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 07-19-2017, 03:02 PM #1 dedec0 Senior Member   Registered: May 2007 Posts: 1,129 Rep: Do you know a command or shell script to sum hours:minutes:seconds? I have a scientific calculator that has a [NICE] button which deals with time. "Time", for it, is a unlimited number of hours (or degrees, if you prefer), number of minutes and number of seconds. It works like this: We type number of hours (not limited to 24 or 360). Nothing new here. After that, we may type "[NICE], number of minutes, [NICE]". This will make the number of hours (a real) be increased with the right fractional part. For example: "8 [NICE] 30 [NICE]" gives the result 8.5, which means 8 and half hours. Good? After that, we may follow with "number of seconds, [NICE]", which will work similarly to what was done for the minutes we typed. For example: "8 [NICE] 30 [NICE] 900 [NICE]" gives the result of 8.75. Observe that 900 seconds is 0.25 hours, which was added to our previous result. For any real number, we may check what it represents in [HOURS/DEGREES]:MINUTES:SECONDS. For example: Make 8.75 be the current number, in any way. Then we type "[shift] [NICE]" to get "8 o 45 o 0". My "o" here is the closest I could type to what my calc shows, which is an "o" at half line height. But you got it: 8 degrees 45' 0" So, do you know a script or something ready to use that works in a shell? Something like this would happen in a terminal: Code: ```\$ time 8 45 00 # separators maybe ":" too 8.75 \$ time 8 30 0 + 0 15 0 # "1" for min. or sec. mean "01", *not* "10" 8.75 \$ time -r 8.75 # "-r" or "--reverse" means... do the reverse! haha 8:45:00``` I found this, but it is not really what I wanted. So, do you have something to make that?
 07-19-2017, 03:20 PM #2 Laserbeak Member   Registered: Jan 2017 Location: Manhattan, NYC NY Distribution: Mac OS X, iOS, Solaris Posts: 508 Rep: I'm sure complex programs like Mathematica do that, but I haven't run across something free that just does that (not to say such thing doesn't exist), but it should be quite easy to program in C or something if you are so inclined. Last edited by Laserbeak; 07-19-2017 at 03:22 PM.
 07-19-2017, 03:24 PM #3 Laserbeak Member   Registered: Jan 2017 Location: Manhattan, NYC NY Distribution: Mac OS X, iOS, Solaris Posts: 508 Rep: This would be actually a cool iPhone program to write... hmmm
 07-19-2017, 03:55 PM #4 dedec0 Senior Member   Registered: May 2007 Posts: 1,129 Original Poster Rep: I agree with you, Laserbeak. It is actually not that hard to make, so I imagined that it would exist. Quite useful! I do not know how to use everything my sci calc has, but what I called the "[NICE]" button has been useful several times! (: I will suggest it to gcalctool, which does not have it - seems - among all its tastes: basic, advanced, financial, scientific and programmable. If I make the script, or if needing a help with some details, I post here.
07-19-2017, 06:26 PM   #5
dc.martin
LQ Newbie

Registered: Jan 2017
Posts: 3

Rep:
Try something like this:

Quote:
 #!/bin/bash ## script name: hours ## invocation: hours WHOLE_NUMBER_OF_HOURS [WHOLE_NUMBER_OF_MINUTES] [WHOLE_NUMBER_OF_SECONDS] ## Expresses hours in decimal based on input of hours, minutes, seconds ## minutes input can exceed 1 hour, ie, m>60 is ok ## seconds input can exceed 1 minute or 1 hour, ie, s>60 is ok, as is s>3600 h=\$1 ## hours m=\$2 ## minutes s=\$3 ## seconds # ## set hours, minutes, and second to 0 if variables are unset # echo \${h:-0} hours \${m:-0} minutes \${s:-0} seconds bc <<< "scale=4;(\${h:-0}*60^2 + \${m:-0}*60 + \${s:-0})/60^2"
Here are examples:

Quote:
 \$ hours 1 1 hours 0 minutes 0 seconds 1.0000 \$ hours 1 45 1 hours 45 minutes 0 seconds 1.7500 \$ hours 1 45 1800 1 hours 45 minutes 1800 seconds 2.2500

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