A calculator written in c using a recursive descent parser. llcalc has great error messages.
##Using
$ make
$ ./calc
>> foo = 2 * 3
=> 6
>> bar = foo ^ 2
=> 36
>> baz = foo + bar
=> 42
>> 5 + (2^%)
Expected a number, but got a '%'
5 + (2^%)
~~~~~~~^
You see? Great error messages!
##License
llcalc is licensed under the terms of the GPLv2.
llcalc contains khash.h which is licensed under the terms of the MIT license. More info can be found here: http://attractivechaos.awardspace.com/khash.h.html
llcalc contains linenoise, which is licensed under the terms of the BSD license. More info can be found in linenoise.c.