In the C++ programming language, a reference is a simple reference datatype that is less powerful but safer than the pointer type inherited from C. The name C++ reference may cause confusion, as in computer science a reference is a general concept datatype, with pointers andC++ references being specific reference datatype implementations Dangling Reference & Const Dangling pointers and wild pointers in computer encoding are pointers that do not point to a valid object of the suitable type. These are special cases of violations of memory safety
Priority queue being used at many places especially in the operating systems. In operating systems, we have queue of different processes. If some process comes with higher priority, it will be processed first. Here we have seen a variation of queue. We will use the priority queue in the simulation. The events will be inserted in the queue and the event going to occur first in future, will be popped. (page 101)
The node to be deleted has either left child (sub-tree) or right child (sub-tree). In this case we bypass the node in such a way that we find the in-order successor of this node and then link the parent of the node to be deleted to this successor node. Thus the node was deleted. (Page 263)