>the
>> > >lower calcs, at least on the 83/83+ for sure.  And I'll go ahead and 
>>tell
>> > >you,
>> > >since I don't know what calc you're looking to use, if its an 83/83+,
>> > >you're
>> > >screwed.  As far as anyone has been able to work it out, there is no
>> > >command
>> > >to convert a number to a string.  The only possible way (and a very bad 
>>one
>> > >at
>> > >that) is to make a series of if/thens.  Unless you're desperate, I'd
>> > >suggest
>> > >figuring out a different way.
>> >
>> > NO! there is actually an easy way to do that on an 83!
>> >
>> > :"_"->Str1
>> > :Str1+sub("0123456789",A+1,1)->Str1
>> >
>> > A is the number that you want to input, and keep in mind that there has 
>>to
>> > be a character in the first position of the string, or else it won't 
>>work
>> > (It doesn't have to be a space like I put in).
>> >
>> > >Eric Tollefson
>> > >CmdrERT01@yahoo.com
>> > >
>> > >UT Rules wrote:
>> > >
>> > > > just store the number you were trying to store in quotation marks. 
>>here
>> > > > goes:
>> > > >
>> > > > "1.2"->x
>> > > > Disp x
>> > > >
>> > > > or you can simply display the variable like this:
>> > > >
>> > > > 1.2->x
>> > > > Disp (or ouput which ever you use) "You entered"&string(x)&"."
>> > > >
>> > > > the syntax for the string() function is- string(variablename) if you
>> > >ever
>> > > > wanna use it again.
>> > > > hopefully you know about the ampersand(&) which lets you put 
>>variables
>> > >in
>> > > > the sentences.
>> > > > if you need more help just e-mail me but i am sure one(both) of 
>>those
>> > >will
>> > > > work.
>> > > >
>> > > > Ridge Racer
>> > > >
>> > > > >From: "Andrew Hivner" <ahivner@desupernet.net>
>> > > > >Reply-To: ti-basic@lists.ticalc.org
>> > > > >To: <ti-basic@lists.ticalc.org>
>> > > > >Subject: TIB: Real number to string
>> > > > >Date: Mon, 11 Sep 2000 22:50:49 -0400
>> > > > >
>> > > > >
>> > > > >how do you convert a real number to a string with the number in 
>>it?,
>> > >ie:
>> > > > >1.2->x
>> > > > >magic part of program
>> > > > >Disp y
>> > > > >where y="1.2"
>> > > > >
>> > > > >Thanks
>> > > > >
>> > > > >Andrew
>> > > > >
>> >
>> > 
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