![]() In this way, we can utilize the empty spaces of the front which was impossible in a Linear Queue. This Overflow Error problem in Linear Queue, even though the queue is not full can be overcome using a Circular Queue.Ī Circular Queue is similar to Linear Queue except for the fact that its last element is connected to its first element, i.e., we can go from the last element to the first element directly in a Circular Queue. Trying to insert an element into the queue throws the Overflow Error as the rear is maximum.ĭifference between Linear Queue and Circular Queue.Even though the queue has an empty space, we still cannot insert an element into the queue as the rear is 3 (maximum for a Queue of size 4).Then we have removed an element, which means that the queue now has an empty space.We have first inserted elements into the queue till it's full.To demonstrate that a linear queue can throw an Overflow Error even if it has empty spaces, In the above example, we have implemented a Linear Queue of Size 4 in C++. Example of Overflow Error in Linear Queue Even though the queue has an empty space, the rear cannot be incremented as it is maximum due to which we cannot enqueue any more elements into the queue. After dequeuing an element from the queue, the front will become 0.Īs of now, the queue has 3 elements, the rear is at 3 (maximum value of rear), and the front is 0. Suppose we enqueue 4 elements into the queue, now that the queue is full, the rear will be 3 and the front will still be -1. To work around this situation, type the number, like this: VB. Dim x As Long x 2000 365 Error: Overflow. At the start of the program, the front will be at -1 and the rear will be at 0, the rear will increase by one upon enqueueing an element into the queue, and the front will increase by one upon dequeueing an element from the queue. You attempt to use a number in a calculation, and that number is coerced into an integer, but the result is larger than an integer. The best way to understand how a linear queue can throw an Overflow Error even though it has empty spaces is to look at an example. The front of a linear queue is the end from which elements are dequeued from the queue, whereas the rear of a linear queue is the end from which new elements are enqueued into the queue. ExplanationĪ Linear Queue implemented using a static array can throw an overflow error even if its number of elements is less than its size.Ī Linear Queue is a linear data structure that works with the First In First Out (FIFO) approach, i.e., the first element to enter the queue will leave be the first element to leave the queue. A Linear Queue can produce an overflow error, even if its number of elements is less than its size. Which Data Structure May Produce an Overflow Error?Ī. A linear queue can throw an Overflow error even if it has empty spaces for elements in it.
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