£Á°èZ¨Ä…–K§‚«“ô4“ÒÙ´dîfUÙÃÅ WKbyʦ•êŽ…È®FÒ¿ÊÎóCozá¬S@6{Í:›œêZÌ:Š•_%:¢¾¾~;‘Ã~芩ÊǍí`ÔÑ©ú뙵'5I¿fš×WO%ø9¾«¾DK|€ùÍD”Ýs]nHÕ¶êםӼ㞪éUWŸÈË%DÒÕ¬ï‘]/Åcx ‰ï2ß]ä6G[]S£Ôϯrs{úëóµmÒï#UQxo·õÞCe]"±/aÙ&Eã4ú9Jé_ÞåëdãöKë)AÞ ¯¹ægƒÛowЍø^d™ý½ßB7áyMä9ÜÖUã !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! require 'getoptlong' options = GetoptLong.new( ['--number', '-n', GetoptLong::REQUIRED_ARGUMENT], ['--verbose', '-v', GetoptLong::OPTIONAL_ARGUMENT], ['--help', '-h', GetoptLong::NO_ARGUMENT] ) def help(status = 0) puts <<~HELP Usage: -n n, --number n: Compute Fibonacci number for n. -v [boolean], --verbose [boolean]: Show intermediate results; default is 'false'. -h, --help: Show this help. HELP exit(status) end def print_fibonacci (number) return 0 if number == 0 return 1 if number == 1 or number == 2 i = 0 j = 1 (2..number).each do k = i + j i = j j = k puts j if @verbose end puts j unless @verbose end options.each do |option, argument| case option when '--number' @number = argument.to_i when '--verbose' @verbose = if argument.empty? true elsif argument.match(/true/i) true elsif argument.match(/false/i) false else puts '--verbose argument must be true or false' help(255) end when '--help' help end end unless @number puts 'Option --number is required.' help(255) end print_fibonacci(@number)