1. Identification of mistake/error(it can be any type of error or problem which may result in incorrect result) ?
2. Explain why it is an error or a problem ?
3. Correct the problem or give an alternative solution ?

Please explain all the questions accordingly.

heaptype.cpp #include "heaptype.h" template void Swap (ItemType & one, ItemType & two) { ItemType temp; temp = one; one = two; two = temp; } template void HeapType:: ReheapDown (int root, int bottom) { int maxChild; int rightChild; int left Child; left Child = root* 2+1; rightChild = root* 2+2; if (left Child PQType:: PQType (int max) { maxItems = max; items.elements=new ItemType [max]; length = 0; } template PQType: :-PQType() { delete [] items .elements; } template void POType:: MakeEmpty() { length = 0; } template bool PQType:: IsEmpty() { return length == 0; } template bool PQType:: IsFull() { return length == maxItems; } template void HeapType:: ReheapUp (int root, int bottom) { int parent; if (bottom > root) { parent - (bottom-1) / 2; if (elements [parent] void POType: : Enqueue (ItemType newItem) { if (length == maxItems) throw FullPQ(); else { length++; items. elements [length-1] = newItem; items. ReheapUp (0, length-1); template void PQType:: Dequeue (ItemType & item) { if (length == 0) throw EmptyPQ(); else { item = items.elements [0]; items.elements [0] = items. elements[length-1]; length--; items. ReheapDown (0, length-1)