PFN Code

---

DQINSERT(q,n,left,right,item,flag)
1.if (right Mod n)+1=left,then:wite "overflow" and exit
2.if left=null , then : set left:=1, right:=1
else:
if flag=0 , then IF left=1 then : set left:=n
else: set left :=left-1
(مخالف با 0 Else: (IF Flag

set right:=(right Mod n) +1
3. if fag =0 , then set Q[left]:=item
else :
set Q[right]:=item
4.end

PFN Code

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DeQueue(n, left, right, Q, item, flag)
if right=left=null then
queue is empty
else

if flag=0 then
if left=n then left=null
else
left=left+1

else

if right=1 then right=null
else
right=right-1

end