晋太元中，武陵人捕鱼为业。缘溪行，忘路之远近。忽逢桃花林，夹岸数百步，中无杂树，芳草鲜美，落英缤纷。渔人甚异之，复前行，欲穷其林。 　　林尽水源，便得一山，山有小口，仿佛若有光。便舍船，从口入。初极狭，才通人。复行数十步，豁然开朗。土地平旷，屋舍俨然，有良田、美池、桑竹之属。阡陌交通，鸡犬相闻。其中往来种作，男女衣着，悉如外人。黄发垂髫，并怡然自乐。 　　见渔人，乃大惊，问所从来。具答之。便要还家，设酒杀鸡作食。村中闻有此人，咸来问讯。自云先世避秦时乱，率妻子邑人来此绝境，不复出焉，遂与外人间隔。问今是何世，乃不知有汉，无论魏晋。此人一一为具言所闻，皆叹惋。余人各复延至其家，皆出酒食。停数日，辞去。此中人语云：“不足为外人道也。”(间隔 一作：隔绝) 　　既出，得其船，便扶向路，处处志之。及郡下，诣太守，说如此。太守即遣人随其往，寻向所志，遂迷，不复得路。 　　南阳刘子骥，高尚士也，闻之，欣然规往。未果，寻病终。后遂无问津者。 .
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This is GNU bc version 1.07.1.  (And dc version 1.4.1)

Changes in bc from 1.07 to 1.07.1.
    Fixed ibase extension causing problems for read()
    Fixed parallel make problem.

Changes in dc 1.4 to 1.4.1.
    Fixed dc "Q" comanmd bug.

Changes in bc from 1.06 to 1.07.
    Added void functions.
    Bug fixes:
	fixes bug in load_code introduced by mathlib string storage in 1.06.
	fix to get long options working.
	signal code clean-up.
	fixed a bug in the AVL tree routines.
	fixed math library to work properly when called with ibase not 10.
	fixed a symbol table bug when using more than 32 names.
	removed a double free.
    Added base 17 to 36 for ibase.
    Fixed some memory leaks.
    Various small tweaks and doc bug fixes.

Changes in dc from 1.3 to 1.4:
    Recognize and handle tail recursion.
    Add 'r' and 'R' commands for stack manipulation.
    Finally fix dc to trap interrupts, like the documentation has said it
    should: aborts any executing macros, but does not exit the program.
    Bug fixes.
    Miscellaneous code clean-up.
    Changed to detect directories and generate errors.
    Detects and reports on any output errors; exits non-success.

Changes in dc from 1.2 to 1.3:
    Minor bug fixes.
    New multiply algorithm of bc.

Changes in bc from 1.05 to 1.06:
    New multiply algoirthm and many other changes in lib/number.c
    Function size now done dynamically.
    Function syntax in non-posix mode allows newlines in more places.
    Bug fixes:
	improved computation of j(n,x).
	enables readline only if interactive.
	for statment bug fixed.
	use int instead of char for readline char counts.
	improved cosine accuracy.

Changes in dc from 1.1 to 1.2:
    added !< != !> commands
    arrays now stack
    output is now line buffered, provided setvbuf() is available
    fixed known bugs in 'q', 'Q', 'a' commands, '-f' command-line option,
      and documentation
	changed the 'P' command's behavior on a numeric argument:
	  due to popular demand it now does the equivalent of 'aP'
	  (for small values)
	added new 'n' command to do what the old 'P' command did

Changes in bc from 1.04 to 1.05:
    Solaris makes work better.
    bug fixes
	stdout now always does line buffering.
	sqrt bug fixed for small numbers.
	readline (if support is compiled in) is enabled only for
		interactive executions of bc.


This is GNU bc version 1.04.  (And dc version 1.1)

Changes from 1.03

	reorganization of source tree
	use of automake

	new commands for dc (|, ~, r, a)
	new command line options for dc

	fixed infinite loop in sqrt in bc
	fixed an I/O bug in bc
	made bc conform to POSIX for array parameters
	added long option support for bc
	new commandline options for bc (-q)
	added support for readline to bc (use configure --with-readline)
	command line argumens can now be taken from an environment variable
	

Changes from 1.02

	minor bug fixes in bc.

	addition of Ken Pizzini's dc program that uses the GNU bc 
	arbitrary precision arithmetic routines.

Changes from 1.01
	
	minor bug fixes.

haha - 2025