Step 1: if rear = max - 1
        Write Overflow
        Go to step 4
        [END OF if]
Step 2: if front = -1 and rear = -1
                SET front = rear = 0
        else
                SET rear = rear + 1
        [END OF if]
Step 3: SET queue[rear] = val
Step 4: EXIT

Step 1: if front = -1 or front > rear
            Write Underflow
        else
            SET val = Queue[front]
            SET front = front + 1
        [END OF if]
Step 2: EXIT

Step 1: if front = -1 or front > rear
                Write Underflow
        else
                return Queue[front]
        [END OF if]
Step 2: EXIT

Step 1: Allocate memory for the new node and name it newNode
Step 2: SET newNode->data = val
Step 3: if front = NULL
                SET front = rear = newNode
                SET front->next = rear->next = NULL
        else
                SET rear->next = newNode
                SET rear = newNode
                SET rear->next = NULL
        [END OF if]
Step 4: EXIT

Step 1: if front = NULL
            Write Underflow
            Go to step 5
        [END OF if]
Step 2: set ptr = front;
Step 3: set ptr = ptr->next
Step 4: free ptr
Step 5: EXIT

Step 1: if front = NULL
                Write Underflow
        else
                return front->data
        [END OF if]
Step 2: EXIT