When inserting an element in a priority queue and the heap size is already at max capacity, should you output an error OR increase the array size? I'm currently learning about how to implement priority queues using heaps, but I've  hit a wall while trying to implement the insertion operation. Assume that the size of the array storing the elements of the heap is n, and the size of the heap is also n. Assume further that we try to insert an element 'x' inside the heap. We would have to increment the heap size by 1, but this would now make the heap size greater than the size of the array, which is unacceptable.

So my question is: how do we deal with this problem. Should we A: simply throw an error (since heap size == array size), or B: increase the size of the array by 1. A huge majority of the programs I've seen online implement A, but I think B would be better. Are there any advantages/disadvantages of using A over B (or vice versa)? Are there any other strategies to solving this problem?

Any help is greatly appreciated.
I decided to go with option B, as it seems like the more practical thing to do.