Clock Hands Challenge

[RMollov]

(03-06-2019 02:10 AM)Valentin Albillo Wrote:  English is not my first language (that would be Spanish) but I understood it like this:

"I wonder what would be the shortest program for a 2-line display HP/DM calc (i.e.: HP42S / DM42) that shows at what time (accurate to the second) past a user-specified hour (i.e.: 0:00, 1:00, ... 23:00) would the clock's hands form an angle of either 0º or 180º."

Best regards.
V.
.

Thanks, Valentin, that's it! English isn't my first language too
One note, on an analog clock 13, 14 etc. do not exist, so the input ("Hour") is MOD'd to 12.
Thank you all, I should have posted here my solution which does what I meant. Here it is:

Code:


00 { 71-Byte Prgm }
01▶LBL "CLOCK"
02 IP
03 12
04 MOD
05 STO "Hour"
06 6
07 X≤Y?
08 +/-
09 SIGN
10 180
11 ×
12 30
13 RCL× ST Z
14 +
15 120
16 ×
17 11
18 ÷
19 3600
20 ÷
21 →HMS
22 +
23 RCL "Hour"
24 11
25 ÷
26 →HMS
27 RCL+ "Hour"
28 END

So hands (past "the" "Hour") are either on top of each other, or one is a prolongation of the other at the times in X and Y of HP42S or DM42 (if stack arrangement fits HP42's) running the program with "Hour" in X.

Thanks and sorry for the ambiguity in my first post, hope now it's clearer