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+#!/usr/local/bin/ruby
+#
+#               biorhythm.rb - 
+#                       $Release Version: $
+#                       $Revision$
+#                       by Yasuo OHBA(STAFS Development Room)
+#
+# --
+#
+#       
+#
+
+# probably based on:
+#
+# Newsgroups: comp.sources.misc,de.comp.sources.os9
+# From: fkk@stasys.sta.sub.org (Frank Kaefer)
+# Subject: v41i126:  br - Biorhythm v3.0, Part01/01
+# Message-ID: <1994Feb1.070616.15982@sparky.sterling.com>
+# Sender: kent@sparky.sterling.com (Kent Landfield)
+# Organization: Sterling Software
+# Date: Tue, 1 Feb 1994 07:06:16 GMT
+#
+# Posting-number: Volume 41, Issue 126
+# Archive-name: br/part01
+# Environment: basic, dos, os9
+
+include Math
+require "date.rb"
+require "optparse"
+require "optparse/date"
+
+def printHeader(y, m, d, p, w)
+  print "\n>>> Biorhythm <<<\n"
+  printf "The birthday %04d.%02d.%02d is a %s\n", y, m, d, w
+  printf "Age in days: [%d]\n\n", p
+end
+
+def getPosition(z)
+  pi = Math::PI
+  z = Integer(z)
+  phys = (50.0 * (1.0 + sin((z / 23.0 - (z / 23)) * 360.0 * pi / 180.0))).to_i
+  emot = (50.0 * (1.0 + sin((z / 28.0 - (z / 28)) * 360.0 * pi / 180.0))).to_i
+  geist =(50.0 * (1.0 + sin((z / 33.0 - (z / 33)) * 360.0 * pi / 180.0))).to_i
+  return phys, emot, geist
+end
+
+def prompt(msg)
+  $stderr.print msg
+  return gets.chomp
+end
+
+#
+# main program
+#
+options = {
+  :graph => true,
+  :date  => Date.today,
+  :days  => 9,
+}
+ARGV.options do |opts|
+  opts.on("-b", "--birthday=DATE", Date, "specify your birthday"){|v|
+    options[:birthday] = v
+  }
+  opts.on("--date=DATE", Date, "specify date to show"){|v|
+    options[:date] = v
+  }
+  opts.on("-g", "--show-graph", TrueClass, "show graph (default)"){|v|
+    options[:graph] = v
+  }
+  opts.on("-v", "--show-values", TrueClass, "show values"){|v|
+    options[:graph] = !v
+  }
+  opts.on("--days=DAYS", Integer, "graph range (only in effect for graph)"){|v|
+    options[:days] = v - 1
+  }
+  opts.on_tail("-h", "--help", "show this message"){puts opts; exit}
+  begin
+    opts.parse!
+  rescue => ex
+    puts "Error: #{ex.message}"
+    puts opts
+    exit
+  end
+end
+
+bd = options[:birthday] || Date.parse(prompt("Your birthday (YYYYMMDD): "))
+dd = options[:date] || Date.today
+ausgabeart = options[:graph] ? "g" : "v"
+display_period = options[:days]
+
+if ausgabeart == "v"
+  printHeader(bd.year, bd.month, bd.day, dd - bd, bd.strftime("%a"))
+  print "\n"
+  
+  phys, emot, geist = getPosition(dd - bd)
+  printf "Biorhythm:   %04d.%02d.%02d\n", dd.year, dd.month, dd.day
+  printf "Physical:    %d%%\n", phys
+  printf "Emotional:   %d%%\n", emot
+  printf "Mental:      %d%%\n", geist
+  print "\n"
+else
+  printHeader(bd.year, bd.month, bd.day, dd - bd, bd.strftime("%a"))
+  print "                     P=physical, E=emotional, M=mental\n"
+  print "             -------------------------+-------------------------\n"
+  print "                     Bad Condition    |    Good Condition\n"
+  print "             -------------------------+-------------------------\n"
+  
+  (dd - bd).step(dd - bd + display_period) do |z|
+    phys, emot, geist = getPosition(z)
+    
+    printf "%04d.%02d.%02d : ", dd.year, dd.month, dd.day
+    p = (phys / 2.0 + 0.5).to_i
+    e = (emot / 2.0 + 0.5).to_i
+    g = (geist / 2.0 + 0.5).to_i
+    graph = "." * 51
+    graph[25] = ?|
+    graph[p] = ?P
+    graph[e] = ?E
+    graph[g] = ?M
+    print graph, "\n"
+    dd = dd + 1
+  end
+  print "             -------------------------+-------------------------\n\n"
+end