Circular Queue in Data Structure

Circular Queue:

In a circular queue, when rear or front reaches MAXSIZE-1 then rear or front will be 0. The increment of the rear or front is:

rear=(rear+1) % MAX
and 
front=(front+1) % MAX

Algorithm for insertion into circular queue:

Algorithm fnCirQInsert(arrCQueue[], Data)
{
 if(boolQfull==TRUE)
 Queue is full;
 else
 {
  arrCQueue[rear]=Data;
  rear=(rear+1) % MAXSIZE;
  boolQempty=FALSE;
  if(rear==front)
  boolQfull=TRUE;
 }
}  // End of Algorithm

Algorithm for deletion into circular queue:

Algorithm fnCirQDelete(arrCQueue[])
{
 if(boolQempty==TRUE)
 Queue is empty;
else 
 {
  Data=arrCQueue[front];
  front=(front+1) % MAXSIZE;
  boolQfull=FALSE;
  if(front==rear)
  boolQempty=TRUE;
 }
}