[SOLVED] Calc

Blue-Knight · 09-08-2015, 11:21 PM

Hi!

I have a code:

Code:

part1=10; for (( c=1; c<=12; c++ )); do part2=$(calc -p "$part1 / 100 * 25"); part1=$(calc -p "$part1 + $part2"); echo "$part1"; done

I have this problem:

Code:

12.5
15.625
19.53125
24.4140625
30.517578125
38.14697265625
47.6837158203125
59.604644775390625
74.50580596923828125
93.1322574615478515625
69.84919309616088867188
87.31149137020111083985

The problem is that for "calc", this "93.13 + ~23.12" and this "93.13 + 23.12" is not the same and the result is "incorrect".

Is there any way I could get rid of that annoying behavior?

Thank you!

EDIT:
I found a "solution" by doing this:

Code:

part1=10; for (( c=1; c<=12; c++ )); do part2=$(calc -p "$part1 / 100 * 25" | tr -d '~'); part1=$(calc -p "$part1 + $part2" | tr -d '~'); echo "$part1"; done

If you know of a better solution, please let me know.

Thank you!

EDIT:
A better solution was provided by norobro:

Code:

part1=10; for (( c=1; c<=12; c++ )); do part2=$(calc -p -d "$part1 / 100 * 25"); part1=$(calc -p -d "$part1 + $part2"); echo "$part1"; done

Thank you!

norobro · 09-09-2015, 10:16 AM

From the calc man page:

Quote:

-d Disable the printing of the opening title.

Blue-Knight · 09-09-2015, 10:34 AM

Quote:

Originally Posted by norobro

From the calc man page:

Well, that is not clear. But it worked.

Thank you!

norobro · 09-09-2015, 10:49 AM

You're welcome!

Quote:

Originally Posted by Blue-Knight

Well, that is not clear.

What do you find not clear about it?

Edit: I see what you mean, the "title" in post #2 is a typo. I read the source code and copied from the man page. I reported it to the devs.
From lib_calc.c:

Code:

	/*
	 * -d turns off resource_debug and tilde
	 */