a simple program to extrac unique unicode charaters from a file to standard output. ##Introduction This is a simple program to extrac unique unicode charaters from a file to standard output.
##Sample Run ./unichars poem0.txt
file size: 88
獨在異鄉為客每逢佳節倍思親遙知兄弟登高處遍插茱萸少一人
Number of unichars: 27
./unichars poem.txt
file size: 100
獨在異鄉為客，每逢佳節倍思親。遙知兄弟登高處遍插茱萸少一人
Number of unichars: 29