Created
May 4, 2013 01:00
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Circular Queue implementation
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class CircularQueue | |
def initialize(size = 32) | |
@data = Array.new | |
@size = size | |
@sp = 0 | |
@ep = 0 | |
end | |
def enqueue(data) | |
if @data[@sp % @size] != nil | |
puts "queue overflow" | |
return | |
end | |
@data[@sp % @size] = data | |
@sp += 1 | |
end | |
def dequeue | |
if @ep >= @sp | |
puts "queue underflow" | |
return | |
end | |
ret = @data[@ep % @size] | |
@data[@ep % @size] = nil | |
@ep += 1 | |
ret | |
end | |
def print | |
for i in 0..@size-1 | |
puts @data[i] | |
end | |
end | |
end | |
q = CircularQueue.new(16) | |
for i in 1..16 | |
q.enqueue i | |
end | |
for i in 1..5 | |
q.dequeue | |
end | |
q.enqueue "kkk" | |
q.print |
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