(12C) Fractional Part Function

01032020, 05:34 AM
(This post was last modified: 01032020 05:43 AM by Gamo.)
Post: #1




(12C) Fractional Part Function
The HP55 doesn't have FRAC and INT funtions and I'm happen to see some
program example from HP55 User's Manual that program the fractional part routine in program. Try this Fractional Part routine and it work as expected on HP12C Since this type of problem still exist on some programmble calculator that doesn't have these funtion, couple friend of my have ask me about this type of problem before and I didn' t know any good solution yet, until now. This FRAC functions routine only work on "Positive Integer" Example: FIX 9 2 [√X] display 1.414213562 [R/S] display 0.414213562  355 [ENTER] 113 [÷] display 3.141592920 [R/S] display 0.141592920 Program: FRAC function Quote:01 ENTER Remark: Program line 03 to 07 by itself canbe use as INT function. Gamo 1/3/2020 

01032020, 06:15 AM
Post: #2




RE: (12C) Fractional Part Function
Doesn't the 12C have a FRAC function built in?
<0ɸ0> Joe 

01032020, 06:26 AM
Post: #3




RE: (12C) Fractional Part Function
Joe Horn
The HP12C got these functions. Just demonstrate this routine on 12C as an example, so that people who got other HP programmable calculator that doesn't have this function can adapt to it. Also HP55 manual use this algorithm so it must be good to share for those who interested. Gamo 

01032020, 02:13 PM
Post: #4




RE: (12C) Fractional Part Function
Aha, I understand now. Thanks, Gamo!
<0ɸ0> Joe 

01032020, 06:53 PM
(This post was last modified: 01032020 07:53 PM by Albert Chan.)
Post: #5




RE: (12C) Fractional Part Function
(01032020 05:34 AM)Gamo Wrote: Remark: Program line 03 to 07 by itself canbe use as INT function. I think it is more like ROUND function. We may go for FLOOR instead, remove the branching code. Quote:01 ENTER For 1E9 < v ≤ 8E9: above defined FRAC(v) as v  FLOOR(v) = v  (ROUND(v  0.5 + 2E9)  2E9) Example: 123.45 R/S → 0.45 123.45 CHS R/S → 0.55 

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