A command line calculator in Perl
pc 1+2 (1 plus 2)
3
pc 3x4 (3 times 4)
12
pc 5^6 (5 to the power of 6)
15625
pc v 49 ( square root of 49 )
7
pc 12/3 (12 divided by 3)
4
pc 19%4 (19 modulus 4)
3
(you can string maths together too)
pc 10 x 10 x 10
1000
pc 10 + 10 + 10 / 2
25
pc 7 x v49
49
$ perl -e 'for(@ARGV){s/x/*/g;s/v/sqrt /g;s/\^/**/g};print eval(join("",@ARGV)),$/;' 1+2
3
$ perl -e 'for(@ARGV){s/x/*/g;s/v/sqrt /g;s/\^/**/g};print eval(join("",@ARGV)),$/;' 3x4
12
$ perl -e 'for(@ARGV){s/x/*/g;s/v/sqrt /g;s/\^/**/g};print eval(join("",@ARGV)),$/;' 5^6
9
$ perl -e 'for(@ARGV){s/x/*/g;s/v/sqrt /g;s/\^/**/g};print eval(join("",@ARGV)),$/;' v9
3
$ perl -e 'for(@ARGV){s/x/*/g;s/v/sqrt /g;s/\^/**/g};print eval(join("",@ARGV)),$/;' 9/4
2.25
$ perl -e 'for(@ARGV){s/x/*/g;s/v/sqrt /g;s/\^/**/g};print eval(join("",@ARGV)),$/;' 19%4
3
What do you think?
Any thoughts on this command? Does it work on your machine? Can you do the same thing with only 14 characters?
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zsh-> print $((5**6))zsh-> print $((5**0.5))zsh-> print $[19 % 4]also does bitwise shift >>, ++/-- in/decrementingbc <<< 1+1echo $((1+1))