Need to convert FIF49 to Prime version

[DrD]

Programs similar to Eddie's FTIN and FIF49, require a lot of steps to get through a related problem, such as this one, taken from the provided examples in FIF49:

A 15' 9-1/2" wall is to have three 14-5/8" windows installed equally spaced. What is the horizontal space between the windows? To solve the problem you multiply the window width times three, subtract the total window width from the wall length, and divide the space remaining by four.

Press L1: FIF Remarks
FIF, FIF2 - - Opens FIF environment
15, FT or ENTER 15.00 15' 0" Wall width feet
9, IN 15.75 15' 9" Adds inches
1, /2 15.79 15' 9" 1/2 Adds halves
0, FT 0.00 0' 0" Assumes FIX 2 mode
14, IN 1.17 1' 2" L1: Must have a number
5, /8 1.22 1' 2" 5/8 Adds 5/8 inches
3, X 3.66 3' 7" 7/8 Width of 3 windows
- 12.14 12' 1" 5/8 Wall minus windows
4, ö 3.03 3' 0" 7/16 Space between windows

It's easier to enter the terms of this problem directly into the hp prime command line:

(15_(ft)+(9+(1/2))_(inch)-(3*(14+(5/8))_(inch)))/4; // ==> 3.03385416668_(ft);

FP(CAS.left(3.03385416668_(ft))) * 12; // to extract the fractional inches...

Multiply by the architectural fraction desired, to get the fractional inch measure, (round accordingly):
ROUND(FP(CAS.left(3.03385416668_(ft))) * 12 * 16,0); // For sixteenths ==> 3' 7/16"

So, just entering the terms of the problem, (with appropriate units), is actually easier than using the program ... not to mention creating the program in the first place!

-Dale-