Created hexcalc.c 1993-01-24 Stable version 2007-07-04 Rewritten 2013-09-12 asin(), acos() atan() added. 2014-02-05 Stable version 2014-04-26 MIT-licence 2014-06-02 Use long double, long long int. Not double, long int. 2014-06-02 Shift operator <<,>> added. 2014-06-04 Choice of precision added. 2014-06-04 All calculations in long double. long double dropped. 2014-06-05