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# Linked list program
class MyElem
def MyElem.new(item)
super.init(item)
end
def init(item)
@data = item
@next = nil
self
end
def data
@data
end
def next
@next
end
def next=(new)
@next = new
end
end
class MyList
def add_to_list(obj)
elt = MyElem.new(obj)
if @head
@tail.next = elt
else
@head = elt
end
@tail = elt
end
def each
elt = @head
while elt
yield elt
elt = elt.next
end
end
def to_s
str = "<MyList:\n";
for elt in self
str += elt.data.to_s + "\n"
end
str += ">"
str
end
end
class Point
def Point.new(x, y)
super.init(x, y)
end
def init(x, y)
@x = x; @y = y
self
end
def to_s
sprintf("%d@%d", @x, @y)
end
end
list1 = MyList.new
list1.add_to_list(10)
list1.add_to_list(20)
list1.add_to_list(Point.new(2, 3))
list1.add_to_list(Point.new(4, 5))
list2 = MyList.new
list2.add_to_list(20)
list2.add_to_list(Point.new(4, 5))
list2.add_to_list(list1)
print("list1:\n", list1, "\n")
print("list2:\n", list2, "\n")
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