Ruby examples added.

git-svn-id: https://swig.svn.sourceforge.net/svnroot/swig/trunk/SWIG@853 626c5289-ae23-0410-ae9c-e8d60b6d4f22

Examples/ruby/class/runme.rb

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+# file: runme.rb
+
+# This file illustrates the C++ interface created by SWIG.
+# All of our C++ classes get converted into Ruby classes.
+
+require 'example'
+
+# ----- Object creation -----
+
+print "Creating some objects:\n"
+c = Example::Circle.new(10)
+print "    Created circle #{c}\n"
+s = Example::Square.new(10)
+print "    Created square #{s}\n"
+
+# ----- Access a static member -----
+
+print "\nA total of #{Example::Shape.nshapes} shapes were created\n"
+
+# ----- Member data access -----
+
+# Set the location of the object
+
+# Notice how we can do this using functions specific to
+# the 'Circle' class.
+c.x = 20
+c.y = 30
+
+# Now use the same functions in the base class
+s.x = -10
+s.y = 5
+
+print "\nHere is their current position:\n"
+print "    Circle = (", c.x, ",", c.y, ")\n"
+print "    Square = (", s.x, ",", s.y, ")\n"
+
+# ----- Call some methods -----
+
+print "\nHere are some properties of the shapes:\n"
+for o in [c, s]
+  print "    #{o}\n"
+  print "        area      = ", o.area, "\n"
+  print "        perimeter = ", o.perimeter, "\n"
+end
+# Notice how the Shape#area() and Shape#perimeter() functions really
+# invoke the appropriate virtual method on each object.
+
+print "\n", Example::Shape.nshapes," shapes remain\n"
+print "Goodbye\n"